diff options
Diffstat (limited to 'drivers/char/tpm')
| -rw-r--r-- | drivers/char/tpm/Kconfig | 15 | ||||
| -rw-r--r-- | drivers/char/tpm/Makefile | 5 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm-chip.c | 256 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm-dev.c | 42 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm-interface.c | 265 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm-sysfs.c | 29 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm.h | 125 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm2-cmd.c | 646 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_atmel.c | 25 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_crb.c | 344 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_atmel.c | 52 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_infineon.c | 43 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_nuvoton.c | 69 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_stm_st33.c | 666 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_i2c_stm_st33.h | 61 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_ibmvtpm.c | 47 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_ibmvtpm.h | 2 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_infineon.c | 51 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_nsc.c | 34 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_of.c | 2 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_ppi.c | 141 | ||||
| -rw-r--r-- | drivers/char/tpm/tpm_tis.c | 269 | ||||
| -rw-r--r-- | drivers/char/tpm/xen-tpmfront.c | 14 |
23 files changed, 2260 insertions, 943 deletions
diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig index c54cac3f8bc8..9d4e37549eb2 100644 --- a/drivers/char/tpm/Kconfig +++ b/drivers/char/tpm/Kconfig @@ -100,15 +100,15 @@ config TCG_IBMVTPM will be accessible from within Linux. To compile this driver as a module, choose M here; the module will be called tpm_ibmvtpm. -config TCG_ST33_I2C - tristate "STMicroelectronics ST33 I2C TPM" +config TCG_TIS_I2C_ST33 + tristate "TPM Interface Specification 1.2 Interface (I2C - STMicroelectronics)" depends on I2C depends on GPIOLIB ---help--- If you have a TPM security chip from STMicroelectronics working with an I2C bus 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_stm_st33_i2c. + called tpm_i2c_stm_st33. config TCG_XEN tristate "XEN TPM Interface" @@ -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 4d85dd681b81..990cf183931d 100644 --- a/drivers/char/tpm/Makefile +++ b/drivers/char/tpm/Makefile @@ -2,7 +2,7 @@ # Makefile for the kernel tpm device drivers. # obj-$(CONFIG_TCG_TPM) += tpm.o -tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o +tpm-y := tpm-interface.o tpm-dev.o tpm-sysfs.o tpm-chip.o tpm2-cmd.o tpm-$(CONFIG_ACPI) += tpm_ppi.o ifdef CONFIG_ACPI @@ -20,5 +20,6 @@ obj-$(CONFIG_TCG_NSC) += tpm_nsc.o obj-$(CONFIG_TCG_ATMEL) += tpm_atmel.o obj-$(CONFIG_TCG_INFINEON) += tpm_infineon.o obj-$(CONFIG_TCG_IBMVTPM) += tpm_ibmvtpm.o -obj-$(CONFIG_TCG_ST33_I2C) += tpm_i2c_stm_st33.o +obj-$(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-chip.c b/drivers/char/tpm/tpm-chip.c new file mode 100644 index 000000000000..1d278ccd751f --- /dev/null +++ b/drivers/char/tpm/tpm-chip.c @@ -0,0 +1,256 @@ +/* + * Copyright (C) 2004 IBM Corporation + * Copyright (C) 2014 Intel Corporation + * + * Authors: + * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> + * Leendert van Doorn <leendert@watson.ibm.com> + * Dave Safford <safford@watson.ibm.com> + * Reiner Sailer <sailer@watson.ibm.com> + * Kylene Hall <kjhall@us.ibm.com> + * + * Maintained by: <tpmdd-devel@lists.sourceforge.net> + * + * 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 <linux/major.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); + +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 + */ +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->pdev->driver->owner)) { + chip = pos; + break; + } + } + rcu_read_unlock(); + return chip; +} + +/** + * tpm_dev_release() - free chip memory and the device number + * @dev: the character device for the TPM chip + * + * This is used as the release function for the character device. + */ +static void tpm_dev_release(struct device *dev) +{ + struct tpm_chip *chip = container_of(dev, struct tpm_chip, dev); + + 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->pdev = dev; + + 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, "%s", 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 character device for the TPM chip + * @chip: TPM chip to use. + * + * 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. + * + * 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; + + /* 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; + + 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->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); +} +EXPORT_SYMBOL_GPL(tpm_chip_unregister); diff --git a/drivers/char/tpm/tpm-dev.c b/drivers/char/tpm/tpm-dev.c index d9b774e02a1f..de0337ebd658 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" @@ -54,16 +53,15 @@ 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, * 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 +79,7 @@ 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; } @@ -168,12 +166,12 @@ 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; } -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->dev; - - rc = misc_register(&chip->vendor.miscdev); - if (rc) { - chip->vendor.miscdev.name = NULL; - dev_err(chip->dev, - "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 6af17002a115..e85d3416d899 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 <leendert@watson.ibm.com> @@ -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 @@ -346,7 +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; } @@ -355,7 +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; } @@ -363,7 +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) == @@ -371,7 +371,7 @@ 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; } @@ -381,14 +381,14 @@ 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); @@ -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); @@ -409,9 +410,12 @@ 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); + dev_err(chip->pdev, "A TPM error (%d) occurred %s\n", err, + desc); return err; } @@ -448,7 +452,7 @@ 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 +468,8 @@ 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); @@ -483,9 +487,10 @@ 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) @@ -500,12 +505,12 @@ 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. 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; @@ -513,11 +518,11 @@ 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) { - dev_err(chip->dev, + dev_err(chip->pdev, "A TPM error (%zd) occurred attempting to determine the timeouts\n", rc); goto duration; @@ -556,7 +561,7 @@ 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], @@ -575,8 +580,8 @@ 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; @@ -603,7 +608,7 @@ 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; } @@ -631,32 +636,11 @@ 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; } -/* - * 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 = { @@ -672,8 +656,8 @@ 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, @@ -700,7 +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; } @@ -734,11 +721,17 @@ 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); - 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; @@ -781,7 +774,7 @@ 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; } @@ -791,7 +784,7 @@ 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 @@ -817,7 +810,7 @@ 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; @@ -884,30 +877,6 @@ 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 @@ -932,20 +901,25 @@ int tpm_pm_suspend(struct device *dev) if (chip == NULL) return -ENODEV; + if (chip->flags & TPM_CHIP_FLAG_TPM2) { + tpm2_shutdown(chip, TPM2_SU_STATE); + return 0; + } + /* for buggy tpm, flush pcrs with extend to selected dummy */ if (tpm_suspend_pcr) { cmd.header.in = pcrextend_header; 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 @@ -963,10 +937,10 @@ 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; @@ -1018,11 +992,17 @@ 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); - err = transmit_cmd(chip, &tpm_cmd, + err = tpm_transmit_cmd(chip, &tpm_cmd, TPM_GETRANDOM_RESULT_SIZE + num_bytes, "attempting get random"); if (err) @@ -1041,103 +1021,34 @@ 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) +static int __init tpm_init(void) { - 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); + int rc; - if (!chip) - return; + 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); + } - tpm_dev_vendor_release(chip); + 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; + } - chip->release(dev); - kfree(chip); + return 0; } -/* - * 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) +static void __exit tpm_exit(void) { - 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_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; + class_destroy(tpm_class); + unregister_chrdev_region(tpm_devt, TPM_NUM_DEVICES); } -EXPORT_SYMBOL_GPL(tpm_register_hardware); + +subsys_initcall(tpm_init); +module_exit(tpm_exit); MODULE_AUTHOR("Leendert van Doorn (leendert@watson.ibm.com)"); MODULE_DESCRIPTION("TPM Driver"); diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c index 01730a27ae07..ee66fd4673f3 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; @@ -303,16 +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 e4d0888d2eab..f8319a0860fd 100644 --- a/drivers/char/tpm/tpm.h +++ b/drivers/char/tpm/tpm.h @@ -10,23 +10,24 @@ * Maintained by: <tpmdd-devel@lists.sourceforge.net> * * Device driver for TCG/TCPA TPM (trusted platform module). - * Specifications at www.trustedcomputinggroup.org + * Specifications at www.trustedcomputinggroup.org * * 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/module.h> #include <linux/delay.h> #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 */ @@ -61,6 +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 { @@ -73,7 +127,6 @@ 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 */ @@ -88,15 +141,27 @@ struct tpm_vendor_specific { u16 manufacturer_id; }; -#define TPM_VPRIV(c) (c)->vendor.priv +#define TPM_VPRIV(c) ((c)->vendor.priv) #define TPM_VID_INTEL 0x8086 #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), + TPM_CHIP_FLAG_TPM2 = BIT(2), +}; + struct tpm_chip { - struct device *dev; /* Device stuff */ + struct device *pdev; /* Device stuff */ + struct device dev; + struct cdev cdev; + const struct tpm_class_ops *ops; + unsigned int flags; int dev_num; /* /dev/tpm# */ char devname[7]; @@ -109,15 +174,19 @@ 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; - void (*release) (struct device *); }; #define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor) 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) @@ -313,40 +382,58 @@ struct tpm_cmd_t { tpm_cmd_params params; } __packed; -ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *); +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); +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 *); 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); -int tpm_dev_add_device(struct tpm_chip *chip); -void tpm_dev_del_device(struct tpm_chip *chip); +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_sysfs_add_device(struct tpm_chip *chip); 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 + +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 void 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); +extern int tpm2_probe(struct tpm_chip *chip); diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c new file mode 100644 index 000000000000..011909a9be96 --- /dev/null +++ b/drivers/char/tpm/tpm2-cmd.c @@ -0,0 +1,646 @@ +/* + * Copyright (C) 2014 Intel Corporation + * + * Authors: + * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> + * + * Maintained by: <tpmdd-devel@lists.sourceforge.net> + * + * 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_startup_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. + */ +void tpm2_shutdown(struct tpm_chip *chip, u16 shutdown_type) +{ + struct tpm2_cmd cmd; + int rc; + + cmd.header.in = tpm2_shutdown_header; + cmd.params.startup_in.startup_type = cpu_to_be16(shutdown_type); + + rc = tpm_transmit_cmd(chip, &cmd, sizeof(cmd), "stopping the TPM"); + + /* In places where shutdown command is sent there's no much we can do + * except print the error code on a system failure. + */ + if (rc < 0) + dev_warn(chip->pdev, "transmit returned %d while stopping the TPM", + rc); +} +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 + * + * 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) +{ + u32 dummy; + + return tpm2_get_tpm_pt(chip, 0x100, &dummy, + "attempting to generate an interrupt"); +} +EXPORT_SYMBOL_GPL(tpm2_gen_interrupt); + +/** + * tpm2_probe() - probe TPM 2.0 + * @chip: TPM chip to use + * + * Send idempotent TPM 2.0 command and see whether TPM 2.0 chip replied based on + * the reply tag. + */ +int tpm2_probe(struct tpm_chip *chip) +{ + 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(0x100); + cmd.params.get_tpm_pt_in.property_cnt = cpu_to_be32(1); + + rc = tpm_transmit(chip, (const char *) &cmd, sizeof(cmd)); + if (rc < 0) + return rc; + else if (rc < TPM_HEADER_SIZE) + return -EFAULT; + + if (be16_to_cpu(cmd.header.out.tag) == TPM2_ST_NO_SESSIONS) + chip->flags |= TPM_CHIP_FLAG_TPM2; + + return 0; +} +EXPORT_SYMBOL_GPL(tpm2_probe); diff --git a/drivers/char/tpm/tpm_atmel.c b/drivers/char/tpm/tpm_atmel.c index 435c8b9dd2f8..dfadad0916a1 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); } @@ -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); } } @@ -183,8 +183,9 @@ 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; } @@ -193,6 +194,10 @@ 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_crb.c b/drivers/char/tpm/tpm_crb.c new file mode 100644 index 000000000000..b26ceee3585e --- /dev/null +++ b/drivers/char/tpm/tpm_crb.c @@ -0,0 +1,344 @@ +/* + * Copyright (C) 2014 Intel Corporation + * + * Authors: + * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> + * + * Maintained by: <tpmdd-devel@lists.sourceforge.net> + * + * 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; +}; + +static SIMPLE_DEV_PM_OPS(crb_pm, tpm_pm_suspend, tpm_pm_resume); + +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); + + if (chip->flags & TPM_CHIP_FLAG_TPM2) + tpm2_shutdown(chip, TPM2_SU_CLEAR); + + 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 <jarkko.sakkinen@linux.intel.com>"); +MODULE_DESCRIPTION("TPM2 Driver"); +MODULE_VERSION("0.1"); +MODULE_LICENSE("GPL"); diff --git a/drivers/char/tpm/tpm_i2c_atmel.c b/drivers/char/tpm/tpm_i2c_atmel.c index 77272925dee6..7a0ca78ad3c6 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; @@ -153,21 +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) + return -ENOMEM; /* Default timeouts */ chip->vendor.timeout_a = msecs_to_jiffies(TPM_I2C_SHORT_TIMEOUT); @@ -179,33 +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); - - if (chip) - 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 472af4bb1b61..33c5f360ab01 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; } @@ -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 7b158efd49f7..9d42b7d78e50 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; @@ -530,14 +530,15 @@ 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) + return -ENOMEM; + init_waitqueue_head(&chip->vendor.read_queue); init_waitqueue_head(&chip->vendor.int_queue); @@ -559,7 +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", @@ -584,7 +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 { @@ -594,45 +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); - - if (chip) - 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 4669e3713428..612845b36c29 100644 --- a/drivers/char/tpm/tpm_i2c_stm_st33.c +++ b/drivers/char/tpm/tpm_i2c_stm_st33.c @@ -1,6 +1,6 @@ /* * STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24 - * Copyright (C) 2009, 2010 STMicroelectronics + * Copyright (C) 2009, 2010, 2014 STMicroelectronics * * 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 @@ -12,11 +12,10 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <http://www.gnu.org/licenses/>. * - * STMicroelectronics version 1.2.0, Copyright (C) 2010 + * STMicroelectronics version 1.2.1, Copyright (C) 2014 * STMicroelectronics comes with ABSOLUTELY NO WARRANTY. * This is free software, and you are welcome to redistribute it * under certain conditions. @@ -27,7 +26,7 @@ * * @Synopsis: * 09/15/2010: First shot driver tpm_tis driver for - lpc is used as model. + * lpc is used as model. */ #include <linux/pci.h> @@ -39,18 +38,38 @@ #include <linux/kernel.h> #include <linux/delay.h> #include <linux/wait.h> +#include <linux/freezer.h> #include <linux/string.h> #include <linux/interrupt.h> -#include <linux/spinlock.h> #include <linux/sysfs.h> #include <linux/gpio.h> #include <linux/sched.h> #include <linux/uaccess.h> #include <linux/io.h> #include <linux/slab.h> +#include <linux/of_irq.h> +#include <linux/of_gpio.h> +#include <linux/platform_data/tpm_stm_st33.h> #include "tpm.h" -#include "tpm_i2c_stm_st33.h" + +#define TPM_ACCESS 0x0 +#define TPM_STS 0x18 +#define TPM_HASH_END 0x20 +#define TPM_DATA_FIFO 0x24 +#define TPM_HASH_DATA 0x24 +#define TPM_HASH_START 0x28 +#define TPM_INTF_CAPABILITY 0x14 +#define TPM_INT_STATUS 0x10 +#define TPM_INT_ENABLE 0x08 + +#define TPM_DUMMY_BYTE 0xAA +#define TPM_WRITE_DIRECTION 0x80 +#define TPM_HEADER_SIZE 10 +#define TPM_BUFSIZE 2048 + +#define LOCALITY0 0 + enum stm33zp24_access { TPM_ACCESS_VALID = 0x80, @@ -82,6 +101,14 @@ enum tis_defaults { TIS_LONG_TIMEOUT = 2000, }; +struct tpm_stm_dev { + struct i2c_client *client; + struct tpm_chip *chip; + u8 buf[TPM_BUFSIZE + 1]; + u32 intrs; + int io_lpcpd; +}; + /* * write8_reg * Send byte to the TIS register according to the ST33ZP24 I2C protocol. @@ -90,17 +117,12 @@ enum tis_defaults { * @param: tpm_size, The length of the data * @return: Returns negative errno, or else the number of bytes written. */ -static int write8_reg(struct i2c_client *client, u8 tpm_register, +static int write8_reg(struct tpm_stm_dev *tpm_dev, u8 tpm_register, u8 *tpm_data, u16 tpm_size) { - struct st33zp24_platform_data *pin_infos; - - pin_infos = client->dev.platform_data; - - pin_infos->tpm_i2c_buffer[0][0] = tpm_register; - memcpy(&pin_infos->tpm_i2c_buffer[0][1], tpm_data, tpm_size); - return i2c_master_send(client, pin_infos->tpm_i2c_buffer[0], - tpm_size + 1); + tpm_dev->buf[0] = tpm_register; + memcpy(tpm_dev->buf + 1, tpm_data, tpm_size); + return i2c_master_send(tpm_dev->client, tpm_dev->buf, tpm_size + 1); } /* write8_reg() */ /* @@ -111,101 +133,58 @@ static int write8_reg(struct i2c_client *client, u8 tpm_register, * @param: tpm_size, tpm TPM response size to read. * @return: number of byte read successfully: should be one if success. */ -static int read8_reg(struct i2c_client *client, u8 tpm_register, +static int read8_reg(struct tpm_stm_dev *tpm_dev, u8 tpm_register, u8 *tpm_data, int tpm_size) { u8 status = 0; u8 data; data = TPM_DUMMY_BYTE; - status = write8_reg(client, tpm_register, &data, 1); + status = write8_reg(tpm_dev, tpm_register, &data, 1); if (status == 2) - status = i2c_master_recv(client, tpm_data, tpm_size); + status = i2c_master_recv(tpm_dev->client, tpm_data, tpm_size); return status; } /* read8_reg() */ /* * I2C_WRITE_DATA * Send byte to the TIS register according to the ST33ZP24 I2C protocol. - * @param: client, the chip description + * @param: tpm_dev, the chip description * @param: tpm_register, the tpm tis register where the data should be written * @param: tpm_data, the tpm_data to write inside the tpm_register * @param: tpm_size, The length of the data * @return: number of byte written successfully: should be one if success. */ -#define I2C_WRITE_DATA(client, tpm_register, tpm_data, tpm_size) \ - (write8_reg(client, tpm_register | \ +#define I2C_WRITE_DATA(tpm_dev, tpm_register, tpm_data, tpm_size) \ + (write8_reg(tpm_dev, tpm_register | \ TPM_WRITE_DIRECTION, tpm_data, tpm_size)) /* * I2C_READ_DATA * Recv byte from the TIS register according to the ST33ZP24 I2C protocol. - * @param: tpm, the chip description + * @param: tpm_dev, the chip description * @param: tpm_register, the tpm tis register where the data should be read * @param: tpm_data, the TPM response * @param: tpm_size, tpm TPM response size to read. * @return: number of byte read successfully: should be one if success. */ -#define I2C_READ_DATA(client, tpm_register, tpm_data, tpm_size) \ - (read8_reg(client, tpm_register, tpm_data, tpm_size)) +#define I2C_READ_DATA(tpm_dev, tpm_register, tpm_data, tpm_size) \ + (read8_reg(tpm_dev, tpm_register, tpm_data, tpm_size)) /* * clear_interruption * clear the TPM interrupt register. * @param: tpm, the chip description + * @return: the TPM_INT_STATUS value */ -static void clear_interruption(struct i2c_client *client) +static u8 clear_interruption(struct tpm_stm_dev *tpm_dev) { u8 interrupt; - I2C_READ_DATA(client, TPM_INT_STATUS, &interrupt, 1); - I2C_WRITE_DATA(client, TPM_INT_STATUS, &interrupt, 1); - I2C_READ_DATA(client, TPM_INT_STATUS, &interrupt, 1); -} /* clear_interruption() */ - -/* - * _wait_for_interrupt_serirq_timeout - * @param: tpm, the chip description - * @param: timeout, the timeout of the interrupt - * @return: the status of the interruption. - */ -static long _wait_for_interrupt_serirq_timeout(struct tpm_chip *chip, - unsigned long timeout) -{ - long status; - struct i2c_client *client; - struct st33zp24_platform_data *pin_infos; - - client = (struct i2c_client *)TPM_VPRIV(chip); - pin_infos = client->dev.platform_data; - - status = wait_for_completion_interruptible_timeout( - &pin_infos->irq_detection, - timeout); - if (status > 0) - enable_irq(gpio_to_irq(pin_infos->io_serirq)); - gpio_direction_input(pin_infos->io_serirq); - - return status; -} /* wait_for_interrupt_serirq_timeout() */ - -static int wait_for_serirq_timeout(struct tpm_chip *chip, bool condition, - unsigned long timeout) -{ - int status = 2; - struct i2c_client *client; - - client = (struct i2c_client *)TPM_VPRIV(chip); - status = _wait_for_interrupt_serirq_timeout(chip, timeout); - if (!status) { - status = -EBUSY; - } else { - clear_interruption(client); - if (condition) - status = 1; - } - return status; -} + I2C_READ_DATA(tpm_dev, TPM_INT_STATUS, &interrupt, 1); + I2C_WRITE_DATA(tpm_dev, TPM_INT_STATUS, &interrupt, 1); + return interrupt; +} /* clear_interruption() */ /* * tpm_stm_i2c_cancel, cancel is not implemented. @@ -213,16 +192,14 @@ static int wait_for_serirq_timeout(struct tpm_chip *chip, bool condition, */ static void tpm_stm_i2c_cancel(struct tpm_chip *chip) { - struct i2c_client *client; + struct tpm_stm_dev *tpm_dev; u8 data; - client = (struct i2c_client *)TPM_VPRIV(chip); + tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); data = TPM_STS_COMMAND_READY; - I2C_WRITE_DATA(client, TPM_STS, &data, 1); - if (chip->vendor.irq) - wait_for_serirq_timeout(chip, 1, chip->vendor.timeout_a); -} /* tpm_stm_i2c_cancel() */ + I2C_WRITE_DATA(tpm_dev, TPM_STS, &data, 1); +} /* tpm_stm_i2c_cancel() */ /* * tpm_stm_spi_status return the TPM_STS register @@ -231,13 +208,14 @@ static void tpm_stm_i2c_cancel(struct tpm_chip *chip) */ static u8 tpm_stm_i2c_status(struct tpm_chip *chip) { - struct i2c_client *client; + struct tpm_stm_dev *tpm_dev; u8 data; - client = (struct i2c_client *)TPM_VPRIV(chip); - I2C_READ_DATA(client, TPM_STS, &data, 1); + tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); + + I2C_READ_DATA(tpm_dev, TPM_STS, &data, 1); return data; -} /* tpm_stm_i2c_status() */ +} /* tpm_stm_i2c_status() */ /* @@ -247,20 +225,19 @@ static u8 tpm_stm_i2c_status(struct tpm_chip *chip) */ static int check_locality(struct tpm_chip *chip) { - struct i2c_client *client; + struct tpm_stm_dev *tpm_dev; u8 data; u8 status; - client = (struct i2c_client *)TPM_VPRIV(chip); + tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); - status = I2C_READ_DATA(client, TPM_ACCESS, &data, 1); + status = I2C_READ_DATA(tpm_dev, TPM_ACCESS, &data, 1); if (status && (data & (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) == (TPM_ACCESS_ACTIVE_LOCALITY | TPM_ACCESS_VALID)) return chip->vendor.locality; return -EACCES; - } /* check_locality() */ /* @@ -271,37 +248,31 @@ static int check_locality(struct tpm_chip *chip) static int request_locality(struct tpm_chip *chip) { unsigned long stop; - long rc; - struct i2c_client *client; + long ret; + struct tpm_stm_dev *tpm_dev; u8 data; - client = (struct i2c_client *)TPM_VPRIV(chip); - if (check_locality(chip) == chip->vendor.locality) return chip->vendor.locality; + tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); + data = TPM_ACCESS_REQUEST_USE; - rc = I2C_WRITE_DATA(client, TPM_ACCESS, &data, 1); - if (rc < 0) + ret = I2C_WRITE_DATA(tpm_dev, TPM_ACCESS, &data, 1); + if (ret < 0) goto end; - if (chip->vendor.irq) { - rc = wait_for_serirq_timeout(chip, (check_locality - (chip) >= 0), - chip->vendor.timeout_a); - if (rc > 0) + stop = jiffies + chip->vendor.timeout_a; + + /* Request locality is usually effective after the request */ + do { + if (check_locality(chip) >= 0) return chip->vendor.locality; - } else { - stop = jiffies + chip->vendor.timeout_a; - do { - if (check_locality(chip) >= 0) - return chip->vendor.locality; - msleep(TPM_TIMEOUT); - } while (time_before(jiffies, stop)); - } - rc = -EACCES; + msleep(TPM_TIMEOUT); + } while (time_before(jiffies, stop)); + ret = -EACCES; end: - return rc; + return ret; } /* request_locality() */ /* @@ -310,13 +281,13 @@ end: */ static void release_locality(struct tpm_chip *chip) { - struct i2c_client *client; + struct tpm_stm_dev *tpm_dev; u8 data; - client = (struct i2c_client *)TPM_VPRIV(chip); + tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); data = TPM_ACCESS_ACTIVE_LOCALITY; - I2C_WRITE_DATA(client, TPM_ACCESS, &data, 1); + I2C_WRITE_DATA(tpm_dev, TPM_ACCESS, &data, 1); } /* @@ -329,19 +300,20 @@ static int get_burstcount(struct tpm_chip *chip) unsigned long stop; int burstcnt, status; u8 tpm_reg, temp; + struct tpm_stm_dev *tpm_dev; - struct i2c_client *client = (struct i2c_client *)TPM_VPRIV(chip); + tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); stop = jiffies + chip->vendor.timeout_d; do { tpm_reg = TPM_STS + 1; - status = I2C_READ_DATA(client, tpm_reg, &temp, 1); + status = I2C_READ_DATA(tpm_dev, tpm_reg, &temp, 1); if (status < 0) goto end; tpm_reg = tpm_reg + 1; burstcnt = temp; - status = I2C_READ_DATA(client, tpm_reg, &temp, 1); + status = I2C_READ_DATA(tpm_dev, tpm_reg, &temp, 1); if (status < 0) goto end; @@ -355,36 +327,107 @@ end: return -EBUSY; } /* get_burstcount() */ +static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask, + bool check_cancel, bool *canceled) +{ + u8 status = chip->ops->status(chip); + + *canceled = false; + if ((status & mask) == mask) + return true; + if (check_cancel && chip->ops->req_canceled(chip, status)) { + *canceled = true; + return true; + } + return false; +} + +/* + * interrupt_to_status + * @param: irq_mask, the irq mask value to wait + * @return: the corresponding tpm_sts value + */ +static u8 interrupt_to_status(u8 irq_mask) +{ + u8 status = 0; + + if ((irq_mask & TPM_INTF_STS_VALID_INT) == TPM_INTF_STS_VALID_INT) + status |= TPM_STS_VALID; + if ((irq_mask & TPM_INTF_DATA_AVAIL_INT) == TPM_INTF_DATA_AVAIL_INT) + status |= TPM_STS_DATA_AVAIL; + if ((irq_mask & TPM_INTF_CMD_READY_INT) == TPM_INTF_CMD_READY_INT) + status |= TPM_STS_COMMAND_READY; + + return status; +} /* status_to_interrupt() */ + /* * wait_for_stat wait for a TPM_STS value * @param: chip, the tpm chip description * @param: mask, the value mask to wait * @param: timeout, the timeout * @param: queue, the wait queue. + * @param: check_cancel, does the command can be cancelled ? * @return: the tpm status, 0 if success, -ETIME if timeout is reached. */ static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout, - wait_queue_head_t *queue) + wait_queue_head_t *queue, bool check_cancel) { unsigned long stop; - long rc; - u8 status; + int ret; + bool canceled = false; + bool condition; + u32 cur_intrs; + u8 interrupt, status; + struct tpm_stm_dev *tpm_dev; - if (chip->vendor.irq) { - rc = wait_for_serirq_timeout(chip, ((tpm_stm_i2c_status - (chip) & mask) == - mask), timeout); - if (rc > 0) + tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); + + /* check current status */ + status = tpm_stm_i2c_status(chip); + if ((status & mask) == mask) + return 0; + + stop = jiffies + timeout; + + if (chip->vendor.irq) { + cur_intrs = tpm_dev->intrs; + interrupt = clear_interruption(tpm_dev); + enable_irq(chip->vendor.irq); + +again: + timeout = stop - jiffies; + if ((long) timeout <= 0) + return -1; + + ret = wait_event_interruptible_timeout(*queue, + cur_intrs != tpm_dev->intrs, timeout); + + interrupt |= clear_interruption(tpm_dev); + status = interrupt_to_status(interrupt); + condition = wait_for_tpm_stat_cond(chip, mask, + check_cancel, &canceled); + + if (ret >= 0 && condition) { + if (canceled) + return -ECANCELED; return 0; + } + if (ret == -ERESTARTSYS && freezing(current)) { + clear_thread_flag(TIF_SIGPENDING); + goto again; + } + disable_irq_nosync(chip->vendor.irq); + } else { - stop = jiffies + timeout; do { msleep(TPM_TIMEOUT); - status = tpm_stm_i2c_status(chip); + status = chip->ops->status(chip); if ((status & mask) == mask) return 0; } while (time_before(jiffies, stop)); } + return -ETIME; } /* wait_for_stat() */ @@ -397,22 +440,24 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout, */ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count) { - int size = 0, burstcnt, len; - struct i2c_client *client; + int size = 0, burstcnt, len, ret; + struct tpm_stm_dev *tpm_dev; - client = (struct i2c_client *)TPM_VPRIV(chip); + tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); while (size < count && wait_for_stat(chip, TPM_STS_DATA_AVAIL | TPM_STS_VALID, chip->vendor.timeout_c, - &chip->vendor.read_queue) - == 0) { + &chip->vendor.read_queue, true) == 0) { burstcnt = get_burstcount(chip); if (burstcnt < 0) return burstcnt; len = min_t(int, burstcnt, count - size); - I2C_READ_DATA(client, TPM_DATA_FIFO, buf + size, len); + ret = I2C_READ_DATA(tpm_dev, TPM_DATA_FIFO, buf + size, len); + if (ret < 0) + return ret; + size += len; } return size; @@ -427,15 +472,14 @@ static int recv_data(struct tpm_chip *chip, u8 *buf, size_t count) static irqreturn_t tpm_ioserirq_handler(int irq, void *dev_id) { struct tpm_chip *chip = dev_id; - struct i2c_client *client; - struct st33zp24_platform_data *pin_infos; + struct tpm_stm_dev *tpm_dev; - disable_irq_nosync(irq); + tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); - client = (struct i2c_client *)TPM_VPRIV(chip); - pin_infos = client->dev.platform_data; + tpm_dev->intrs++; + wake_up_interruptible(&chip->vendor.read_queue); + disable_irq_nosync(chip->vendor.irq); - complete(&pin_infos->irq_detection); return IRQ_HANDLED; } /* tpm_ioserirq_handler() */ @@ -457,13 +501,15 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf, int ret; u8 data; struct i2c_client *client; + struct tpm_stm_dev *tpm_dev; - if (chip == NULL) + if (!chip) return -EBUSY; if (len < TPM_HEADER_SIZE) return -EBUSY; - client = (struct i2c_client *)TPM_VPRIV(chip); + tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); + client = tpm_dev->client; client->flags = 0; @@ -476,7 +522,7 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf, tpm_stm_i2c_cancel(chip); if (wait_for_stat (chip, TPM_STS_COMMAND_READY, chip->vendor.timeout_b, - &chip->vendor.int_queue) < 0) { + &chip->vendor.read_queue, false) < 0) { ret = -ETIME; goto out_err; } @@ -487,7 +533,7 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf, if (burstcnt < 0) return burstcnt; size = min_t(int, len - i - 1, burstcnt); - ret = I2C_WRITE_DATA(client, TPM_DATA_FIFO, buf, size); + ret = I2C_WRITE_DATA(tpm_dev, TPM_DATA_FIFO, buf + i, size); if (ret < 0) goto out_err; @@ -500,7 +546,7 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf, goto out_err; } - ret = I2C_WRITE_DATA(client, TPM_DATA_FIFO, buf + len - 1, 1); + ret = I2C_WRITE_DATA(tpm_dev, TPM_DATA_FIFO, buf + len - 1, 1); if (ret < 0) goto out_err; @@ -511,7 +557,7 @@ static int tpm_stm_i2c_send(struct tpm_chip *chip, unsigned char *buf, } data = TPM_STS_GO; - I2C_WRITE_DATA(client, TPM_STS, &data, 1); + I2C_WRITE_DATA(tpm_dev, TPM_STS, &data, 1); return len; out_err: @@ -526,7 +572,7 @@ out_err: * @param: buf, the buffer to store datas. * @param: count, the number of bytes to send. * @return: In case of success the number of bytes received. - * In other case, a < 0 value describing the issue. + * In other case, a < 0 value describing the issue. */ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf, size_t count) @@ -534,7 +580,7 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf, int size = 0; int expected; - if (chip == NULL) + if (!chip) return -EBUSY; if (count < TPM_HEADER_SIZE) { @@ -544,7 +590,7 @@ 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; } @@ -555,9 +601,9 @@ 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); + 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; } @@ -568,7 +614,7 @@ out: return size; } -static bool tpm_st33_i2c_req_canceled(struct tpm_chip *chip, u8 status) +static bool tpm_stm_i2c_req_canceled(struct tpm_chip *chip, u8 status) { return (status == TPM_STS_COMMAND_READY); } @@ -580,75 +626,134 @@ static const struct tpm_class_ops st_i2c_tpm = { .status = tpm_stm_i2c_status, .req_complete_mask = TPM_STS_DATA_AVAIL | TPM_STS_VALID, .req_complete_val = TPM_STS_DATA_AVAIL | TPM_STS_VALID, - .req_canceled = tpm_st33_i2c_req_canceled, + .req_canceled = tpm_stm_i2c_req_canceled, }; -static int interrupts; -module_param(interrupts, int, 0444); -MODULE_PARM_DESC(interrupts, "Enable interrupts"); +#ifdef CONFIG_OF +static int tpm_stm_i2c_of_request_resources(struct tpm_chip *chip) +{ + struct device_node *pp; + struct tpm_stm_dev *tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); + struct i2c_client *client = tpm_dev->client; + int gpio; + int ret; + + pp = client->dev.of_node; + if (!pp) { + 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->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 + * power management can be also managed by TPM specific + * commands. So leave with a success status code. + */ + return 0; + } + /* GPIO request and configuration */ + ret = devm_gpio_request_one(&client->dev, gpio, + GPIOF_OUT_INIT_HIGH, "TPM IO LPCPD"); + if (ret) { + dev_err(chip->pdev, "Failed to request lpcpd pin\n"); + return -ENODEV; + } + tpm_dev->io_lpcpd = gpio; + + return 0; +} +#else +static int tpm_stm_i2c_of_request_resources(struct tpm_chip *chip) +{ + return -ENODEV; +} +#endif -static int power_mgt = 1; -module_param(power_mgt, int, 0444); -MODULE_PARM_DESC(power_mgt, "Power Management"); +static int tpm_stm_i2c_request_resources(struct i2c_client *client, + struct tpm_chip *chip) +{ + struct st33zp24_platform_data *pdata; + struct tpm_stm_dev *tpm_dev = (struct tpm_stm_dev *)TPM_VPRIV(chip); + int ret; + + pdata = client->dev.platform_data; + if (!pdata) { + dev_err(chip->pdev, "No platform data\n"); + return -ENODEV; + } + + /* store for late use */ + tpm_dev->io_lpcpd = pdata->io_lpcpd; + + if (gpio_is_valid(pdata->io_lpcpd)) { + ret = devm_gpio_request_one(&client->dev, + pdata->io_lpcpd, GPIOF_OUT_INIT_HIGH, + "TPM IO_LPCPD"); + if (ret) { + dev_err(chip->pdev, "%s : reset gpio_request failed\n", + __FILE__); + return ret; + } + } + + return 0; +} /* - * tpm_st33_i2c_probe initialize the TPM device + * tpm_stm_i2c_probe initialize the TPM device * @param: client, the i2c_client drescription (TPM I2C description). * @param: id, the i2c_device_id struct. * @return: 0 in case of success. * -1 in other case. */ static int -tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) +tpm_stm_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { - int err; - u8 intmask; + int ret; + u8 intmask = 0; struct tpm_chip *chip; struct st33zp24_platform_data *platform_data; + struct tpm_stm_dev *tpm_dev; - if (client == NULL) { + if (!client) { pr_info("%s: i2c client is NULL. Device not accessible.\n", __func__); - err = -ENODEV; - goto end; + return -ENODEV; } if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { dev_info(&client->dev, "client not i2c capable\n"); - err = -ENODEV; - goto end; + return -ENODEV; } - chip = tpm_register_hardware(&client->dev, &st_i2c_tpm); - if (!chip) { - dev_info(&client->dev, "fail chip\n"); - err = -ENODEV; - goto end; - } + tpm_dev = devm_kzalloc(&client->dev, sizeof(struct tpm_stm_dev), + GFP_KERNEL); + if (!tpm_dev) + return -ENOMEM; - platform_data = client->dev.platform_data; + chip = tpmm_chip_alloc(&client->dev, &st_i2c_tpm); + if (IS_ERR(chip)) + return PTR_ERR(chip); - if (!platform_data) { - dev_info(&client->dev, "chip not available\n"); - err = -ENODEV; - goto _tpm_clean_answer; - } + TPM_VPRIV(chip) = tpm_dev; + tpm_dev->client = client; - platform_data->tpm_i2c_buffer[0] = - kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL); - if (platform_data->tpm_i2c_buffer[0] == NULL) { - err = -ENOMEM; - goto _tpm_clean_answer; - } - platform_data->tpm_i2c_buffer[1] = - kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL); - if (platform_data->tpm_i2c_buffer[1] == NULL) { - err = -ENOMEM; - goto _tpm_clean_response1; + platform_data = client->dev.platform_data; + if (!platform_data && client->dev.of_node) { + ret = tpm_stm_i2c_of_request_resources(chip); + if (ret) + goto _tpm_clean_answer; + } else if (platform_data) { + ret = tpm_stm_i2c_request_resources(client, chip); + if (ret) + goto _tpm_clean_answer; } - TPM_VPRIV(chip) = client; - 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); @@ -656,59 +761,44 @@ tpm_st33_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) chip->vendor.locality = LOCALITY0; - if (power_mgt) { - err = gpio_request(platform_data->io_lpcpd, "TPM IO_LPCPD"); - if (err) - goto _gpio_init1; - gpio_set_value(platform_data->io_lpcpd, 1); - } + if (client->irq) { + /* INTERRUPT Setup */ + init_waitqueue_head(&chip->vendor.read_queue); + tpm_dev->intrs = 0; - if (interrupts) { - init_completion(&platform_data->irq_detection); if (request_locality(chip) != LOCALITY0) { - err = -ENODEV; - goto _tpm_clean_response2; + ret = -ENODEV; + goto _tpm_clean_answer; } - err = gpio_request(platform_data->io_serirq, "TPM IO_SERIRQ"); - if (err) - goto _gpio_init2; - clear_interruption(client); - err = request_irq(gpio_to_irq(platform_data->io_serirq), - &tpm_ioserirq_handler, + clear_interruption(tpm_dev); + ret = devm_request_irq(&client->dev, client->irq, + tpm_ioserirq_handler, IRQF_TRIGGER_HIGH, "TPM SERIRQ management", chip); - if (err < 0) { - dev_err(chip->dev , "TPM SERIRQ signals %d not available\n", - gpio_to_irq(platform_data->io_serirq)); - goto _irq_set; + if (ret < 0) { + dev_err(chip->pdev, "TPM SERIRQ signals %d not available\n", + client->irq); + goto _tpm_clean_answer; } - err = I2C_READ_DATA(client, TPM_INT_ENABLE, &intmask, 1); - if (err < 0) - goto _irq_set; - intmask |= TPM_INTF_CMD_READY_INT - | TPM_INTF_FIFO_AVALAIBLE_INT - | TPM_INTF_WAKE_UP_READY_INT - | TPM_INTF_LOCALITY_CHANGE_INT | TPM_INTF_STS_VALID_INT | TPM_INTF_DATA_AVAIL_INT; - err = I2C_WRITE_DATA(client, TPM_INT_ENABLE, &intmask, 1); - if (err < 0) - goto _irq_set; + ret = I2C_WRITE_DATA(tpm_dev, TPM_INT_ENABLE, &intmask, 1); + if (ret < 0) + goto _tpm_clean_answer; intmask = TPM_GLOBAL_INT_ENABLE; - err = I2C_WRITE_DATA(client, (TPM_INT_ENABLE + 3), &intmask, 1); - if (err < 0) - goto _irq_set; + ret = I2C_WRITE_DATA(tpm_dev, (TPM_INT_ENABLE + 3), + &intmask, 1); + if (ret < 0) + goto _tpm_clean_answer; - err = I2C_READ_DATA(client, TPM_INT_STATUS, &intmask, 1); - if (err < 0) - goto _irq_set; + chip->vendor.irq = client->irq; - chip->vendor.irq = interrupts; + disable_irq_nosync(chip->vendor.irq); tpm_gen_interrupt(chip); } @@ -716,130 +806,106 @@ tpm_st33_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; -_irq_set: - free_irq(gpio_to_irq(platform_data->io_serirq), (void *)chip); -_gpio_init2: - if (interrupts) - gpio_free(platform_data->io_serirq); -_gpio_init1: - if (power_mgt) - gpio_free(platform_data->io_lpcpd); -_tpm_clean_response2: - kzfree(platform_data->tpm_i2c_buffer[1]); - platform_data->tpm_i2c_buffer[1] = NULL; -_tpm_clean_response1: - kzfree(platform_data->tpm_i2c_buffer[0]); - platform_data->tpm_i2c_buffer[0] = NULL; + return tpm_chip_register(chip); _tpm_clean_answer: - tpm_remove_hardware(chip->dev); -end: - pr_info("TPM I2C initialisation fail\n"); - return err; + dev_info(chip->pdev, "TPM I2C initialisation fail\n"); + return ret; } /* - * tpm_st33_i2c_remove remove the TPM device - * @param: client, the i2c_client drescription (TPM I2C description). - clear_bit(0, &chip->is_open); + * tpm_stm_i2c_remove remove the TPM device + * @param: client, the i2c_client description (TPM I2C description). * @return: 0 in case of success. */ -static int tpm_st33_i2c_remove(struct i2c_client *client) +static int tpm_stm_i2c_remove(struct i2c_client *client) { - struct tpm_chip *chip = (struct tpm_chip *)i2c_get_clientdata(client); - struct st33zp24_platform_data *pin_infos = - ((struct i2c_client *)TPM_VPRIV(chip))->dev.platform_data; - - if (pin_infos != NULL) { - free_irq(pin_infos->io_serirq, chip); - - gpio_free(pin_infos->io_serirq); - gpio_free(pin_infos->io_lpcpd); - - tpm_remove_hardware(chip->dev); + struct tpm_chip *chip = + (struct tpm_chip *) i2c_get_clientdata(client); - if (pin_infos->tpm_i2c_buffer[1] != NULL) { - kzfree(pin_infos->tpm_i2c_buffer[1]); - pin_infos->tpm_i2c_buffer[1] = NULL; - } - if (pin_infos->tpm_i2c_buffer[0] != NULL) { - kzfree(pin_infos->tpm_i2c_buffer[0]); - pin_infos->tpm_i2c_buffer[0] = NULL; - } - } + if (chip) + tpm_chip_unregister(chip); return 0; } #ifdef CONFIG_PM_SLEEP /* - * tpm_st33_i2c_pm_suspend suspend the TPM device + * tpm_stm_i2c_pm_suspend suspend the TPM device * @param: client, the i2c_client drescription (TPM I2C description). * @param: mesg, the power management message. * @return: 0 in case of success. */ -static int tpm_st33_i2c_pm_suspend(struct device *dev) +static int tpm_stm_i2c_pm_suspend(struct device *dev) { struct st33zp24_platform_data *pin_infos = dev->platform_data; int ret = 0; - if (power_mgt) { + if (gpio_is_valid(pin_infos->io_lpcpd)) gpio_set_value(pin_infos->io_lpcpd, 0); - } else { + else ret = tpm_pm_suspend(dev); - } + return ret; -} /* tpm_st33_i2c_suspend() */ +} /* tpm_stm_i2c_suspend() */ /* - * tpm_st33_i2c_pm_resume resume the TPM device + * tpm_stm_i2c_pm_resume resume the TPM device * @param: client, the i2c_client drescription (TPM I2C description). * @return: 0 in case of success. */ -static int tpm_st33_i2c_pm_resume(struct device *dev) +static int tpm_stm_i2c_pm_resume(struct device *dev) { struct tpm_chip *chip = dev_get_drvdata(dev); struct st33zp24_platform_data *pin_infos = dev->platform_data; int ret = 0; - if (power_mgt) { + if (gpio_is_valid(pin_infos->io_lpcpd)) { gpio_set_value(pin_infos->io_lpcpd, 1); - ret = wait_for_serirq_timeout(chip, - (chip->ops->status(chip) & - TPM_STS_VALID) == TPM_STS_VALID, - chip->vendor.timeout_b); + ret = wait_for_stat(chip, + TPM_STS_VALID, chip->vendor.timeout_b, + &chip->vendor.read_queue, false); } else { ret = tpm_pm_resume(dev); if (!ret) tpm_do_selftest(chip); } return ret; -} /* tpm_st33_i2c_pm_resume() */ +} /* tpm_stm_i2c_pm_resume() */ #endif -static const struct i2c_device_id tpm_st33_i2c_id[] = { +static const struct i2c_device_id tpm_stm_i2c_id[] = { {TPM_ST33_I2C, 0}, {} }; -MODULE_DEVICE_TABLE(i2c, tpm_st33_i2c_id); -static SIMPLE_DEV_PM_OPS(tpm_st33_i2c_ops, tpm_st33_i2c_pm_suspend, - tpm_st33_i2c_pm_resume); -static struct i2c_driver tpm_st33_i2c_driver = { +MODULE_DEVICE_TABLE(i2c, tpm_stm_i2c_id); + +#ifdef CONFIG_OF +static const struct of_device_id of_st33zp24_i2c_match[] = { + { .compatible = "st,st33zp24-i2c", }, + {} +}; +MODULE_DEVICE_TABLE(of, of_st33zp24_i2c_match); +#endif + +static SIMPLE_DEV_PM_OPS(tpm_stm_i2c_ops, tpm_stm_i2c_pm_suspend, + tpm_stm_i2c_pm_resume); + +static struct i2c_driver tpm_stm_i2c_driver = { .driver = { - .owner = THIS_MODULE, - .name = TPM_ST33_I2C, - .pm = &tpm_st33_i2c_ops, - }, - .probe = tpm_st33_i2c_probe, - .remove = tpm_st33_i2c_remove, - .id_table = tpm_st33_i2c_id + .owner = THIS_MODULE, + .name = TPM_ST33_I2C, + .pm = &tpm_stm_i2c_ops, + .of_match_table = of_match_ptr(of_st33zp24_i2c_match), + }, + .probe = tpm_stm_i2c_probe, + .remove = tpm_stm_i2c_remove, + .id_table = tpm_stm_i2c_id }; -module_i2c_driver(tpm_st33_i2c_driver); +module_i2c_driver(tpm_stm_i2c_driver); MODULE_AUTHOR("Christophe Ricard (tpmsupport@st.com)"); MODULE_DESCRIPTION("STM TPM I2C ST33 Driver"); -MODULE_VERSION("1.2.0"); +MODULE_VERSION("1.2.1"); MODULE_LICENSE("GPL"); diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.h b/drivers/char/tpm/tpm_i2c_stm_st33.h deleted file mode 100644 index 439a43249aa6..000000000000 --- a/drivers/char/tpm/tpm_i2c_stm_st33.h +++ /dev/null @@ -1,61 +0,0 @@ -/* - * STMicroelectronics TPM I2C Linux driver for TPM ST33ZP24 - * Copyright (C) 2009, 2010 STMicroelectronics - * - * 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; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * - * STMicroelectronics version 1.2.0, Copyright (C) 2010 - * STMicroelectronics comes with ABSOLUTELY NO WARRANTY. - * This is free software, and you are welcome to redistribute it - * under certain conditions. - * - * @Author: Christophe RICARD tpmsupport@st.com - * - * @File: stm_st33_tpm_i2c.h - * - * @Date: 09/15/2010 - */ -#ifndef __STM_ST33_TPM_I2C_MAIN_H__ -#define __STM_ST33_TPM_I2C_MAIN_H__ - -#define TPM_ACCESS (0x0) -#define TPM_STS (0x18) -#define TPM_HASH_END (0x20) -#define TPM_DATA_FIFO (0x24) -#define TPM_HASH_DATA (0x24) -#define TPM_HASH_START (0x28) -#define TPM_INTF_CAPABILITY (0x14) -#define TPM_INT_STATUS (0x10) -#define TPM_INT_ENABLE (0x08) - -#define TPM_DUMMY_BYTE 0xAA -#define TPM_WRITE_DIRECTION 0x80 -#define TPM_HEADER_SIZE 10 -#define TPM_BUFSIZE 2048 - -#define LOCALITY0 0 - -#define TPM_ST33_I2C "st33zp24_i2c" - -struct st33zp24_platform_data { - int io_serirq; - int io_lpcpd; - struct i2c_client *client; - u8 *tpm_i2c_buffer[2]; /* 0 Request 1 Response */ - struct completion irq_detection; - struct mutex lock; -}; - -#endif /* __STM_ST33_TPM_I2C_MAIN_H__ */ diff --git a/drivers/char/tpm/tpm_ibmvtpm.c b/drivers/char/tpm/tpm_ibmvtpm.c index af74c57e5090..b1e53e3aece5 100644 --- a/drivers/char/tpm/tpm_ibmvtpm.c +++ b/drivers/char/tpm/tpm_ibmvtpm.c @@ -1,7 +1,7 @@ /* * Copyright (C) 2012 IBM Corporation * - * Author: Ashley Lai <adlai@us.ibm.com> + * Author: Ashley Lai <ashleydlai@gmail.com> * * Maintained by: <tpmdd-devel@lists.sourceforge.net> * @@ -148,7 +148,8 @@ static int tpm_ibmvtpm_send(struct tpm_chip *chip, u8 *buf, size_t count) crq.len = (u16)count; crq.data = ibmvtpm->rtce_dma_handle; - rc = ibmvtpm_send_crq(ibmvtpm->vdev, word[0], word[1]); + rc = ibmvtpm_send_crq(ibmvtpm->vdev, cpu_to_be64(word[0]), + cpu_to_be64(word[1])); if (rc != H_SUCCESS) { dev_err(ibmvtpm->dev, "tpm_ibmvtpm_send failed rc=%d\n", rc); rc = 0; @@ -186,7 +187,8 @@ static int ibmvtpm_crq_get_rtce_size(struct ibmvtpm_dev *ibmvtpm) crq.valid = (u8)IBMVTPM_VALID_CMD; crq.msg = (u8)VTPM_GET_RTCE_BUFFER_SIZE; - rc = ibmvtpm_send_crq(ibmvtpm->vdev, buf[0], buf[1]); + rc = ibmvtpm_send_crq(ibmvtpm->vdev, cpu_to_be64(buf[0]), + cpu_to_be64(buf[1])); if (rc != H_SUCCESS) dev_err(ibmvtpm->dev, "ibmvtpm_crq_get_rtce_size failed rc=%d\n", rc); @@ -212,7 +214,8 @@ static int ibmvtpm_crq_get_version(struct ibmvtpm_dev *ibmvtpm) crq.valid = (u8)IBMVTPM_VALID_CMD; crq.msg = (u8)VTPM_GET_VERSION; - rc = ibmvtpm_send_crq(ibmvtpm->vdev, buf[0], buf[1]); + rc = ibmvtpm_send_crq(ibmvtpm->vdev, cpu_to_be64(buf[0]), + cpu_to_be64(buf[1])); if (rc != H_SUCCESS) dev_err(ibmvtpm->dev, "ibmvtpm_crq_get_version failed rc=%d\n", rc); @@ -270,8 +273,11 @@ 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 +296,6 @@ static int tpm_ibmvtpm_remove(struct vio_dev *vdev) kfree(ibmvtpm->rtce_buf); } - tpm_remove_hardware(ibmvtpm->dev); - kfree(ibmvtpm); return 0; @@ -307,6 +311,14 @@ static int tpm_ibmvtpm_remove(struct vio_dev *vdev) static unsigned long tpm_ibmvtpm_get_desired_dma(struct vio_dev *vdev) { struct ibmvtpm_dev *ibmvtpm = ibmvtpm_get_data(&vdev->dev); + + /* ibmvtpm initializes at probe time, so the data we are + * asking for may not be set yet. Estimate that 4K required + * for TCE-mapped buffer in addition to CRQ. + */ + if (!ibmvtpm) + return CRQ_RES_BUF_SIZE + PAGE_SIZE; + return CRQ_RES_BUF_SIZE + ibmvtpm->rtce_size; } @@ -327,7 +339,8 @@ static int tpm_ibmvtpm_suspend(struct device *dev) crq.valid = (u8)IBMVTPM_VALID_CMD; crq.msg = (u8)VTPM_PREPARE_TO_SUSPEND; - rc = ibmvtpm_send_crq(ibmvtpm->vdev, buf[0], buf[1]); + rc = ibmvtpm_send_crq(ibmvtpm->vdev, cpu_to_be64(buf[0]), + cpu_to_be64(buf[1])); if (rc != H_SUCCESS) dev_err(ibmvtpm->dev, "tpm_ibmvtpm_suspend failed rc=%d\n", rc); @@ -472,11 +485,11 @@ static void ibmvtpm_crq_process(struct ibmvtpm_crq *crq, case IBMVTPM_VALID_CMD: switch (crq->msg) { case VTPM_GET_RTCE_BUFFER_SIZE_RES: - if (crq->len <= 0) { + if (be16_to_cpu(crq->len) <= 0) { dev_err(ibmvtpm->dev, "Invalid rtce size\n"); return; } - ibmvtpm->rtce_size = crq->len; + ibmvtpm->rtce_size = be16_to_cpu(crq->len); ibmvtpm->rtce_buf = kmalloc(ibmvtpm->rtce_size, GFP_KERNEL); if (!ibmvtpm->rtce_buf) { @@ -497,11 +510,11 @@ static void ibmvtpm_crq_process(struct ibmvtpm_crq *crq, return; case VTPM_GET_VERSION_RES: - ibmvtpm->vtpm_version = crq->data; + ibmvtpm->vtpm_version = be32_to_cpu(crq->data); return; case VTPM_TPM_COMMAND_RES: /* len of the data in rtce buffer */ - ibmvtpm->res_len = crq->len; + ibmvtpm->res_len = be16_to_cpu(crq->len); wake_up_interruptible(&ibmvtpm->wq); return; default: @@ -555,11 +568,9 @@ 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) { @@ -629,7 +640,7 @@ 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); @@ -644,8 +655,6 @@ cleanup: kfree(ibmvtpm); } - tpm_remove_hardware(dev); - return rc; } diff --git a/drivers/char/tpm/tpm_ibmvtpm.h b/drivers/char/tpm/tpm_ibmvtpm.h index bd82a791f995..f595f14426bf 100644 --- a/drivers/char/tpm/tpm_ibmvtpm.h +++ b/drivers/char/tpm/tpm_ibmvtpm.h @@ -1,7 +1,7 @@ /* * Copyright (C) 2012 IBM Corporation * - * Author: Ashley Lai <adlai@us.ibm.com> + * Author: Ashley Lai <ashleydlai@gmail.com> * * Maintained by: <tpmdd-devel@lists.sourceforge.net> * diff --git a/drivers/char/tpm/tpm_infineon.c b/drivers/char/tpm/tpm_infineon.c index dc0a2554034e..6d492132ad2b 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; } @@ -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 4d0a17ea8cde..289389ecef84 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); @@ -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); @@ -307,11 +306,16 @@ 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_of.c b/drivers/char/tpm/tpm_of.c index 98ba2bd1a355..c002d1bd9caf 100644 --- a/drivers/char/tpm/tpm_of.c +++ b/drivers/char/tpm/tpm_of.c @@ -1,7 +1,7 @@ /* * Copyright 2012 IBM Corporation * - * Author: Ashley Lai <adlai@us.ibm.com> + * Author: Ashley Lai <ashleydlai@gmail.com> * * Maintained by: <tpmdd-devel@lists.sourceforge.net> * diff --git a/drivers/char/tpm/tpm_ppi.c b/drivers/char/tpm/tpm_ppi.c index 61dcc8011ec7..6ca9b5d78144 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 <xiaoyan.zhang@intel.com> + * Jiang Liu <jiang.liu@linux.intel.com> + * Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> + * + * Maintained by: <tpmdd-devel@lists.sourceforge.net> + * + * 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->pdev->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->pdev->kobj, &ppi_attr_grp); } diff --git a/drivers/char/tpm/tpm_tis.c b/drivers/char/tpm/tpm_tis.c index 6f1985496112..f2dffa770b8e 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 <leendert@watson.ibm.com> @@ -64,19 +65,30 @@ 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)) #define TPM_RID(l) (0x0F04 | ((l) << 12)) -static LIST_HEAD(tis_chips); -static DEFINE_MUTEX(tis_lock); +struct priv_data { + bool irq_tested; +}; #if defined(CONFIG_PNP) && defined(CONFIG_ACPI) static int is_itpm(struct pnp_dev *dev) @@ -241,7 +253,7 @@ 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; } @@ -254,7 +266,7 @@ 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; } @@ -263,7 +275,7 @@ 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; } @@ -338,15 +350,31 @@ out_err: return rc; } +static void disable_interrupts(struct tpm_chip *chip) +{ + u32 intmask; + + intmask = + ioread32(chip->vendor.iobase + + TPM_INT_ENABLE(chip->vendor.locality)); + intmask &= ~TPM_GLOBAL_INT_ENABLE; + iowrite32(intmask, + chip->vendor.iobase + + TPM_INT_ENABLE(chip->vendor.locality)); + free_irq(chip->vendor.irq, chip); + chip->vendor.irq = 0; +} + /* * If interrupts are used (signaled by an irq set in the vendor structure) * tpm.c can skip polling for the data to be available as the interrupt is * waited for here */ -static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len) +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) @@ -358,9 +386,14 @@ static int tpm_tis_send(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; @@ -373,6 +406,30 @@ out_err: return rc; } +static int tpm_tis_send(struct tpm_chip *chip, u8 *buf, size_t len) +{ + int rc, irq; + struct priv_data *priv = chip->vendor.priv; + + if (!chip->vendor.irq || priv->irq_tested) + return tpm_tis_send_main(chip, buf, len); + + /* Verify receipt of the expected IRQ */ + irq = chip->vendor.irq; + chip->vendor.irq = 0; + rc = tpm_tis_send_main(chip, buf, len); + chip->vendor.irq = irq; + if (!priv->irq_tested) + msleep(1); + if (!priv->irq_tested) { + disable_interrupts(chip); + dev_err(chip->pdev, + FW_BUG "TPM interrupt not working, polling instead\n"); + } + priv->irq_tested = true; + return rc; +} + struct tis_vendor_timeout_override { u32 did_vid; unsigned long timeout_us[4]; @@ -436,7 +493,7 @@ 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; @@ -505,6 +562,7 @@ static irqreturn_t tis_int_handler(int dummy, void *dev_id) if (interrupt == 0) return IRQ_NONE; + ((struct priv_data *)chip->vendor.priv)->irq_tested = true; if (interrupt & TPM_INTF_DATA_AVAIL_INT) wake_up_interruptible(&chip->vendor.read_queue); if (interrupt & TPM_INTF_LOCALITY_CHANGE_INT) @@ -528,27 +586,51 @@ static bool interrupts = true; module_param(interrupts, bool, 0444); MODULE_PARM_DESC(interrupts, "Enable interrupts"); -static int tpm_tis_init(struct device *dev, resource_size_t start, - resource_size_t len, unsigned int irq) +static void tpm_tis_remove(struct tpm_chip *chip) +{ + if (chip->flags & TPM_CHIP_FLAG_TPM2) + tpm2_shutdown(chip, TPM2_SU_CLEAR); + + 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, 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; struct tpm_chip *chip; + struct priv_data *priv; - if (!(chip = tpm_register_hardware(dev, &tpm_tis))) - return -ENODEV; + priv = devm_kzalloc(dev, sizeof(struct priv_data), GFP_KERNEL); + if (priv == NULL) + return -ENOMEM; - chip->vendor.iobase = ioremap(start, len); - if (!chip->vendor.iobase) { - rc = -EIO; - goto out_err; - } + chip = tpmm_chip_alloc(dev, &tpm_tis); + if (IS_ERR(chip)) + 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; @@ -560,11 +642,15 @@ static int tpm_tis_init(struct device *dev, resource_size_t start, goto out_err; } + rc = tpm2_probe(chip); + if (rc) + goto out_err; + 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) { @@ -605,19 +691,6 @@ static int tpm_tis_init(struct device *dev, resource_size_t start, if (intfcaps & TPM_INTF_DATA_AVAIL_INT) dev_dbg(dev, "\tData Avail Int Support\n"); - /* get the timeouts before testing for irqs */ - 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; - } - /* INTERRUPT Setup */ init_waitqueue_head(&chip->vendor.read_queue); init_waitqueue_head(&chip->vendor.int_queue); @@ -649,10 +722,10 @@ 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, - chip->vendor.miscdev.name, chip) != 0) { - dev_info(chip->dev, + if (devm_request_irq + (dev, i, tis_int_probe, IRQF_SHARED, + chip->devname, chip) != 0) { + dev_info(chip->pdev, "Unable to request irq: %d for probe\n", i); continue; @@ -673,7 +746,10 @@ static int tpm_tis_init(struct device *dev, resource_size_t start, chip->vendor.probed_irq = 0; /* Generate Interrupts */ - tpm_gen_interrupt(chip); + if (chip->flags & TPM_CHIP_FLAG_TPM2) + tpm2_gen_interrupt(chip); + else + tpm_gen_interrupt(chip); chip->vendor.irq = chip->vendor.probed_irq; @@ -690,17 +766,16 @@ 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, - chip->vendor.miscdev.name, chip) != 0) { - dev_info(chip->dev, + if (devm_request_irq + (dev, chip->vendor.irq, tis_int_handler, IRQF_SHARED, + chip->devname, chip) != 0) { + dev_info(chip->pdev, "Unable to request irq: %d for use\n", chip->vendor.irq); chip->vendor.irq = 0; @@ -719,17 +794,49 @@ static int tpm_tis_init(struct device *dev, resource_size_t start, } } - INIT_LIST_HEAD(&chip->vendor.list); - mutex_lock(&tis_lock); - list_add(&chip->vendor.list, &tis_chips); - mutex_unlock(&tis_lock); + 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 (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 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; } @@ -764,10 +871,16 @@ static int tpm_tis_resume(struct device *dev) tpm_tis_reenable_interrupts(chip); ret = tpm_pm_resume(dev); - if (!ret) + if (ret) + return ret; + + /* TPM 1.2 requires self-test on resume. This function actually returns + * an error code but for unknown reason it isn't handled. + */ + if (!(chip->flags & TPM_CHIP_FLAG_TPM2)) tpm_do_selftest(chip); - return ret; + return 0; } #endif @@ -779,6 +892,7 @@ 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); @@ -791,7 +905,12 @@ 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); +#ifdef CONFIG_ACPI + if (pnp_acpi_device(pnp_dev)) + acpi_dev_handle = pnp_acpi_device(pnp_dev)->handle; +#endif + + return tpm_tis_init(&pnp_dev->dev, acpi_dev_handle, start, len, irq); } static struct pnp_device_id tpm_pnp_tbl[] = { @@ -811,13 +930,10 @@ 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, @@ -836,7 +952,7 @@ 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", .pm = &tpm_tis_pm, }, }; @@ -862,7 +978,7 @@ 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; @@ -875,31 +991,16 @@ 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 441b44e54226..c3b4f5a5ac10 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; |