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[PATCH] tpm: msecs_to_jiffies cleanups 

The timeout and duration values used in the tpm driver are not exposed to
userspace.  This patch converts the storage units to jiffies with
msecs_to_jiffies.  They were always being used in jiffies so this
simplifies things removing the need for calculation all over the place.
The change necessitated a type change in the tpm_chip struct to hold
jiffies.

Signed-off-by: Kylie Hall <kjhall@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Kylene Jo Hall 2006-04-22 02:38:19 -07:00 committed by Linus Torvalds
parent 27084efee0
commit 36b20020e5
3 changed files with 32 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/char/tpm/tpm.c
View File

@ -354,7 +354,7 @@ unsigned long tpm_calc_ordinal_duration(struct tpm_chip *chip,
TPM_PROTECTED_ORDINAL_MASK];
if (duration_idx != TPM_UNDEFINED)
duration = chip->vendor.duration[duration_idx] * HZ / 1000;
duration = chip->vendor.duration[duration_idx];
if (duration <= 0)
return 2 * 60 * HZ;
else
@ -524,19 +524,19 @@ void tpm_get_timeouts(struct tpm_chip *chip)
timeout =
be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX)));
if (timeout)
chip->vendor.timeout_a = 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 = 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 = 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 = timeout;
chip->vendor.timeout_d = msecs_to_jiffies(timeout);
duration:
memcpy(data, tpm_cap, sizeof(tpm_cap));
@ -553,11 +553,17 @@ duration:
return;
chip->vendor.duration[TPM_SHORT] =
be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_1_IDX)));
msecs_to_jiffies(be32_to_cpu
(*((__be32 *) (data +
TPM_GET_CAP_RET_UINT32_1_IDX))));
chip->vendor.duration[TPM_MEDIUM] =
be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_2_IDX)));
msecs_to_jiffies(be32_to_cpu
(*((__be32 *) (data +
TPM_GET_CAP_RET_UINT32_2_IDX))));
chip->vendor.duration[TPM_LONG] =
be32_to_cpu(*((__be32 *) (data + TPM_GET_CAP_RET_UINT32_3_IDX)));
msecs_to_jiffies(be32_to_cpu
(*((__be32 *) (data +
TPM_GET_CAP_RET_UINT32_3_IDX))));
}
EXPORT_SYMBOL_GPL(tpm_get_timeouts);

4
drivers/char/tpm/tpm.h
View File

@ -77,8 +77,8 @@ struct tpm_vendor_specific {
struct attribute_group *attr_group;
struct list_head list;
int locality;
u32 timeout_a, timeout_b, timeout_c, timeout_d;
u32 duration[3];
unsigned long timeout_a, timeout_b, timeout_c, timeout_d; /* jiffies */
unsigned long duration[3]; /* jiffies */
wait_queue_head_t read_queue;
wait_queue_head_t int_queue;

32
drivers/char/tpm/tpm_tis.c
View File

@ -51,6 +51,11 @@ enum tis_int_flags {
TPM_INTF_DATA_AVAIL_INT = 0x001,
};
enum tis_defaults {
TIS_SHORT_TIMEOUT = 750, /* ms */
TIS_LONG_TIMEOUT = 2000, /* 2 sec */
};
#define TPM_ACCESS(l) (0x0000 | ((l) << 12))
#define TPM_INT_ENABLE(l) (0x0008 | ((l) << 12))
#define TPM_INT_VECTOR(l) (0x000C | ((l) << 12))
@ -96,19 +101,16 @@ static int request_locality(struct tpm_chip *chip, int l)
chip->vendor.iobase + TPM_ACCESS(l));
if (chip->vendor.irq) {
rc = wait_event_interruptible_timeout(chip->vendor.
int_queue,
rc = wait_event_interruptible_timeout(chip->vendor.int_queue,
(check_locality
(chip, l) >= 0),
msecs_to_jiffies
(chip->vendor.
timeout_a));
chip->vendor.timeout_a);
if (rc > 0)
return l;
} else {
/* wait for burstcount */
stop = jiffies + (HZ * chip->vendor.timeout_a / 1000);
stop = jiffies + chip->vendor.timeout_a;
do {
if (check_locality(chip, l) >= 0)
return l;
@ -139,7 +141,7 @@ static int get_burstcount(struct tpm_chip *chip)
/* wait for burstcount */
/* which timeout value, spec has 2 answers (c & d) */
stop = jiffies + (HZ * chip->vendor.timeout_d / 1000);
stop = jiffies + chip->vendor.timeout_d;
do {
burstcnt = ioread8(chip->vendor.iobase +
TPM_STS(chip->vendor.locality) + 1);
@ -153,7 +155,7 @@ static int get_burstcount(struct tpm_chip *chip)
return -EBUSY;
}
static int wait_for_stat(struct tpm_chip *chip, u8 mask, u32 timeout,
static int wait_for_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
wait_queue_head_t *queue)
{
unsigned long stop;
@ -169,13 +171,11 @@ static int wait_for_stat(struct tpm_chip *chip, u8 mask, u32 timeout,
rc = wait_event_interruptible_timeout(*queue,
((tpm_tis_status
(chip) & mask) ==
mask),
msecs_to_jiffies
(timeout));
mask), timeout);
if (rc > 0)
return 0;
} else {
stop = jiffies + (HZ * timeout / 1000);
stop = jiffies + timeout;
do {
msleep(TPM_TIMEOUT);
status = tpm_tis_status(chip);
@ -453,10 +453,10 @@ static int __devinit tpm_tis_pnp_init(struct pnp_dev
}
/* Default timeouts */
chip->vendor.timeout_a = 750; /* ms */
chip->vendor.timeout_b = 2000; /* 2 sec */
chip->vendor.timeout_c = 750; /* ms */
chip->vendor.timeout_d = 750; /* ms */
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);
dev_info(&pnp_dev->dev,
"1.2 TPM (device-id 0x%X, rev-id %d)\n",