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s390/ap: Add functiton facility information as AP device attribute.

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Add the function facility information as new ap_device and sysfs
attribute. Also make the number of requests in device
queue and in device driver queue accessible in sysfs.

Reviewed-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>
Signed-off-by: Holger Dengler <hd@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Holger Dengler
2012-08-28 16:43:48 +02:00
committed by Martin Schwidefsky
parent 7501455051
commit b26bd9413c
3 changed files with 52 additions and 22 deletions
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60
drivers/s390/crypto/ap_bus.c
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@@ -324,25 +324,6 @@ static int ap_query_functions(ap_qid_t qid, unsigned int *functions)
#endif
}
/**
* ap_4096_commands_availablen(): Check for availability of 4096 bit RSA
* support.
* @qid: The AP queue number
*
* Returns 1 if 4096 bit RSA keys are support fo the AP, returns 0 if not.
*/
int ap_4096_commands_available(ap_qid_t qid)
{
unsigned int functions;
if (ap_query_functions(qid, &functions))
return 0;
return ap_test_bit(&functions, 1) &&
ap_test_bit(&functions, 2);
}
EXPORT_SYMBOL(ap_4096_commands_available);
/**
* ap_queue_enable_interruption(): Enable interruption on an AP.
* @qid: The AP queue number
@@ -690,6 +671,34 @@ static ssize_t ap_request_count_show(struct device *dev,
static DEVICE_ATTR(request_count, 0444, ap_request_count_show, NULL);
static ssize_t ap_requestq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_device *ap_dev = to_ap_dev(dev);
int rc;
spin_lock_bh(&ap_dev->lock);
rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->requestq_count);
spin_unlock_bh(&ap_dev->lock);
return rc;
}
static DEVICE_ATTR(requestq_count, 0444, ap_requestq_count_show, NULL);
static ssize_t ap_pendingq_count_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_device *ap_dev = to_ap_dev(dev);
int rc;
spin_lock_bh(&ap_dev->lock);
rc = snprintf(buf, PAGE_SIZE, "%d\n", ap_dev->pendingq_count);
spin_unlock_bh(&ap_dev->lock);
return rc;
}
static DEVICE_ATTR(pendingq_count, 0444, ap_pendingq_count_show, NULL);
static ssize_t ap_modalias_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -698,11 +707,23 @@ static ssize_t ap_modalias_show(struct device *dev,
static DEVICE_ATTR(modalias, 0444, ap_modalias_show, NULL);
static ssize_t ap_functions_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct ap_device *ap_dev = to_ap_dev(dev);
return snprintf(buf, PAGE_SIZE, "0x%08X\n", ap_dev->functions);
}
static DEVICE_ATTR(ap_functions, 0444, ap_functions_show, NULL);
static struct attribute *ap_dev_attrs[] = {
&dev_attr_hwtype.attr,
&dev_attr_depth.attr,
&dev_attr_request_count.attr,
&dev_attr_requestq_count.attr,
&dev_attr_pendingq_count.attr,
&dev_attr_modalias.attr,
&dev_attr_ap_functions.attr,
NULL
};
static struct attribute_group ap_dev_attr_group = {
@@ -1329,6 +1350,7 @@ static void ap_scan_bus(struct work_struct *unused)
kfree(ap_dev);
continue;
}
ap_dev->functions = device_functions;
if (ap_test_bit(&device_functions, 3))
ap_dev->device_type = AP_DEVICE_TYPE_CEX3C;
else if (ap_test_bit(&device_functions, 4))