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| author |   Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com> | 2016-08-25 11:19:58 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-12-14 16:33:38 +0100 |
| commit | b886a9d1560d6c7d5d58344b16f53ab2cba5b666 (patch) | |
| tree | 49612dac289350bbdb0e4e2e9253ec15d413ae65 /drivers/s390/crypto | |
| parent | s390/zcrypt: add multi domain support (diff) | |
| download | linux-dev-b886a9d1560d6c7d5d58344b16f53ab2cba5b666.tar.xz linux-dev-b886a9d1560d6c7d5d58344b16f53ab2cba5b666.zip | |
s390/zcrypt: Introduce new zcrypt device status API
Introduce new ioctl (ZDEVICESTATUS) to provide detailed
information, like hardware type, domains, status and functionality
of available crypto devices.
Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/crypto')
| -rw-r--r-- | drivers/s390/crypto/zcrypt_api.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/s390/crypto/zcrypt_api.c b/drivers/s390/crypto/zcrypt_api.c index fd0ae8cd2bee..403af9d1ebde 100644 --- a/drivers/s390/crypto/zcrypt_api.c +++ b/drivers/s390/crypto/zcrypt_api.c @@ -539,6 +539,29 @@ static long zcrypt_rng(char *buffer) return rc; } +static void zcrypt_device_status_mask(struct zcrypt_device_matrix *matrix) +{ + struct zcrypt_card *zc; + struct zcrypt_queue *zq; + struct zcrypt_device_status *stat; + + memset(matrix, 0, sizeof(*matrix)); + spin_lock(&zcrypt_list_lock); + for_each_zcrypt_card(zc) { + for_each_zcrypt_queue(zq, zc) { + stat = matrix->device; + stat += AP_QID_CARD(zq->queue->qid) * MAX_ZDEV_DOMAINS; + stat += AP_QID_QUEUE(zq->queue->qid); + stat->hwtype = zc->card->ap_dev.device_type; + stat->functions = zc->card->functions >> 26; + stat->qid = zq->queue->qid; + stat->online = zq->online ? 0x01 : 0x00; + } + } + spin_unlock(&zcrypt_list_lock); +} +EXPORT_SYMBOL(zcrypt_device_status_mask); + static void zcrypt_status_mask(char status[AP_DEVICES]) { struct zcrypt_card *zc; @@ -764,6 +787,25 @@ static long zcrypt_unlocked_ioctl(struct file *filp, unsigned int cmd, return -EFAULT; return rc; } + case ZDEVICESTATUS: { + struct zcrypt_device_matrix *device_status; + + device_status = kzalloc(sizeof(struct zcrypt_device_matrix), + GFP_KERNEL); + if (!device_status) + return -ENOMEM; + + zcrypt_device_status_mask(device_status); + + if (copy_to_user((char __user *) arg, device_status, + sizeof(struct zcrypt_device_matrix))) { + kfree(device_status); + return -EFAULT; + } + + kfree(device_status); + return 0; + } case Z90STAT_STATUS_MASK: { char status[AP_DEVICES]; zcrypt_status_mask(status); |