#include "hci.h"
/*
* Payload is the HCP message data only. Instruction will be prepended.
* Guarantees that cb will be called upon completion or timeout delay
* counted from the moment the cmd is sent to the transport.
*/
int nfc_hci_hcp_message_tx(struct nfc_hci_dev *hdev, u8 pipe,
u8 type, u8 instruction,
const u8 *payload, size_t payload_len,
data_exchange_cb_t cb, void *cb_context,
unsigned long completion_delay)
{
struct nfc_dev *ndev = hdev->ndev;
struct hci_msg *cmd;
const u8 *ptr = payload;
int hci_len, err;
bool firstfrag = true;
cmd = kzalloc(sizeof(struct hci_msg), GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
INIT_LIST_HEAD(&cmd->msg_l);
skb_queue_head_init(&cmd->msg_frags);
cmd->wait_response = (type == NFC_HCI_HCP_COMMAND) ? true : false;
cmd->cb = cb;
cmd->cb_context = cb_context;
cmd->completion_delay = completion_delay;
hci_len = payload_len + 1;
while (hci_len > 0) {
struct sk_buff *skb;
int skb_len, data_link_len;
struct hcp_packet *packet;
if (NFC_HCI_HCP_PACKET_HEADER_LEN + hci_len <=
hdev->max_data_link_payload)
data_link_len = hci_len;
else
data_link_len = hdev->max_data_link_payload -
NFC_HCI_HCP_PACKET_HEADER_LEN;
skb_len = ndev->tx_headroom + NFC_HCI_HCP_PACKET_HEADER_LEN +
data_link_len + ndev->tx_tailroom;
hci_len -= data_link_len;
skb = alloc_skb(skb_len, GFP_KERNEL);
if (skb == NULL) {
err = -ENOMEM;
goto out_skb_err;
}
skb_reserve(skb, ndev->tx_headroom);
skb_put(skb, NFC_HCI_HCP_PACKET_HEADER_LEN + data_link_len);
/* Only the last fragment will have the cb bit set to 1 */
packet = (struct hcp_packet *)skb->data;
packet->header = pipe;
if (firstfrag) {
firstfrag = false;
packet->message.header = HCP_HEADER(type, instruction);
if (ptr) {
memcpy(packet->message.data, ptr,
data_link_len - 1);
ptr += data_link_len - 1;
}
} else {
memcpy(&packet->message, ptr, data_link_len);
ptr += data_link_len;
}
/* This is the last fragment, set the cb bit */
if (hci_len == 0)
packet->header |= ~NFC_HCI_FRAGMENT;
skb_queue_tail(&cmd->msg_frags, skb);
}
mutex_lock(&hdev->msg_tx_mutex);
if (hdev->shutting_down) {
err = -ESHUTDOWN;
mutex_unlock(&hdev->msg_tx_mutex);
goto out_skb_err;
}
list_add_tail(&cmd->msg_l, &hdev->msg_tx_queue);
mutex_unlock(&hdev->msg_tx_mutex);
schedule_work(&hdev->msg_tx_work);
return 0;
out_skb_err:
skb_queue_purge(&cmd->msg_frags);
kfree(cmd);
return err;
}
/*
* Receive hcp message for pipe, with type and cmd.
* skb contains optional message data only.
*/
void nfc_hci_hcp_message_rx(struct nfc_hci_dev *hdev, u8 pipe, u8 type,
u8 instruction, struct sk_buff *skb)
{
switch (type) {
case NFC_HCI_HCP_RESPONSE:
nfc_hci_resp_received(hdev, instruction, skb);
break;
case NFC_HCI_HCP_COMMAND:
nfc_hci_cmd_received(hdev, pipe, instruction, skb);
break;
case NFC_HCI_HCP_EVENT:
nfc_hci_event_received(hdev, pipe, instruction, skb);
break;
default:
pr_err("UNKNOWN MSG Type %d, instruction=%d\n",
type, instruction);
kfree_skb(skb);
break;
}
}
d>1 | -0/+1 |
2017-02-10 | net: sunrpc: fix build errors when linux/phy*.h is removed from net/dsa.h | Russell King | 1 | -0/+1 |
2017-02-10 | net: Fix checkpatch, Missing a blank line after declarations | tcharding | 1 | -0/+13 |
2017-02-10 | net: Fix checkpatch block comments warnings | tcharding | 1 | -32/+33 |
2017-02-10 | net: Fix checkpatch whitespace errors | tcharding | 1 | -19/+20 |
2017-02-10 | net: Fix checkpatch WARNING: please, no space before tabs | tcharding | 1 | -71/+71 |
2017-02-10 | net/act_pedit: Introduce 'add' operation | Amir Vadai | 1 | -4/+26 |
2017-02-10 | net/act_pedit: Support using offset relative to the conventional network headers | Amir Vadai | 1 | -16/+180 |
2017-02-10 | switchdev: bridge: Offload mc router ports | Nogah Frankel | 1 | -0/+15 |
2017-02-10 | bridge: mcast: Merge the mc router ports deletions to one function | Nogah Frankel | 1 | -15/+9 |
2017-02-10 | switchdev: bridge: Offload multicast disabled | Nogah Frankel | 1 | -0/+16 |
2017-02-10 | sched: check negative err value to safe one level of indent | Jiri Pirko | 1 | -13/+9 |
2017-02-10 | sched: add missing curly braces in else branch in tc_ctl_tfilter | Jiri Pirko | 1 | -1/+2 |
2017-02-10 | sched: move err set right before goto errout in tc_ctl_tfilter | Jiri Pirko | 1 | -10/+19 |
2017-02-10 | sched: push TC filter protocol creation into a separate function | Jiri Pirko | 1 | -51/+59 |
2017-02-10 | sched: move tcf_proto_destroy and tcf_destroy_chain helpers into cls_api | Jiri Pirko | 13 | -24/+32 |
2017-02-10 | sched: rename tcf_destroy to tcf_destroy_proto | Jiri Pirko | 2 | -6/+6 |
2017-02-10 | ipv4: fib: Add events for FIB replace and append | Ido Schimmel | 1 | -13/+14 |
2017-02-10 | ipv4: fib: Send notification before deleting FIB alias | Ido Schimmel | 1 | -7/+7 |
2017-02-10 | ipv4: fib: Send deletion notification with actual FIB alias type | Ido Schimmel | 1 | -2/+2 |
2017-02-10 | ipv4: fib: Only flush FIB aliases belonging to currently flushed table | Ido Schimmel | 1 | -1/+2 |
2017-02-09 | openvswitch: Pack struct sw_flow_key. | Jarno Rajahalme | 4 | -34/+39 |
2017-02-09 | openvswitch: Add force commit. | Jarno Rajahalme | 1 | -2/+24 |
2017-02-09 | openvswitch: Add original direction conntrack tuple to sw_flow_key. | Jarno Rajahalme |