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nfc: nci: Add nci_nfcc_loopback to the nci core 

For test purpose, provide the generic nci loopback function.

Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Christophe Ricard 2016-04-30 09:12:52 +02:00 committed by Samuel Ortiz
parent 9b8d1a4cf2
commit 1c53855f6b
2 changed files with 79 additions and 0 deletions
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2
include/net/nfc/nci_core.h
View File

@ -306,6 +306,8 @@ int nci_core_conn_create(struct nci_dev *ndev, u8 destination_type,
size_t params_len,
struct core_conn_create_dest_spec_params *params);
int nci_core_conn_close(struct nci_dev *ndev, u8 conn_id);
int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len,
struct sk_buff **resp);
struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev);
int nci_hci_send_event(struct nci_dev *ndev, u8 gate, u8 event,

77
net/nfc/nci/core.c
View File

@ -400,6 +400,83 @@ int nci_core_init(struct nci_dev *ndev)
}
EXPORT_SYMBOL(nci_core_init);
struct nci_loopback_data {
u8 conn_id;
struct sk_buff *data;
};
static void nci_send_data_req(struct nci_dev *ndev, unsigned long opt)
{
struct nci_loopback_data *data = (struct nci_loopback_data *)opt;
nci_send_data(ndev, data->conn_id, data->data);
}
static void nci_nfcc_loopback_cb(void *context, struct sk_buff *skb, int err)
{
struct nci_dev *ndev = (struct nci_dev *)context;
struct nci_conn_info *conn_info;
conn_info = nci_get_conn_info_by_conn_id(ndev, ndev->cur_conn_id);
if (!conn_info) {
nci_req_complete(ndev, NCI_STATUS_REJECTED);
return;
}
conn_info->rx_skb = skb;
nci_req_complete(ndev, NCI_STATUS_OK);
}
int nci_nfcc_loopback(struct nci_dev *ndev, void *data, size_t data_len,
struct sk_buff **resp)
{
int r;
struct nci_loopback_data loopback_data;
struct nci_conn_info *conn_info;
struct sk_buff *skb;
int conn_id = nci_get_conn_info_by_dest_type_params(ndev,
NCI_DESTINATION_NFCC_LOOPBACK, NULL);
if (conn_id < 0) {
r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCC_LOOPBACK,
0, 0, NULL);
if (r != NCI_STATUS_OK)
return r;
conn_id = nci_get_conn_info_by_dest_type_params(ndev,
NCI_DESTINATION_NFCC_LOOPBACK,
NULL);
}
conn_info = nci_get_conn_info_by_conn_id(ndev, conn_id);
if (!conn_info)
return -EPROTO;
/* store cb and context to be used on receiving data */
conn_info->data_exchange_cb = nci_nfcc_loopback_cb;
conn_info->data_exchange_cb_context = ndev;
skb = nci_skb_alloc(ndev, NCI_DATA_HDR_SIZE + data_len, GFP_KERNEL);
if (!skb)
return -ENOMEM;
skb_reserve(skb, NCI_DATA_HDR_SIZE);
memcpy(skb_put(skb, data_len), data, data_len);
loopback_data.conn_id = conn_id;
loopback_data.data = skb;
ndev->cur_conn_id = conn_id;
r = nci_request(ndev, nci_send_data_req, (unsigned long)&loopback_data,
msecs_to_jiffies(NCI_DATA_TIMEOUT));
if (r == NCI_STATUS_OK && resp)
*resp = conn_info->rx_skb;
return r;
}
EXPORT_SYMBOL(nci_nfcc_loopback);
static int nci_open_device(struct nci_dev *ndev)
{
int rc = 0;