Index: root/xen-unstable.hg/linux-2.6-xen-sparse/drivers/char/tpm/Kconfig =================================================================== --- root.orig/xen-unstable.hg/linux-2.6-xen-sparse/drivers/char/tpm/Kconfig +++ root/xen-unstable.hg/linux-2.6-xen-sparse/drivers/char/tpm/Kconfig @@ -22,7 +22,7 @@ config TCG_TPM config TCG_TIS tristate "TPM Interface Specification 1.2 Interface" - depends on TCG_TPM + depends on TCG_TPM && PNPACPI ---help--- If you have a TPM security chip that is compliant with the TCG TIS 1.2 TPM specification say Yes and it will be accessible Index: root/xen-unstable.hg/linux-2.6-xen-sparse/drivers/char/tpm/tpm.h =================================================================== --- root.orig/xen-unstable.hg/linux-2.6-xen-sparse/drivers/char/tpm/tpm.h +++ root/xen-unstable.hg/linux-2.6-xen-sparse/drivers/char/tpm/tpm.h @@ -26,13 +26,6 @@ #include #include -#ifdef CONFIG_XEN -enum tpm_bufsize { - TPM_MIN_BUFFERSIZE = 2048, - TPM_MAX_BUFFERSIZE = 64 * 1024, -}; -#endif - enum tpm_timeout { TPM_TIMEOUT = 5, /* msecs */ }; @@ -68,9 +61,6 @@ struct tpm_vendor_specific { const u8 req_complete_mask; const u8 req_complete_val; const u8 req_canceled; -#ifdef CONFIG_XEN - u32 buffersize; -#endif void __iomem *iobase; /* ioremapped address */ unsigned long base; /* TPM base address */ @@ -104,9 +94,6 @@ struct tpm_chip { /* Data passed to and from the tpm via the read/write calls */ u8 *data_buffer; atomic_t data_pending; -#ifdef CONFIG_XEN - atomic_t data_position; -#endif struct semaphore buffer_mutex; struct timer_list user_read_timer; /* user needs to claim result */ @@ -138,17 +125,6 @@ static inline void tpm_write_index(int b } #ifdef CONFIG_XEN -static inline u32 get_chip_buffersize(struct tpm_chip *chip) -{ - u32 size = chip->vendor.buffersize; - if (size > TPM_MAX_BUFFERSIZE) { - return TPM_MAX_BUFFERSIZE; - } else if (size < TPM_MIN_BUFFERSIZE) { - return TPM_MIN_BUFFERSIZE; - } - return size; -} - static inline void *chip_get_private(const struct tpm_chip *chip) { return chip->priv; Index: root/xen-unstable.hg/linux-2.6-xen-sparse/drivers/char/tpm/tpm_vtpm.c =================================================================== --- root.orig/xen-unstable.hg/linux-2.6-xen-sparse/drivers/char/tpm/tpm_vtpm.c +++ root/xen-unstable.hg/linux-2.6-xen-sparse/drivers/char/tpm/tpm_vtpm.c @@ -519,9 +519,6 @@ struct tpm_chip *init_vtpm(struct device vtpms->tpmvd = tvd; vtpms->tpm_private = tp; - if (tvd) - tpm_vtpm.buffersize = tvd->max_tx_size; - chip = tpm_register_hardware(dev, &tpm_vtpm); if (!chip) { rc = -ENODEV; Index: root/xen-unstable.hg/linux-2.6-xen-sparse/drivers/char/tpm/tpm.c =================================================================== --- root.orig/xen-unstable.hg/linux-2.6-xen-sparse/drivers/char/tpm/tpm.c +++ /dev/null @@ -1,1222 +0,0 @@ -/* - * Copyright (C) 2004 IBM Corporation - * - * Authors: - * Leendert van Doorn - * Dave Safford - * Reiner Sailer - * Kylene Hall - * - * Maintained by: - * - * Device driver for TCG/TCPA TPM (trusted platform module). - * 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. - * - * Note, the TPM chip is not interrupt driven (only polling) - * and can have very long timeouts (minutes!). Hence the unusual - * calls to msleep. - * - */ - -#include -#include -#include -#include "tpm.h" - -enum tpm_const { - TPM_MINOR = 224, /* officially assigned */ -#ifndef CONFIG_XEN - TPM_BUFSIZE = 2048, -#endif - TPM_NUM_DEVICES = 256, -}; - -enum tpm_duration { - TPM_SHORT = 0, - TPM_MEDIUM = 1, - TPM_LONG = 2, - TPM_UNDEFINED, -}; - -#define TPM_MAX_ORDINAL 243 -#define TPM_MAX_PROTECTED_ORDINAL 12 -#define TPM_PROTECTED_ORDINAL_MASK 0xFF - -static LIST_HEAD(tpm_chip_list); -static DEFINE_SPINLOCK(driver_lock); -static DECLARE_BITMAP(dev_mask, TPM_NUM_DEVICES); - -/* - * Array with one entry per ordinal defining the maximum amount - * of time the chip could take to return the result. The ordinal - * designation of short, medium or long is defined in a table in - * TCG Specification TPM Main Part 2 TPM Structures Section 17. The - * values of the SHORT, MEDIUM, and LONG durations are retrieved - * from the chip during initialization with a call to tpm_get_timeouts. - */ -static const u8 tpm_protected_ordinal_duration[TPM_MAX_PROTECTED_ORDINAL] = { - TPM_UNDEFINED, /* 0 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, /* 5 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, /* 10 */ - TPM_SHORT, -}; - -static const u8 tpm_ordinal_duration[TPM_MAX_ORDINAL] = { - TPM_UNDEFINED, /* 0 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, /* 5 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, /* 10 */ - TPM_SHORT, - TPM_MEDIUM, - TPM_LONG, - TPM_LONG, - TPM_MEDIUM, /* 15 */ - TPM_SHORT, - TPM_SHORT, - TPM_MEDIUM, - TPM_LONG, - TPM_SHORT, /* 20 */ - TPM_SHORT, - TPM_MEDIUM, - TPM_MEDIUM, - TPM_MEDIUM, - TPM_SHORT, /* 25 */ - TPM_SHORT, - TPM_MEDIUM, - TPM_SHORT, - TPM_SHORT, - TPM_MEDIUM, /* 30 */ - TPM_LONG, - TPM_MEDIUM, - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, /* 35 */ - TPM_MEDIUM, - TPM_MEDIUM, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_MEDIUM, /* 40 */ - TPM_LONG, - TPM_MEDIUM, - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, /* 45 */ - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, - TPM_LONG, - TPM_MEDIUM, /* 50 */ - TPM_MEDIUM, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, /* 55 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_MEDIUM, /* 60 */ - TPM_MEDIUM, - TPM_MEDIUM, - TPM_SHORT, - TPM_SHORT, - TPM_MEDIUM, /* 65 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, /* 70 */ - TPM_SHORT, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, /* 75 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_LONG, /* 80 */ - TPM_UNDEFINED, - TPM_MEDIUM, - TPM_LONG, - TPM_SHORT, - TPM_UNDEFINED, /* 85 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, /* 90 */ - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, - TPM_UNDEFINED, /* 95 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_MEDIUM, /* 100 */ - TPM_SHORT, - TPM_SHORT, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, /* 105 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, /* 110 */ - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, /* 115 */ - TPM_SHORT, - TPM_SHORT, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_LONG, /* 120 */ - TPM_LONG, - TPM_MEDIUM, - TPM_UNDEFINED, - TPM_SHORT, - TPM_SHORT, /* 125 */ - TPM_SHORT, - TPM_LONG, - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, /* 130 */ - TPM_MEDIUM, - TPM_UNDEFINED, - TPM_SHORT, - TPM_MEDIUM, - TPM_UNDEFINED, /* 135 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, /* 140 */ - TPM_SHORT, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, /* 145 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, /* 150 */ - TPM_MEDIUM, - TPM_MEDIUM, - TPM_SHORT, - TPM_SHORT, - TPM_UNDEFINED, /* 155 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, /* 160 */ - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, - TPM_UNDEFINED, - TPM_UNDEFINED, /* 165 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_LONG, /* 170 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, /* 175 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_MEDIUM, /* 180 */ - TPM_SHORT, - TPM_MEDIUM, - TPM_MEDIUM, - TPM_MEDIUM, - TPM_MEDIUM, /* 185 */ - TPM_SHORT, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, /* 190 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, /* 195 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, /* 200 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, - TPM_SHORT, /* 205 */ - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, - TPM_MEDIUM, /* 210 */ - TPM_UNDEFINED, - TPM_MEDIUM, - TPM_MEDIUM, - TPM_MEDIUM, - TPM_UNDEFINED, /* 215 */ - TPM_MEDIUM, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, - TPM_SHORT, /* 220 */ - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, - TPM_SHORT, - TPM_UNDEFINED, /* 225 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, /* 230 */ - TPM_LONG, - TPM_MEDIUM, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, /* 235 */ - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_UNDEFINED, - TPM_SHORT, /* 240 */ - TPM_UNDEFINED, - TPM_MEDIUM, -}; - -static void user_reader_timeout(unsigned long ptr) -{ - struct tpm_chip *chip = (struct tpm_chip *) ptr; - - schedule_work(&chip->work); -} - -static void timeout_work(void *ptr) -{ - struct tpm_chip *chip = ptr; - - down(&chip->buffer_mutex); - atomic_set(&chip->data_pending, 0); -#ifndef CONFIG_XEN - memset(chip->data_buffer, 0, TPM_BUFSIZE); -#else - memset(chip->data_buffer, 0, get_chip_buffersize(chip)); -#endif - up(&chip->buffer_mutex); -} - -/* - * Returns max number of jiffies to wait - */ -unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip, - u32 ordinal) -{ - int duration_idx = TPM_UNDEFINED; - int duration = 0; - - if (ordinal < TPM_MAX_ORDINAL) - duration_idx = tpm_ordinal_duration[ordinal]; - else if ((ordinal & TPM_PROTECTED_ORDINAL_MASK) < - TPM_MAX_PROTECTED_ORDINAL) - duration_idx = - tpm_protected_ordinal_duration[ordinal & - TPM_PROTECTED_ORDINAL_MASK]; - - if (duration_idx != TPM_UNDEFINED) - duration = chip->vendor.duration[duration_idx]; - if (duration <= 0) - return 2 * 60 * HZ; - else - return duration; -} -EXPORT_SYMBOL_GPL(tpm_calc_ordinal_duration); - -/* - * Internal kernel interface to transmit TPM commands - */ -static ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf, - size_t bufsiz) -{ - ssize_t rc; - u32 count, ordinal; - unsigned long stop; - - count = be32_to_cpu(*((__be32 *) (buf + 2))); - ordinal = be32_to_cpu(*((__be32 *) (buf + 6))); - if (count == 0) - return -ENODATA; - if (count > bufsiz) { - dev_err(chip->dev, - "invalid count value %x %zx \n", count, bufsiz); - return -E2BIG; - } - - down(&chip->tpm_mutex); - - if ((rc = chip->vendor.send(chip, (u8 *) buf, count)) < 0) { - dev_err(chip->dev, - "tpm_transmit: tpm_send: error %zd\n", rc); - goto out; - } - - if (chip->vendor.irq) - goto out_recv; - - stop = jiffies + tpm_calc_ordinal_duration(chip, ordinal); - do { - u8 status = chip->vendor.status(chip); - if ((status & chip->vendor.req_complete_mask) == - chip->vendor.req_complete_val) - goto out_recv; - - if ((status == chip->vendor.req_canceled)) { - dev_err(chip->dev, "Operation Canceled\n"); - rc = -ECANCELED; - goto out; - } - - msleep(TPM_TIMEOUT); /* CHECK */ - rmb(); - } while (time_before(jiffies, stop)); - - chip->vendor.cancel(chip); - dev_err(chip->dev, "Operation Timed out\n"); - rc = -ETIME; - goto out; - -out_recv: - rc = chip->vendor.recv(chip, (u8 *) buf, bufsiz); - if (rc < 0) - dev_err(chip->dev, - "tpm_transmit: tpm_recv: error %zd\n", rc); -out: - up(&chip->tpm_mutex); - return rc; -} - -#define TPM_DIGEST_SIZE 20 -#define TPM_ERROR_SIZE 10 -#define TPM_RET_CODE_IDX 6 -#define TPM_GET_CAP_RET_SIZE_IDX 10 -#define TPM_GET_CAP_RET_UINT32_1_IDX 14 -#define TPM_GET_CAP_RET_UINT32_2_IDX 18 -#define TPM_GET_CAP_RET_UINT32_3_IDX 22 -#define TPM_GET_CAP_RET_UINT32_4_IDX 26 -#define TPM_GET_CAP_PERM_DISABLE_IDX 16 -#define TPM_GET_CAP_PERM_INACTIVE_IDX 18 -#define TPM_GET_CAP_RET_BOOL_1_IDX 14 -#define TPM_GET_CAP_TEMP_INACTIVE_IDX 16 - -#define TPM_CAP_IDX 13 -#define TPM_CAP_SUBCAP_IDX 21 - -enum tpm_capabilities { - TPM_CAP_FLAG = 4, - TPM_CAP_PROP = 5, -}; - -enum tpm_sub_capabilities { - TPM_CAP_PROP_PCR = 0x1, - TPM_CAP_PROP_MANUFACTURER = 0x3, - TPM_CAP_FLAG_PERM = 0x8, - TPM_CAP_FLAG_VOL = 0x9, - TPM_CAP_PROP_OWNER = 0x11, - TPM_CAP_PROP_TIS_TIMEOUT = 0x15, - TPM_CAP_PROP_TIS_DURATION = 0x20, -}; - -/* - * This is a semi generic GetCapability command for use - * with the capability type TPM_CAP_PROP or TPM_CAP_FLAG - * and their associated sub_capabilities. - */ - -static const u8 tpm_cap[] = { - 0, 193, /* TPM_TAG_RQU_COMMAND */ - 0, 0, 0, 22, /* length */ - 0, 0, 0, 101, /* TPM_ORD_GetCapability */ - 0, 0, 0, 0, /* TPM_CAP_ */ - 0, 0, 0, 4, /* TPM_CAP_SUB_ size */ - 0, 0, 1, 0 /* TPM_CAP_SUB_ */ -}; - -static ssize_t transmit_cmd(struct tpm_chip *chip, u8 *data, int len, - char *desc) -{ - int err; - - len = tpm_transmit(chip, data, len); - if (len < 0) - return len; - if (len == TPM_ERROR_SIZE) { - err = be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX))); - dev_dbg(chip->dev, "A TPM error (%d) occurred %s\n", err, desc); - return err; - } - return 0; -} - -void tpm_gen_interrupt(struct tpm_chip *chip) -{ - u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 30)]; - ssize_t rc; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_TIMEOUT; - - rc = transmit_cmd(chip, data, sizeof(data), - "attempting to determine the timeouts"); -} -EXPORT_SYMBOL_GPL(tpm_gen_interrupt); - -void tpm_get_timeouts(struct tpm_chip *chip) -{ - u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 30)]; - ssize_t rc; - u32 timeout; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_TIMEOUT; - - rc = transmit_cmd(chip, data, sizeof(data), - "attempting to determine the timeouts"); - if (rc) - goto duration; - - if (be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_SIZE_IDX))) - != 4 * sizeof(u32)) - goto duration; - - /* Don't overwrite default if value is 0 */ - timeout = - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX))); - if (timeout) - chip->vendor.timeout_a = msecs_to_jiffies(timeout); - timeout = - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_2_IDX))); - if (timeout) - chip->vendor.timeout_b = msecs_to_jiffies(timeout); - timeout = - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_3_IDX))); - if (timeout) - chip->vendor.timeout_c = msecs_to_jiffies(timeout); - timeout = - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_4_IDX))); - if (timeout) - chip->vendor.timeout_d = msecs_to_jiffies(timeout); - -duration: - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_TIS_DURATION; - - rc = transmit_cmd(chip, data, sizeof(data), - "attempting to determine the durations"); - if (rc) - return; - - if (be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_SIZE_IDX))) - != 3 * sizeof(u32)) - return; - - chip->vendor.duration[TPM_SHORT] = - msecs_to_jiffies(be32_to_cpu - (*((__be32 *) (data + - TPM_GET_CAP_RET_UINT32_1_IDX)))); - chip->vendor.duration[TPM_MEDIUM] = - msecs_to_jiffies(be32_to_cpu - (*((__be32 *) (data + - TPM_GET_CAP_RET_UINT32_2_IDX)))); - chip->vendor.duration[TPM_LONG] = - msecs_to_jiffies(be32_to_cpu - (*((__be32 *) (data + - TPM_GET_CAP_RET_UINT32_3_IDX)))); -} -EXPORT_SYMBOL_GPL(tpm_get_timeouts); - -void tpm_continue_selftest(struct tpm_chip *chip) -{ - u8 data[] = { - 0, 193, /* TPM_TAG_RQU_COMMAND */ - 0, 0, 0, 10, /* length */ - 0, 0, 0, 83, /* TPM_ORD_GetCapability */ - }; - - tpm_transmit(chip, data, sizeof(data)); -} -EXPORT_SYMBOL_GPL(tpm_continue_selftest); - -ssize_t tpm_show_enabled(struct device * dev, struct device_attribute * attr, - char *buf) -{ - u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 35)]; - ssize_t rc; - - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_FLAG; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_PERM; - - rc = transmit_cmd(chip, data, sizeof(data), - "attemtping to determine the permanent state"); - if (rc) - return 0; - return sprintf(buf, "%d\n", !data[TPM_GET_CAP_PERM_DISABLE_IDX]); -} -EXPORT_SYMBOL_GPL(tpm_show_enabled); - -ssize_t tpm_show_active(struct device * dev, struct device_attribute * attr, - char *buf) -{ - u8 data[max_t(int, ARRAY_SIZE(tpm_cap), 35)]; - ssize_t rc; - - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_FLAG; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_PERM; - - rc = transmit_cmd(chip, data, sizeof(data), - "attemtping to determine the permanent state"); - if (rc) - return 0; - return sprintf(buf, "%d\n", !data[TPM_GET_CAP_PERM_INACTIVE_IDX]); -} -EXPORT_SYMBOL_GPL(tpm_show_active); - -ssize_t tpm_show_owned(struct device * dev, struct device_attribute * attr, - char *buf) -{ - u8 data[sizeof(tpm_cap)]; - ssize_t rc; - - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_OWNER; - - rc = transmit_cmd(chip, data, sizeof(data), - "attempting to determine the owner state"); - if (rc) - return 0; - return sprintf(buf, "%d\n", data[TPM_GET_CAP_RET_BOOL_1_IDX]); -} -EXPORT_SYMBOL_GPL(tpm_show_owned); - -ssize_t tpm_show_temp_deactivated(struct device * dev, - struct device_attribute * attr, char *buf) -{ - u8 data[sizeof(tpm_cap)]; - ssize_t rc; - - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_FLAG; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_FLAG_VOL; - - rc = transmit_cmd(chip, data, sizeof(data), - "attempting to determine the temporary state"); - if (rc) - return 0; - return sprintf(buf, "%d\n", data[TPM_GET_CAP_TEMP_INACTIVE_IDX]); -} -EXPORT_SYMBOL_GPL(tpm_show_temp_deactivated); - -static const u8 pcrread[] = { - 0, 193, /* TPM_TAG_RQU_COMMAND */ - 0, 0, 0, 14, /* length */ - 0, 0, 0, 21, /* TPM_ORD_PcrRead */ - 0, 0, 0, 0 /* PCR index */ -}; - -ssize_t tpm_show_pcrs(struct device *dev, struct device_attribute *attr, - char *buf) -{ - u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(pcrread)), 30)]; - ssize_t rc; - int i, j, num_pcrs; - __be32 index; - char *str = buf; - - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_PCR; - - rc = transmit_cmd(chip, data, sizeof(data), - "attempting to determine the number of PCRS"); - if (rc) - return 0; - - num_pcrs = be32_to_cpu(*((__be32 *) (data + 14))); - for (i = 0; i < num_pcrs; i++) { - memcpy(data, pcrread, sizeof(pcrread)); - index = cpu_to_be32(i); - memcpy(data + 10, &index, 4); - rc = transmit_cmd(chip, data, sizeof(data), - "attempting to read a PCR"); - if (rc) - goto out; - str += sprintf(str, "PCR-%02d: ", i); - for (j = 0; j < TPM_DIGEST_SIZE; j++) - str += sprintf(str, "%02X ", *(data + 10 + j)); - str += sprintf(str, "\n"); - } -out: - return str - buf; -} -EXPORT_SYMBOL_GPL(tpm_show_pcrs); - -#define READ_PUBEK_RESULT_SIZE 314 -static const u8 readpubek[] = { - 0, 193, /* TPM_TAG_RQU_COMMAND */ - 0, 0, 0, 30, /* length */ - 0, 0, 0, 124, /* TPM_ORD_ReadPubek */ -}; - -ssize_t tpm_show_pubek(struct device *dev, struct device_attribute *attr, - char *buf) -{ - u8 *data; - ssize_t err; - int i, rc; - char *str = buf; - - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - data = kzalloc(READ_PUBEK_RESULT_SIZE, GFP_KERNEL); - if (!data) - return -ENOMEM; - - memcpy(data, readpubek, sizeof(readpubek)); - - err = transmit_cmd(chip, data, READ_PUBEK_RESULT_SIZE, - "attempting to read the PUBEK"); - if (err) - goto out; - - /* - ignore header 10 bytes - algorithm 32 bits (1 == RSA ) - encscheme 16 bits - sigscheme 16 bits - parameters (RSA 12->bytes: keybit, #primes, expbit) - keylenbytes 32 bits - 256 byte modulus - ignore checksum 20 bytes - */ - - str += - sprintf(str, - "Algorithm: %02X %02X %02X %02X\nEncscheme: %02X %02X\n" - "Sigscheme: %02X %02X\nParameters: %02X %02X %02X %02X" - " %02X %02X %02X %02X %02X %02X %02X %02X\n" - "Modulus length: %d\nModulus: \n", - data[10], data[11], data[12], data[13], data[14], - data[15], data[16], data[17], data[22], data[23], - data[24], data[25], data[26], data[27], data[28], - data[29], data[30], data[31], data[32], data[33], - be32_to_cpu(*((__be32 *) (data + 34)))); - - for (i = 0; i < 256; i++) { - str += sprintf(str, "%02X ", data[i + 38]); - if ((i + 1) % 16 == 0) - str += sprintf(str, "\n"); - } -out: - rc = str - buf; - kfree(data); - return rc; -} -EXPORT_SYMBOL_GPL(tpm_show_pubek); - -#define CAP_VERSION_1_1 6 -#define CAP_VERSION_1_2 0x1A -#define CAP_VERSION_IDX 13 -static const u8 cap_version[] = { - 0, 193, /* TPM_TAG_RQU_COMMAND */ - 0, 0, 0, 18, /* length */ - 0, 0, 0, 101, /* TPM_ORD_GetCapability */ - 0, 0, 0, 0, - 0, 0, 0, 0 -}; - -ssize_t tpm_show_caps(struct device *dev, struct device_attribute *attr, - char *buf) -{ - u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(cap_version)), 30)]; - ssize_t rc; - char *str = buf; - - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_MANUFACTURER; - - rc = transmit_cmd(chip, data, sizeof(data), - "attempting to determine the manufacturer"); - if (rc) - return 0; - - str += sprintf(str, "Manufacturer: 0x%x\n", - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX)))); - - memcpy(data, cap_version, sizeof(cap_version)); - data[CAP_VERSION_IDX] = CAP_VERSION_1_1; - rc = transmit_cmd(chip, data, sizeof(data), - "attempting to determine the 1.1 version"); - if (rc) - goto out; - - str += sprintf(str, - "TCG version: %d.%d\nFirmware version: %d.%d\n", - (int) data[14], (int) data[15], (int) data[16], - (int) data[17]); - -out: - return str - buf; -} -EXPORT_SYMBOL_GPL(tpm_show_caps); - -ssize_t tpm_show_caps_1_2(struct device * dev, - struct device_attribute * attr, char *buf) -{ - u8 data[max_t(int, max(ARRAY_SIZE(tpm_cap), ARRAY_SIZE(cap_version)), 30)]; - ssize_t len; - char *str = buf; - - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - memcpy(data, tpm_cap, sizeof(tpm_cap)); - data[TPM_CAP_IDX] = TPM_CAP_PROP; - data[TPM_CAP_SUBCAP_IDX] = TPM_CAP_PROP_MANUFACTURER; - - if ((len = tpm_transmit(chip, data, sizeof(data))) <= - TPM_ERROR_SIZE) { - dev_dbg(chip->dev, "A TPM error (%d) occurred " - "attempting to determine the manufacturer\n", - be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX)))); - return 0; - } - - str += sprintf(str, "Manufacturer: 0x%x\n", - be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX)))); - - memcpy(data, cap_version, sizeof(cap_version)); - data[CAP_VERSION_IDX] = CAP_VERSION_1_2; - - if ((len = tpm_transmit(chip, data, sizeof(data))) <= - TPM_ERROR_SIZE) { - dev_err(chip->dev, "A TPM error (%d) occurred " - "attempting to determine the 1.2 version\n", - be32_to_cpu(*((__be32 *) (data + TPM_RET_CODE_IDX)))); - goto out; - } - str += sprintf(str, - "TCG version: %d.%d\nFirmware version: %d.%d\n", - (int) data[16], (int) data[17], (int) data[18], - (int) data[19]); - -out: - return str - buf; -} -EXPORT_SYMBOL_GPL(tpm_show_caps_1_2); - -ssize_t tpm_store_cancel(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return 0; - - chip->vendor.cancel(chip); - return count; -} -EXPORT_SYMBOL_GPL(tpm_store_cancel); - -/* - * Device file system interface to the TPM - */ -int tpm_open(struct inode *inode, struct file *file) -{ - int rc = 0, minor = iminor(inode); - struct tpm_chip *chip = NULL, *pos; - - spin_lock(&driver_lock); - - list_for_each_entry(pos, &tpm_chip_list, list) { - if (pos->vendor.miscdev.minor == minor) { - chip = pos; - break; - } - } - - if (chip == NULL) { - rc = -ENODEV; - goto err_out; - } - - if (chip->num_opens) { - dev_dbg(chip->dev, "Another process owns this TPM\n"); - rc = -EBUSY; - goto err_out; - } - - chip->num_opens++; - get_device(chip->dev); - - spin_unlock(&driver_lock); - -#ifndef CONFIG_XEN - chip->data_buffer = kmalloc(TPM_BUFSIZE * sizeof(u8), GFP_KERNEL); -#else - chip->data_buffer = kmalloc(get_chip_buffersize(chip) * sizeof(u8), - GFP_KERNEL); -#endif - if (chip->data_buffer == NULL) { - chip->num_opens--; - put_device(chip->dev); - return -ENOMEM; - } - - atomic_set(&chip->data_pending, 0); - - file->private_data = chip; - return 0; - -err_out: - spin_unlock(&driver_lock); - return rc; -} -EXPORT_SYMBOL_GPL(tpm_open); - -int tpm_release(struct inode *inode, struct file *file) -{ - struct tpm_chip *chip = file->private_data; - - spin_lock(&driver_lock); - file->private_data = NULL; - chip->num_opens--; - del_singleshot_timer_sync(&chip->user_read_timer); - flush_scheduled_work(); - atomic_set(&chip->data_pending, 0); - put_device(chip->dev); - kfree(chip->data_buffer); - spin_unlock(&driver_lock); - return 0; -} -EXPORT_SYMBOL_GPL(tpm_release); - -ssize_t tpm_write(struct file *file, const char __user *buf, - size_t size, loff_t *off) -{ - struct tpm_chip *chip = file->private_data; - int in_size = size, out_size; - - /* cannot perform a write until the read has cleared - either via tpm_read or a user_read_timer timeout */ - while (atomic_read(&chip->data_pending) != 0) - msleep(TPM_TIMEOUT); - - down(&chip->buffer_mutex); - -#ifndef CONFIG_XEN - if (in_size > TPM_BUFSIZE) - in_size = TPM_BUFSIZE; -#else - if (in_size > get_chip_buffersize(chip)) - in_size = get_chip_buffersize(chip); -#endif - - if (copy_from_user - (chip->data_buffer, (void __user *) buf, in_size)) { - up(&chip->buffer_mutex); - return -EFAULT; - } - - /* atomic tpm command send and result receive */ -#ifndef CONFIG_XEN - out_size = tpm_transmit(chip, chip->data_buffer, TPM_BUFSIZE); -#else - out_size = tpm_transmit(chip, chip->data_buffer, - get_chip_buffersize(chip)); -#endif - - atomic_set(&chip->data_pending, out_size); -#ifdef CONFIG_XEN - atomic_set(&chip->data_position, 0); -#endif - up(&chip->buffer_mutex); - - /* Set a timeout by which the reader must come claim the result */ - mod_timer(&chip->user_read_timer, jiffies + (60 * HZ)); - - return in_size; -} -EXPORT_SYMBOL_GPL(tpm_write); - -ssize_t tpm_read(struct file *file, char __user *buf, - size_t size, loff_t *off) -{ - struct tpm_chip *chip = file->private_data; - int ret_size; -#ifdef CONFIG_XEN - int pos, pending = 0; -#endif - -#ifndef CONFIG_XEN - del_singleshot_timer_sync(&chip->user_read_timer); - flush_scheduled_work(); -#endif - ret_size = atomic_read(&chip->data_pending); -#ifndef CONFIG_XEN - atomic_set(&chip->data_pending, 0); -#endif - if (ret_size > 0) { /* relay data */ - if (size < ret_size) - ret_size = size; - -#ifdef CONFIG_XEN - pos = atomic_read(&chip->data_position); -#endif - down(&chip->buffer_mutex); -#ifndef CONFIG_XEN - if (copy_to_user(buf, chip->data_buffer, ret_size)) -#else - if (copy_to_user(buf, &chip->data_buffer[pos], ret_size)) { -#endif - ret_size = -EFAULT; -#ifdef CONFIG_XEN - } else { - pending = atomic_read(&chip->data_pending) - ret_size; - if ( pending ) { - atomic_set(&chip->data_pending, pending); - atomic_set(&chip->data_position, - pos+ret_size); - } - } -#endif - up(&chip->buffer_mutex); - } - -#ifdef CONFIG_XEN - if ( ret_size <= 0 || pending == 0 ) { - atomic_set(&chip->data_pending, 0); - del_singleshot_timer_sync(&chip->user_read_timer); - flush_scheduled_work(); - } -#endif - return ret_size; -} -EXPORT_SYMBOL_GPL(tpm_read); - -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(&chip->list); - - spin_unlock(&driver_lock); - - dev_set_drvdata(dev, NULL); - misc_deregister(&chip->vendor.miscdev); - kfree(chip->vendor.miscdev.name); - - sysfs_remove_group(&dev->kobj, chip->vendor.attr_group); - tpm_bios_log_teardown(chip->bios_dir); - - clear_bit(chip->dev_num, dev_mask); - - kfree(chip); - - put_device(dev); -} -EXPORT_SYMBOL_GPL(tpm_remove_hardware); - -static u8 savestate[] = { - 0, 193, /* TPM_TAG_RQU_COMMAND */ - 0, 0, 0, 10, /* blob length (in bytes) */ - 0, 0, 0, 152 /* TPM_ORD_SaveState */ -}; - -/* - * We are about to suspend. Save the TPM state - * so that it can be restored. - */ -int tpm_pm_suspend(struct device *dev, pm_message_t pm_state) -{ - struct tpm_chip *chip = dev_get_drvdata(dev); - if (chip == NULL) - return -ENODEV; - - tpm_transmit(chip, savestate, sizeof(savestate)); - return 0; -} -EXPORT_SYMBOL_GPL(tpm_pm_suspend); - -/* - * Resume from a power safe. The BIOS already restored - * the TPM state. - */ -int tpm_pm_resume(struct device *dev) -{ - struct tpm_chip *chip = dev_get_drvdata(dev); - - if (chip == NULL) - return -ENODEV; - - return 0; -} -EXPORT_SYMBOL_GPL(tpm_pm_resume); - -/* - * Called from tpm_.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_vendor_specific - *entry) -{ -#define DEVNAME_SIZE 7 - - char *devname; - struct tpm_chip *chip; - - /* Driver specific per-device data */ - chip = kzalloc(sizeof(*chip), GFP_KERNEL); - if (chip == NULL) - return NULL; - - init_MUTEX(&chip->buffer_mutex); - init_MUTEX(&chip->tpm_mutex); - INIT_LIST_HEAD(&chip->list); - - INIT_WORK(&chip->work, timeout_work, chip); - - init_timer(&chip->user_read_timer); - chip->user_read_timer.function = user_reader_timeout; - chip->user_read_timer.data = (unsigned long) chip; - - memcpy(&chip->vendor, entry, sizeof(struct tpm_vendor_specific)); - - 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"); - kfree(chip); - return NULL; - } else if (chip->dev_num == 0) - chip->vendor.miscdev.minor = TPM_MINOR; - else - chip->vendor.miscdev.minor = MISC_DYNAMIC_MINOR; - - set_bit(chip->dev_num, dev_mask); - - devname = kmalloc(DEVNAME_SIZE, GFP_KERNEL); - scnprintf(devname, DEVNAME_SIZE, "%s%d", "tpm", chip->dev_num); - chip->vendor.miscdev.name = devname; - - chip->vendor.miscdev.dev = dev; - chip->dev = get_device(dev); - - if (misc_register(&chip->vendor.miscdev)) { - dev_err(chip->dev, - "unable to misc_register %s, minor %d\n", - chip->vendor.miscdev.name, - chip->vendor.miscdev.minor); - put_device(dev); - clear_bit(chip->dev_num, dev_mask); - kfree(chip); - kfree(devname); - return NULL; - } - - spin_lock(&driver_lock); - - dev_set_drvdata(dev, chip); - - list_add(&chip->list, &tpm_chip_list); - - spin_unlock(&driver_lock); - - sysfs_create_group(&dev->kobj, chip->vendor.attr_group); - - chip->bios_dir = tpm_bios_log_setup(devname); - - return chip; -} -EXPORT_SYMBOL_GPL(tpm_register_hardware); - -MODULE_AUTHOR("Leendert van Doorn (leendert@xxxxxxxxxxxxxx)"); -MODULE_DESCRIPTION("TPM Driver"); -MODULE_VERSION("2.0"); -MODULE_LICENSE("GPL");