NFC: Add secure element enablement netlink API

Enabling or disabling an NFC accessible secure element through netlink
requires giving both an NFC controller and a secure element indexes.
Once enabled the secure element will handle card emulation once polling
starts.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 56 insertions, 0 deletions

diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 8a11a3a27e69..b05ad909778f 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1145,6 +1145,52 @@ free_msg:
         return -EMSGSIZE;
 }
 
+static int nfc_genl_enable_se(struct sk_buff *skb, struct genl_info *info)
+{
+        struct nfc_dev *dev;
+        int rc;
+        u32 idx, se_idx;
+
+        if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+            !info->attrs[NFC_ATTR_SE_INDEX])
+                return -EINVAL;
+
+        idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+        se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
+
+        dev = nfc_get_device(idx);
+        if (!dev)
+                return -ENODEV;
+
+        rc = nfc_enable_se(dev, se_idx);
+
+        nfc_put_device(dev);
+        return rc;
+}
+
+static int nfc_genl_disable_se(struct sk_buff *skb, struct genl_info *info)
+{
+        struct nfc_dev *dev;
+        int rc;
+        u32 idx, se_idx;
+
+        if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+            !info->attrs[NFC_ATTR_SE_INDEX])
+                return -EINVAL;
+
+        idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+        se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
+
+        dev = nfc_get_device(idx);
+        if (!dev)
+                return -ENODEV;
+
+        rc = nfc_disable_se(dev, se_idx);
+
+        nfc_put_device(dev);
+        return rc;
+}
+
 static struct genl_ops nfc_genl_ops[] = {
         {
                 .cmd = NFC_CMD_GET_DEVICE,
@@ -1209,6 +1255,16 @@ static struct genl_ops nfc_genl_ops[] = {
                 .doit = nfc_genl_fw_upload,
                 .policy = nfc_genl_policy,
         },
+        {
+                .cmd = NFC_CMD_ENABLE_SE,
+                .doit = nfc_genl_enable_se,
+                .policy = nfc_genl_policy,
+        },
+        {
+                .cmd = NFC_CMD_DISABLE_SE,
+                .doit = nfc_genl_disable_se,
+                .policy = nfc_genl_policy,
+        },
 };