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Commit c531c9ec authored by Samuel Ortiz's avatar Samuel Ortiz
Browse files

NFC: Add secure element enablement internal API 



Called via netlink, this API will enable or disable a specific secure
element. When a secure element is enabled, it will handle card emulation
and more generically ISO-DEP target mode, i.e. all target mode cases
except for p2p target mode.

Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent ee656e9d

net/nfc/core.c

+106 −4
Original line number Diff line number Diff line
@@ -528,6 +528,108 @@ int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb, 
	return rc;

}



static struct nfc_se *find_se(struct nfc_dev *dev, u32 se_idx)

{

	struct nfc_se *se, *n;



	list_for_each_entry_safe(se, n, &dev->secure_elements, list)

		if (se->idx == se_idx)

			return se;



	return NULL;

}



int nfc_enable_se(struct nfc_dev *dev, u32 se_idx)

{



	struct nfc_se *se;

	int rc;



	pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);



	device_lock(&dev->dev);



	if (!device_is_registered(&dev->dev)) {

		rc = -ENODEV;

		goto error;

	}



	if (!dev->dev_up) {

		rc = -ENODEV;

		goto error;

	}



	if (dev->polling) {

		rc = -EBUSY;

		goto error;

	}



	if (!dev->ops->enable_se || !dev->ops->disable_se) {

		rc = -EOPNOTSUPP;

		goto error;

	}



	se = find_se(dev, se_idx);

	if (!se) {

		rc = -EINVAL;

		goto error;

	}



	if (se->type == NFC_SE_ENABLED) {

		rc = -EALREADY;

		goto error;

	}



	rc = dev->ops->enable_se(dev, se_idx);



error:

	device_unlock(&dev->dev);

	return rc;

}



int nfc_disable_se(struct nfc_dev *dev, u32 se_idx)

{



	struct nfc_se *se;

	int rc;



	pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);



	device_lock(&dev->dev);



	if (!device_is_registered(&dev->dev)) {

		rc = -ENODEV;

		goto error;

	}



	if (!dev->dev_up) {

		rc = -ENODEV;

		goto error;

	}



	if (!dev->ops->enable_se || !dev->ops->disable_se) {

		rc = -EOPNOTSUPP;

		goto error;

	}



	se = find_se(dev, se_idx);

	if (!se) {

		rc = -EINVAL;

		goto error;

	}



	if (se->type == NFC_SE_DISABLED) {

		rc = -EALREADY;

		goto error;

	}



	rc = dev->ops->disable_se(dev, se_idx);



error:

	device_unlock(&dev->dev);

	return rc;

}



int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len)

{

	pr_debug("dev_name=%s gb_len=%d\n", dev_name(&dev->dev), gb_len);
@@ -762,13 +864,13 @@ EXPORT_SYMBOL(nfc_driver_failure); 


int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type)

{

	struct nfc_se *se, *n;

	struct nfc_se *se;

	int rc;



	pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);



	list_for_each_entry_safe(se, n, &dev->secure_elements, list)

		if (se->idx == se_idx)

	se = find_se(dev, se_idx);

	if (se)

		return -EALREADY;



	se = kzalloc(sizeof(struct nfc_se), GFP_KERNEL);

net/nfc/nfc.h

+3 −0
Original line number Diff line number Diff line
@@ -147,4 +147,7 @@ int nfc_deactivate_target(struct nfc_dev *dev, u32 target_idx); 
int nfc_data_exchange(struct nfc_dev *dev, u32 target_idx, struct sk_buff *skb,

		      data_exchange_cb_t cb, void *cb_context);



int nfc_enable_se(struct nfc_dev *dev, u32 se_idx);

int nfc_disable_se(struct nfc_dev *dev, u32 se_idx);



#endif /* __LOCAL_NFC_H */