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e587137240
This reverts commit 9b29050f8f.
It has caused hibernate regressions, for example Juri Sladby's report:
"I'm unable to hibernate 2.6.37.1 unless I rmmod tpm_tis:
[10974.074587] Suspending console(s) (use no_console_suspend to debug)
[10974.103073] tpm_tis 00:0c: Operation Timed out
[10974.103089] legacy_suspend(): pnp_bus_suspend+0x0/0xa0 returns -62
[10974.103095] PM: Device 00:0c failed to freeze: error -62"
and Rafael points out that some of the new conditionals in that commit
seem to make no sense. This commit needs more work and testing, let's
revert it for now.
Reported-by: Norbert Preining <preining@logic.at>
Reported-and-requested-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Stefan Berger <stefanb@linux.vnet.ibm.com>
Cc: Guillaume Chazarain <guichaz@gmail.com>
Cc: Rajiv Andrade <srajiv@linux.vnet.ibm.com>
Acked-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
303 lines
7.3 KiB
C
303 lines
7.3 KiB
C
/*
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* Copyright (C) 2004 IBM Corporation
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*
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* Authors:
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* Leendert van Doorn <leendert@watson.ibm.com>
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* Dave Safford <safford@watson.ibm.com>
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* Reiner Sailer <sailer@watson.ibm.com>
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* Kylene Hall <kjhall@us.ibm.com>
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*
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* Maintained by: <tpmdd-devel@lists.sourceforge.net>
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*
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* Device driver for TCG/TCPA TPM (trusted platform module).
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* Specifications at www.trustedcomputinggroup.org
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*
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*/
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/fs.h>
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#include <linux/mutex.h>
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#include <linux/sched.h>
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#include <linux/miscdevice.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <linux/tpm.h>
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enum tpm_timeout {
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TPM_TIMEOUT = 5, /* msecs */
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};
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/* TPM addresses */
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enum tpm_addr {
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TPM_SUPERIO_ADDR = 0x2E,
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TPM_ADDR = 0x4E,
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};
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extern ssize_t tpm_show_pubek(struct device *, struct device_attribute *attr,
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char *);
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extern ssize_t tpm_show_pcrs(struct device *, struct device_attribute *attr,
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char *);
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extern ssize_t tpm_show_caps(struct device *, struct device_attribute *attr,
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char *);
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extern ssize_t tpm_show_caps_1_2(struct device *, struct device_attribute *attr,
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char *);
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extern ssize_t tpm_store_cancel(struct device *, struct device_attribute *attr,
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const char *, size_t);
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extern ssize_t tpm_show_enabled(struct device *, struct device_attribute *attr,
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char *);
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extern ssize_t tpm_show_active(struct device *, struct device_attribute *attr,
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char *);
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extern ssize_t tpm_show_owned(struct device *, struct device_attribute *attr,
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char *);
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extern ssize_t tpm_show_temp_deactivated(struct device *,
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struct device_attribute *attr, char *);
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struct tpm_chip;
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struct tpm_vendor_specific {
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const u8 req_complete_mask;
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const u8 req_complete_val;
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const u8 req_canceled;
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void __iomem *iobase; /* ioremapped address */
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unsigned long base; /* TPM base address */
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int irq;
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int region_size;
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int have_region;
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int (*recv) (struct tpm_chip *, u8 *, size_t);
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int (*send) (struct tpm_chip *, u8 *, size_t);
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void (*cancel) (struct tpm_chip *);
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u8 (*status) (struct tpm_chip *);
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void (*release) (struct device *);
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struct miscdevice miscdev;
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struct attribute_group *attr_group;
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struct list_head list;
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int locality;
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unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
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unsigned long duration[3]; /* jiffies */
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wait_queue_head_t read_queue;
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wait_queue_head_t int_queue;
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};
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struct tpm_chip {
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struct device *dev; /* Device stuff */
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int dev_num; /* /dev/tpm# */
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unsigned long is_open; /* only one allowed */
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int time_expired;
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/* Data passed to and from the tpm via the read/write calls */
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u8 *data_buffer;
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atomic_t data_pending;
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struct mutex buffer_mutex;
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struct timer_list user_read_timer; /* user needs to claim result */
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struct work_struct work;
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struct mutex tpm_mutex; /* tpm is processing */
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struct tpm_vendor_specific vendor;
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struct dentry **bios_dir;
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struct list_head list;
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void (*release) (struct device *);
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};
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#define to_tpm_chip(n) container_of(n, struct tpm_chip, vendor)
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static inline void tpm_chip_put(struct tpm_chip *chip)
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{
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module_put(chip->dev->driver->owner);
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}
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static inline int tpm_read_index(int base, int index)
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{
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outb(index, base);
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return inb(base+1) & 0xFF;
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}
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static inline void tpm_write_index(int base, int index, int value)
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{
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outb(index, base);
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outb(value & 0xFF, base+1);
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}
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struct tpm_input_header {
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__be16 tag;
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__be32 length;
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__be32 ordinal;
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}__attribute__((packed));
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struct tpm_output_header {
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__be16 tag;
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__be32 length;
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__be32 return_code;
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}__attribute__((packed));
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struct stclear_flags_t {
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__be16 tag;
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u8 deactivated;
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u8 disableForceClear;
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u8 physicalPresence;
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u8 physicalPresenceLock;
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u8 bGlobalLock;
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}__attribute__((packed));
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struct tpm_version_t {
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u8 Major;
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u8 Minor;
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u8 revMajor;
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u8 revMinor;
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}__attribute__((packed));
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struct tpm_version_1_2_t {
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__be16 tag;
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u8 Major;
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u8 Minor;
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u8 revMajor;
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u8 revMinor;
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}__attribute__((packed));
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struct timeout_t {
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__be32 a;
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__be32 b;
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__be32 c;
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__be32 d;
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}__attribute__((packed));
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struct duration_t {
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__be32 tpm_short;
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__be32 tpm_medium;
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__be32 tpm_long;
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}__attribute__((packed));
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struct permanent_flags_t {
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__be16 tag;
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u8 disable;
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u8 ownership;
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u8 deactivated;
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u8 readPubek;
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u8 disableOwnerClear;
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u8 allowMaintenance;
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u8 physicalPresenceLifetimeLock;
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u8 physicalPresenceHWEnable;
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u8 physicalPresenceCMDEnable;
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u8 CEKPUsed;
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u8 TPMpost;
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u8 TPMpostLock;
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u8 FIPS;
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u8 operator;
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u8 enableRevokeEK;
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u8 nvLocked;
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u8 readSRKPub;
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u8 tpmEstablished;
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u8 maintenanceDone;
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u8 disableFullDALogicInfo;
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}__attribute__((packed));
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typedef union {
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struct permanent_flags_t perm_flags;
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struct stclear_flags_t stclear_flags;
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bool owned;
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__be32 num_pcrs;
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struct tpm_version_t tpm_version;
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struct tpm_version_1_2_t tpm_version_1_2;
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__be32 manufacturer_id;
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struct timeout_t timeout;
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struct duration_t duration;
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} cap_t;
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struct tpm_getcap_params_in {
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__be32 cap;
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__be32 subcap_size;
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__be32 subcap;
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}__attribute__((packed));
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struct tpm_getcap_params_out {
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__be32 cap_size;
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cap_t cap;
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}__attribute__((packed));
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struct tpm_readpubek_params_out {
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u8 algorithm[4];
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u8 encscheme[2];
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u8 sigscheme[2];
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__be32 paramsize;
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u8 parameters[12]; /*assuming RSA*/
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__be32 keysize;
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u8 modulus[256];
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u8 checksum[20];
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}__attribute__((packed));
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typedef union {
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struct tpm_input_header in;
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struct tpm_output_header out;
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} tpm_cmd_header;
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#define TPM_DIGEST_SIZE 20
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struct tpm_pcrread_out {
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u8 pcr_result[TPM_DIGEST_SIZE];
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}__attribute__((packed));
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struct tpm_pcrread_in {
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__be32 pcr_idx;
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}__attribute__((packed));
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struct tpm_pcrextend_in {
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__be32 pcr_idx;
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u8 hash[TPM_DIGEST_SIZE];
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}__attribute__((packed));
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typedef union {
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struct tpm_getcap_params_out getcap_out;
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struct tpm_readpubek_params_out readpubek_out;
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u8 readpubek_out_buffer[sizeof(struct tpm_readpubek_params_out)];
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struct tpm_getcap_params_in getcap_in;
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struct tpm_pcrread_in pcrread_in;
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struct tpm_pcrread_out pcrread_out;
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struct tpm_pcrextend_in pcrextend_in;
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} tpm_cmd_params;
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struct tpm_cmd_t {
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tpm_cmd_header header;
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tpm_cmd_params params;
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}__attribute__((packed));
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ssize_t tpm_getcap(struct device *, __be32, cap_t *, const char *);
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extern void tpm_get_timeouts(struct tpm_chip *);
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extern void tpm_gen_interrupt(struct tpm_chip *);
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extern void tpm_continue_selftest(struct tpm_chip *);
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extern unsigned long tpm_calc_ordinal_duration(struct tpm_chip *, u32);
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extern struct tpm_chip* tpm_register_hardware(struct device *,
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const struct tpm_vendor_specific *);
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extern int tpm_open(struct inode *, struct file *);
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extern int tpm_release(struct inode *, struct file *);
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extern void tpm_dev_vendor_release(struct tpm_chip *);
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extern ssize_t tpm_write(struct file *, const char __user *, size_t,
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loff_t *);
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extern ssize_t tpm_read(struct file *, char __user *, size_t, loff_t *);
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extern void tpm_remove_hardware(struct device *);
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extern int tpm_pm_suspend(struct device *, pm_message_t);
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extern int tpm_pm_resume(struct device *);
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#ifdef CONFIG_ACPI
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extern struct dentry ** tpm_bios_log_setup(char *);
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extern void tpm_bios_log_teardown(struct dentry **);
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#else
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static inline struct dentry ** tpm_bios_log_setup(char *name)
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{
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return NULL;
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}
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static inline void tpm_bios_log_teardown(struct dentry **dir)
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{
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}
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#endif
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