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Subject[PATCH 4/5 v2] tpm: Use the ops structure instead of a copy in tpm_vendor_specific
Date
This builds on the last commit to use the ops structure in the core
and reduce the size of tpm_vendor_specific.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com>
---
drivers/char/tpm/tpm-interface.c | 34 ++++++++++++----------------------
drivers/char/tpm/tpm-sysfs.c | 2 +-
drivers/char/tpm/tpm.h | 9 +--------
drivers/char/tpm/tpm_i2c_stm_st33.c | 4 ++--
4 files changed, 16 insertions(+), 33 deletions(-)

diff --git a/drivers/char/tpm/tpm-interface.c b/drivers/char/tpm/tpm-interface.c
index 0662b70..5a2807c 100644
--- a/drivers/char/tpm/tpm-interface.c
+++ b/drivers/char/tpm/tpm-interface.c
@@ -353,7 +353,7 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,

mutex_lock(&chip->tpm_mutex);

- rc = chip->vendor.send(chip, (u8 *) buf, count);
+ rc = chip->ops->send(chip, (u8 *) buf, count);
if (rc < 0) {
dev_err(chip->dev,
"tpm_transmit: tpm_send: error %zd\n", rc);
@@ -365,12 +365,12 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,

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)
+ u8 status = chip->ops->status(chip);
+ if ((status & chip->ops->req_complete_mask) ==
+ chip->ops->req_complete_val)
goto out_recv;

- if (chip->vendor.req_canceled(chip, status)) {
+ if (chip->ops->req_canceled(chip, status)) {
dev_err(chip->dev, "Operation Canceled\n");
rc = -ECANCELED;
goto out;
@@ -380,13 +380,13 @@ ssize_t tpm_transmit(struct tpm_chip *chip, const char *buf,
rmb();
} while (time_before(jiffies, stop));

- chip->vendor.cancel(chip);
+ chip->ops->cancel(chip);
dev_err(chip->dev, "Operation Timed out\n");
rc = -ETIME;
goto out;

out_recv:
- rc = chip->vendor.recv(chip, (u8 *) buf, bufsiz);
+ rc = chip->ops->recv(chip, (u8 *) buf, bufsiz);
if (rc < 0)
dev_err(chip->dev,
"tpm_transmit: tpm_recv: error %zd\n", rc);
@@ -807,12 +807,12 @@ EXPORT_SYMBOL_GPL(tpm_send);
static bool wait_for_tpm_stat_cond(struct tpm_chip *chip, u8 mask,
bool check_cancel, bool *canceled)
{
- u8 status = chip->vendor.status(chip);
+ u8 status = chip->ops->status(chip);

*canceled = false;
if ((status & mask) == mask)
return true;
- if (check_cancel && chip->vendor.req_canceled(chip, status)) {
+ if (check_cancel && chip->ops->req_canceled(chip, status)) {
*canceled = true;
return true;
}
@@ -828,7 +828,7 @@ int wait_for_tpm_stat(struct tpm_chip *chip, u8 mask, unsigned long timeout,
bool canceled = false;

/* check current status */
- status = chip->vendor.status(chip);
+ status = chip->ops->status(chip);
if ((status & mask) == mask)
return 0;

@@ -855,7 +855,7 @@ again:
} else {
do {
msleep(TPM_TIMEOUT);
- status = chip->vendor.status(chip);
+ status = chip->ops->status(chip);
if ((status & mask) == mask)
return 0;
} while (time_before(jiffies, stop));
@@ -1027,9 +1027,6 @@ void tpm_dev_vendor_release(struct tpm_chip *chip)
if (!chip)
return;

- if (chip->vendor.release)
- chip->vendor.release(chip->dev);
-
clear_bit(chip->dev_num, dev_mask);
}
EXPORT_SYMBOL_GPL(tpm_dev_vendor_release);
@@ -1074,14 +1071,7 @@ struct tpm_chip *tpm_register_hardware(struct device *dev,
mutex_init(&chip->tpm_mutex);
INIT_LIST_HEAD(&chip->list);

- chip->vendor.req_complete_mask = ops->req_complete_mask;
- chip->vendor.req_complete_val = ops->req_complete_val;
- chip->vendor.req_canceled = ops->req_canceled;
- chip->vendor.recv = ops->recv;
- chip->vendor.send = ops->send;
- chip->vendor.cancel = ops->cancel;
- chip->vendor.status = ops->status;
-
+ chip->ops = ops;
chip->dev_num = find_first_zero_bit(dev_mask, TPM_NUM_DEVICES);

if (chip->dev_num >= TPM_NUM_DEVICES) {
diff --git a/drivers/char/tpm/tpm-sysfs.c b/drivers/char/tpm/tpm-sysfs.c
index 3bcfed0..d2a8bca 100644
--- a/drivers/char/tpm/tpm-sysfs.c
+++ b/drivers/char/tpm/tpm-sysfs.c
@@ -245,7 +245,7 @@ static ssize_t cancel_store(struct device *dev, struct device_attribute *attr,
if (chip == NULL)
return 0;

- chip->vendor.cancel(chip);
+ chip->ops->cancel(chip);
return count;
}
static DEVICE_ATTR_WO(cancel);
diff --git a/drivers/char/tpm/tpm.h b/drivers/char/tpm/tpm.h
index a56af2c..7b0a46e 100644
--- a/drivers/char/tpm/tpm.h
+++ b/drivers/char/tpm/tpm.h
@@ -64,9 +64,6 @@ enum tpm_duration {
struct tpm_chip;

struct tpm_vendor_specific {
- u8 req_complete_mask;
- u8 req_complete_val;
- bool (*req_canceled)(struct tpm_chip *chip, u8 status);
void __iomem *iobase; /* ioremapped address */
unsigned long base; /* TPM base address */

@@ -76,11 +73,6 @@ struct tpm_vendor_specific {
int region_size;
int have_region;

- int (*recv) (struct tpm_chip *, u8 *, size_t);
- int (*send) (struct tpm_chip *, u8 *, size_t);
- void (*cancel) (struct tpm_chip *);
- u8 (*status) (struct tpm_chip *);
- void (*release) (struct device *);
struct miscdevice miscdev;
struct list_head list;
int locality;
@@ -104,6 +96,7 @@ struct tpm_vendor_specific {

struct tpm_chip {
struct device *dev; /* Device stuff */
+ const struct tpm_class_ops *ops;

int dev_num; /* /dev/tpm# */
char devname[7];
diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c
index 874b3be..5b0dd8e 100644
--- a/drivers/char/tpm/tpm_i2c_stm_st33.c
+++ b/drivers/char/tpm/tpm_i2c_stm_st33.c
@@ -564,7 +564,7 @@ static int tpm_stm_i2c_recv(struct tpm_chip *chip, unsigned char *buf,
}

out:
- chip->vendor.cancel(chip);
+ chip->ops->cancel(chip);
release_locality(chip);
return size;
}
@@ -807,7 +807,7 @@ static int tpm_st33_i2c_pm_resume(struct device *dev)
if (power_mgt) {
gpio_set_value(pin_infos->io_lpcpd, 1);
ret = wait_for_serirq_timeout(chip,
- (chip->vendor.status(chip) &
+ (chip->ops->status(chip) &
TPM_STS_VALID) == TPM_STS_VALID,
chip->vendor.timeout_b);
} else {
--
1.8.1.2


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