// SPDX-License-Identifier: GPL-2.0-only
|
/*
|
* The NFC Controller Interface is the communication protocol between an
|
* NFC Controller (NFCC) and a Device Host (DH).
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* This is the HCI over NCI implementation, as specified in the 10.2
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* section of the NCI 1.1 specification.
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*
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* Copyright (C) 2014 STMicroelectronics SAS. All rights reserved.
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*/
|
|
#include <linux/skbuff.h>
|
|
#include "../nfc.h"
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#include <net/nfc/nci.h>
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#include <net/nfc/nci_core.h>
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#include <linux/nfc.h>
|
|
struct nci_data {
|
u8 conn_id;
|
u8 pipe;
|
u8 cmd;
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const u8 *data;
|
u32 data_len;
|
} __packed;
|
|
struct nci_hci_create_pipe_params {
|
u8 src_gate;
|
u8 dest_host;
|
u8 dest_gate;
|
} __packed;
|
|
struct nci_hci_create_pipe_resp {
|
u8 src_host;
|
u8 src_gate;
|
u8 dest_host;
|
u8 dest_gate;
|
u8 pipe;
|
} __packed;
|
|
struct nci_hci_delete_pipe_noti {
|
u8 pipe;
|
} __packed;
|
|
struct nci_hci_all_pipe_cleared_noti {
|
u8 host;
|
} __packed;
|
|
struct nci_hcp_message {
|
u8 header; /* type -cmd,evt,rsp- + instruction */
|
u8 data[];
|
} __packed;
|
|
struct nci_hcp_packet {
|
u8 header; /* cbit+pipe */
|
struct nci_hcp_message message;
|
} __packed;
|
|
#define NCI_HCI_ANY_SET_PARAMETER 0x01
|
#define NCI_HCI_ANY_GET_PARAMETER 0x02
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#define NCI_HCI_ANY_CLOSE_PIPE 0x04
|
#define NCI_HCI_ADM_CLEAR_ALL_PIPE 0x14
|
|
#define NCI_HFP_NO_CHAINING 0x80
|
|
#define NCI_NFCEE_ID_HCI 0x80
|
|
#define NCI_EVT_HOT_PLUG 0x03
|
|
#define NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY 0x01
|
#define NCI_HCI_ADM_CREATE_PIPE 0x10
|
#define NCI_HCI_ADM_DELETE_PIPE 0x11
|
|
/* HCP headers */
|
#define NCI_HCI_HCP_PACKET_HEADER_LEN 1
|
#define NCI_HCI_HCP_MESSAGE_HEADER_LEN 1
|
#define NCI_HCI_HCP_HEADER_LEN 2
|
|
/* HCP types */
|
#define NCI_HCI_HCP_COMMAND 0x00
|
#define NCI_HCI_HCP_EVENT 0x01
|
#define NCI_HCI_HCP_RESPONSE 0x02
|
|
#define NCI_HCI_ADM_NOTIFY_PIPE_CREATED 0x12
|
#define NCI_HCI_ADM_NOTIFY_PIPE_DELETED 0x13
|
#define NCI_HCI_ADM_NOTIFY_ALL_PIPE_CLEARED 0x15
|
|
#define NCI_HCI_FRAGMENT 0x7f
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#define NCI_HCP_HEADER(type, instr) ((((type) & 0x03) << 6) |\
|
((instr) & 0x3f))
|
|
#define NCI_HCP_MSG_GET_TYPE(header) ((header & 0xc0) >> 6)
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#define NCI_HCP_MSG_GET_CMD(header) (header & 0x3f)
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#define NCI_HCP_MSG_GET_PIPE(header) (header & 0x7f)
|
|
static int nci_hci_result_to_errno(u8 result)
|
{
|
switch (result) {
|
case NCI_HCI_ANY_OK:
|
return 0;
|
case NCI_HCI_ANY_E_REG_PAR_UNKNOWN:
|
return -EOPNOTSUPP;
|
case NCI_HCI_ANY_E_TIMEOUT:
|
return -ETIME;
|
default:
|
return -1;
|
}
|
}
|
|
/* HCI core */
|
static void nci_hci_reset_pipes(struct nci_hci_dev *hdev)
|
{
|
int i;
|
|
for (i = 0; i < NCI_HCI_MAX_PIPES; i++) {
|
hdev->pipes[i].gate = NCI_HCI_INVALID_GATE;
|
hdev->pipes[i].host = NCI_HCI_INVALID_HOST;
|
}
|
memset(hdev->gate2pipe, NCI_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe));
|
}
|
|
static void nci_hci_reset_pipes_per_host(struct nci_dev *ndev, u8 host)
|
{
|
int i;
|
|
for (i = 0; i < NCI_HCI_MAX_PIPES; i++) {
|
if (ndev->hci_dev->pipes[i].host == host) {
|
ndev->hci_dev->pipes[i].gate = NCI_HCI_INVALID_GATE;
|
ndev->hci_dev->pipes[i].host = NCI_HCI_INVALID_HOST;
|
}
|
}
|
}
|
|
/* Fragment HCI data over NCI packet.
|
* NFC Forum NCI 10.2.2 Data Exchange:
|
* The payload of the Data Packets sent on the Logical Connection SHALL be
|
* valid HCP packets, as defined within [ETSI_102622]. Each Data Packet SHALL
|
* contain a single HCP packet. NCI Segmentation and Reassembly SHALL NOT be
|
* applied to Data Messages in either direction. The HCI fragmentation mechanism
|
* is used if required.
|
*/
|
static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe,
|
const u8 data_type, const u8 *data,
|
size_t data_len)
|
{
|
struct nci_conn_info *conn_info;
|
struct sk_buff *skb;
|
int len, i, r;
|
u8 cb = pipe;
|
|
conn_info = ndev->hci_dev->conn_info;
|
if (!conn_info)
|
return -EPROTO;
|
|
i = 0;
|
skb = nci_skb_alloc(ndev, conn_info->max_pkt_payload_len +
|
NCI_DATA_HDR_SIZE, GFP_ATOMIC);
|
if (!skb)
|
return -ENOMEM;
|
|
skb_reserve(skb, NCI_DATA_HDR_SIZE + 2);
|
*(u8 *)skb_push(skb, 1) = data_type;
|
|
do {
|
len = conn_info->max_pkt_payload_len;
|
|
/* If last packet add NCI_HFP_NO_CHAINING */
|
if (i + conn_info->max_pkt_payload_len -
|
(skb->len + 1) >= data_len) {
|
cb |= NCI_HFP_NO_CHAINING;
|
len = data_len - i;
|
} else {
|
len = conn_info->max_pkt_payload_len - skb->len - 1;
|
}
|
|
*(u8 *)skb_push(skb, 1) = cb;
|
|
if (len > 0)
|
skb_put_data(skb, data + i, len);
|
|
r = nci_send_data(ndev, conn_info->conn_id, skb);
|
if (r < 0)
|
return r;
|
|
i += len;
|
|
if (i < data_len) {
|
skb = nci_skb_alloc(ndev,
|
conn_info->max_pkt_payload_len +
|
NCI_DATA_HDR_SIZE, GFP_ATOMIC);
|
if (!skb)
|
return -ENOMEM;
|
|
skb_reserve(skb, NCI_DATA_HDR_SIZE + 1);
|
}
|
} while (i < data_len);
|
|
return i;
|
}
|
|
static void nci_hci_send_data_req(struct nci_dev *ndev, unsigned long opt)
|
{
|
struct nci_data *data = (struct nci_data *)opt;
|
|
nci_hci_send_data(ndev, data->pipe, data->cmd,
|
data->data, data->data_len);
|
}
|
|
int nci_hci_send_event(struct nci_dev *ndev, u8 gate, u8 event,
|
const u8 *param, size_t param_len)
|
{
|
u8 pipe = ndev->hci_dev->gate2pipe[gate];
|
|
if (pipe == NCI_HCI_INVALID_PIPE)
|
return -EADDRNOTAVAIL;
|
|
return nci_hci_send_data(ndev, pipe,
|
NCI_HCP_HEADER(NCI_HCI_HCP_EVENT, event),
|
param, param_len);
|
}
|
EXPORT_SYMBOL(nci_hci_send_event);
|
|
int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate, u8 cmd,
|
const u8 *param, size_t param_len,
|
struct sk_buff **skb)
|
{
|
struct nci_hcp_message *message;
|
struct nci_conn_info *conn_info;
|
struct nci_data data;
|
int r;
|
u8 pipe = ndev->hci_dev->gate2pipe[gate];
|
|
if (pipe == NCI_HCI_INVALID_PIPE)
|
return -EADDRNOTAVAIL;
|
|
conn_info = ndev->hci_dev->conn_info;
|
if (!conn_info)
|
return -EPROTO;
|
|
data.conn_id = conn_info->conn_id;
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data.pipe = pipe;
|
data.cmd = NCI_HCP_HEADER(NCI_HCI_HCP_COMMAND, cmd);
|
data.data = param;
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data.data_len = param_len;
|
|
r = nci_request(ndev, nci_hci_send_data_req, (unsigned long)&data,
|
msecs_to_jiffies(NCI_DATA_TIMEOUT));
|
if (r == NCI_STATUS_OK) {
|
message = (struct nci_hcp_message *)conn_info->rx_skb->data;
|
r = nci_hci_result_to_errno(
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NCI_HCP_MSG_GET_CMD(message->header));
|
skb_pull(conn_info->rx_skb, NCI_HCI_HCP_MESSAGE_HEADER_LEN);
|
|
if (!r && skb)
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*skb = conn_info->rx_skb;
|
}
|
|
return r;
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}
|
EXPORT_SYMBOL(nci_hci_send_cmd);
|
|
int nci_hci_clear_all_pipes(struct nci_dev *ndev)
|
{
|
int r;
|
|
r = nci_hci_send_cmd(ndev, NCI_HCI_ADMIN_GATE,
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NCI_HCI_ADM_CLEAR_ALL_PIPE, NULL, 0, NULL);
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if (r < 0)
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return r;
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|
nci_hci_reset_pipes(ndev->hci_dev);
|
return r;
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}
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EXPORT_SYMBOL(nci_hci_clear_all_pipes);
|
|
static void nci_hci_event_received(struct nci_dev *ndev, u8 pipe,
|
u8 event, struct sk_buff *skb)
|
{
|
if (ndev->ops->hci_event_received)
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ndev->ops->hci_event_received(ndev, pipe, event, skb);
|
}
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|
static void nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe,
|
u8 cmd, struct sk_buff *skb)
|
{
|
u8 gate = ndev->hci_dev->pipes[pipe].gate;
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u8 status = NCI_HCI_ANY_OK | ~NCI_HCI_FRAGMENT;
|
u8 dest_gate, new_pipe;
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struct nci_hci_create_pipe_resp *create_info;
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struct nci_hci_delete_pipe_noti *delete_info;
|
struct nci_hci_all_pipe_cleared_noti *cleared_info;
|
|
pr_debug("from gate %x pipe %x cmd %x\n", gate, pipe, cmd);
|
|
switch (cmd) {
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case NCI_HCI_ADM_NOTIFY_PIPE_CREATED:
|
if (skb->len != 5) {
|
status = NCI_HCI_ANY_E_NOK;
|
goto exit;
|
}
|
create_info = (struct nci_hci_create_pipe_resp *)skb->data;
|
dest_gate = create_info->dest_gate;
|
new_pipe = create_info->pipe;
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if (new_pipe >= NCI_HCI_MAX_PIPES) {
|
status = NCI_HCI_ANY_E_NOK;
|
goto exit;
|
}
|
|
/* Save the new created pipe and bind with local gate,
|
* the description for skb->data[3] is destination gate id
|
* but since we received this cmd from host controller, we
|
* are the destination and it is our local gate
|
*/
|
ndev->hci_dev->gate2pipe[dest_gate] = new_pipe;
|
ndev->hci_dev->pipes[new_pipe].gate = dest_gate;
|
ndev->hci_dev->pipes[new_pipe].host =
|
create_info->src_host;
|
break;
|
case NCI_HCI_ANY_OPEN_PIPE:
|
/* If the pipe is not created report an error */
|
if (gate == NCI_HCI_INVALID_GATE) {
|
status = NCI_HCI_ANY_E_NOK;
|
goto exit;
|
}
|
break;
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case NCI_HCI_ADM_NOTIFY_PIPE_DELETED:
|
if (skb->len != 1) {
|
status = NCI_HCI_ANY_E_NOK;
|
goto exit;
|
}
|
delete_info = (struct nci_hci_delete_pipe_noti *)skb->data;
|
if (delete_info->pipe >= NCI_HCI_MAX_PIPES) {
|
status = NCI_HCI_ANY_E_NOK;
|
goto exit;
|
}
|
|
ndev->hci_dev->pipes[delete_info->pipe].gate =
|
NCI_HCI_INVALID_GATE;
|
ndev->hci_dev->pipes[delete_info->pipe].host =
|
NCI_HCI_INVALID_HOST;
|
break;
|
case NCI_HCI_ADM_NOTIFY_ALL_PIPE_CLEARED:
|
if (skb->len != 1) {
|
status = NCI_HCI_ANY_E_NOK;
|
goto exit;
|
}
|
|
cleared_info =
|
(struct nci_hci_all_pipe_cleared_noti *)skb->data;
|
nci_hci_reset_pipes_per_host(ndev, cleared_info->host);
|
break;
|
default:
|
pr_debug("Discarded unknown cmd %x to gate %x\n", cmd, gate);
|
break;
|
}
|
|
if (ndev->ops->hci_cmd_received)
|
ndev->ops->hci_cmd_received(ndev, pipe, cmd, skb);
|
|
exit:
|
nci_hci_send_data(ndev, pipe, status, NULL, 0);
|
|
kfree_skb(skb);
|
}
|
|
static void nci_hci_resp_received(struct nci_dev *ndev, u8 pipe,
|
u8 result, struct sk_buff *skb)
|
{
|
struct nci_conn_info *conn_info;
|
u8 status = result;
|
|
conn_info = ndev->hci_dev->conn_info;
|
if (!conn_info) {
|
status = NCI_STATUS_REJECTED;
|
goto exit;
|
}
|
|
conn_info->rx_skb = skb;
|
|
exit:
|
nci_req_complete(ndev, NCI_STATUS_OK);
|
}
|
|
/* Receive hcp message for pipe, with type and cmd.
|
* skb contains optional message data only.
|
*/
|
static void nci_hci_hcp_message_rx(struct nci_dev *ndev, u8 pipe,
|
u8 type, u8 instruction, struct sk_buff *skb)
|
{
|
switch (type) {
|
case NCI_HCI_HCP_RESPONSE:
|
nci_hci_resp_received(ndev, pipe, instruction, skb);
|
break;
|
case NCI_HCI_HCP_COMMAND:
|
nci_hci_cmd_received(ndev, pipe, instruction, skb);
|
break;
|
case NCI_HCI_HCP_EVENT:
|
nci_hci_event_received(ndev, pipe, instruction, skb);
|
break;
|
default:
|
pr_err("UNKNOWN MSG Type %d, instruction=%d\n",
|
type, instruction);
|
kfree_skb(skb);
|
break;
|
}
|
|
nci_req_complete(ndev, NCI_STATUS_OK);
|
}
|
|
static void nci_hci_msg_rx_work(struct work_struct *work)
|
{
|
struct nci_hci_dev *hdev =
|
container_of(work, struct nci_hci_dev, msg_rx_work);
|
struct sk_buff *skb;
|
struct nci_hcp_message *message;
|
u8 pipe, type, instruction;
|
|
while ((skb = skb_dequeue(&hdev->msg_rx_queue)) != NULL) {
|
pipe = NCI_HCP_MSG_GET_PIPE(skb->data[0]);
|
skb_pull(skb, NCI_HCI_HCP_PACKET_HEADER_LEN);
|
message = (struct nci_hcp_message *)skb->data;
|
type = NCI_HCP_MSG_GET_TYPE(message->header);
|
instruction = NCI_HCP_MSG_GET_CMD(message->header);
|
skb_pull(skb, NCI_HCI_HCP_MESSAGE_HEADER_LEN);
|
|
nci_hci_hcp_message_rx(hdev->ndev, pipe,
|
type, instruction, skb);
|
}
|
}
|
|
void nci_hci_data_received_cb(void *context,
|
struct sk_buff *skb, int err)
|
{
|
struct nci_dev *ndev = (struct nci_dev *)context;
|
struct nci_hcp_packet *packet;
|
u8 pipe, type;
|
struct sk_buff *hcp_skb;
|
struct sk_buff *frag_skb;
|
int msg_len;
|
|
pr_debug("\n");
|
|
if (err) {
|
nci_req_complete(ndev, err);
|
return;
|
}
|
|
packet = (struct nci_hcp_packet *)skb->data;
|
if ((packet->header & ~NCI_HCI_FRAGMENT) == 0) {
|
skb_queue_tail(&ndev->hci_dev->rx_hcp_frags, skb);
|
return;
|
}
|
|
/* it's the last fragment. Does it need re-aggregation? */
|
if (skb_queue_len(&ndev->hci_dev->rx_hcp_frags)) {
|
pipe = NCI_HCP_MSG_GET_PIPE(packet->header);
|
skb_queue_tail(&ndev->hci_dev->rx_hcp_frags, skb);
|
|
msg_len = 0;
|
skb_queue_walk(&ndev->hci_dev->rx_hcp_frags, frag_skb) {
|
msg_len += (frag_skb->len -
|
NCI_HCI_HCP_PACKET_HEADER_LEN);
|
}
|
|
hcp_skb = nfc_alloc_recv_skb(NCI_HCI_HCP_PACKET_HEADER_LEN +
|
msg_len, GFP_KERNEL);
|
if (!hcp_skb) {
|
nci_req_complete(ndev, -ENOMEM);
|
return;
|
}
|
|
skb_put_u8(hcp_skb, pipe);
|
|
skb_queue_walk(&ndev->hci_dev->rx_hcp_frags, frag_skb) {
|
msg_len = frag_skb->len - NCI_HCI_HCP_PACKET_HEADER_LEN;
|
skb_put_data(hcp_skb,
|
frag_skb->data + NCI_HCI_HCP_PACKET_HEADER_LEN,
|
msg_len);
|
}
|
|
skb_queue_purge(&ndev->hci_dev->rx_hcp_frags);
|
} else {
|
packet->header &= NCI_HCI_FRAGMENT;
|
hcp_skb = skb;
|
}
|
|
/* if this is a response, dispatch immediately to
|
* unblock waiting cmd context. Otherwise, enqueue to dispatch
|
* in separate context where handler can also execute command.
|
*/
|
packet = (struct nci_hcp_packet *)hcp_skb->data;
|
type = NCI_HCP_MSG_GET_TYPE(packet->message.header);
|
if (type == NCI_HCI_HCP_RESPONSE) {
|
pipe = NCI_HCP_MSG_GET_PIPE(packet->header);
|
skb_pull(hcp_skb, NCI_HCI_HCP_PACKET_HEADER_LEN);
|
nci_hci_hcp_message_rx(ndev, pipe, type,
|
NCI_STATUS_OK, hcp_skb);
|
} else {
|
skb_queue_tail(&ndev->hci_dev->msg_rx_queue, hcp_skb);
|
schedule_work(&ndev->hci_dev->msg_rx_work);
|
}
|
}
|
|
int nci_hci_open_pipe(struct nci_dev *ndev, u8 pipe)
|
{
|
struct nci_data data;
|
struct nci_conn_info *conn_info;
|
|
conn_info = ndev->hci_dev->conn_info;
|
if (!conn_info)
|
return -EPROTO;
|
|
data.conn_id = conn_info->conn_id;
|
data.pipe = pipe;
|
data.cmd = NCI_HCP_HEADER(NCI_HCI_HCP_COMMAND,
|
NCI_HCI_ANY_OPEN_PIPE);
|
data.data = NULL;
|
data.data_len = 0;
|
|
return nci_request(ndev, nci_hci_send_data_req,
|
(unsigned long)&data,
|
msecs_to_jiffies(NCI_DATA_TIMEOUT));
|
}
|
EXPORT_SYMBOL(nci_hci_open_pipe);
|
|
static u8 nci_hci_create_pipe(struct nci_dev *ndev, u8 dest_host,
|
u8 dest_gate, int *result)
|
{
|
u8 pipe;
|
struct sk_buff *skb;
|
struct nci_hci_create_pipe_params params;
|
struct nci_hci_create_pipe_resp *resp;
|
|
pr_debug("gate=%d\n", dest_gate);
|
|
params.src_gate = NCI_HCI_ADMIN_GATE;
|
params.dest_host = dest_host;
|
params.dest_gate = dest_gate;
|
|
*result = nci_hci_send_cmd(ndev, NCI_HCI_ADMIN_GATE,
|
NCI_HCI_ADM_CREATE_PIPE,
|
(u8 *)¶ms, sizeof(params), &skb);
|
if (*result < 0)
|
return NCI_HCI_INVALID_PIPE;
|
|
resp = (struct nci_hci_create_pipe_resp *)skb->data;
|
pipe = resp->pipe;
|
kfree_skb(skb);
|
|
pr_debug("pipe created=%d\n", pipe);
|
|
return pipe;
|
}
|
|
static int nci_hci_delete_pipe(struct nci_dev *ndev, u8 pipe)
|
{
|
pr_debug("\n");
|
|
return nci_hci_send_cmd(ndev, NCI_HCI_ADMIN_GATE,
|
NCI_HCI_ADM_DELETE_PIPE, &pipe, 1, NULL);
|
}
|
|
int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx,
|
const u8 *param, size_t param_len)
|
{
|
struct nci_hcp_message *message;
|
struct nci_conn_info *conn_info;
|
struct nci_data data;
|
int r;
|
u8 *tmp;
|
u8 pipe = ndev->hci_dev->gate2pipe[gate];
|
|
pr_debug("idx=%d to gate %d\n", idx, gate);
|
|
if (pipe == NCI_HCI_INVALID_PIPE)
|
return -EADDRNOTAVAIL;
|
|
conn_info = ndev->hci_dev->conn_info;
|
if (!conn_info)
|
return -EPROTO;
|
|
tmp = kmalloc(1 + param_len, GFP_KERNEL);
|
if (!tmp)
|
return -ENOMEM;
|
|
*tmp = idx;
|
memcpy(tmp + 1, param, param_len);
|
|
data.conn_id = conn_info->conn_id;
|
data.pipe = pipe;
|
data.cmd = NCI_HCP_HEADER(NCI_HCI_HCP_COMMAND,
|
NCI_HCI_ANY_SET_PARAMETER);
|
data.data = tmp;
|
data.data_len = param_len + 1;
|
|
r = nci_request(ndev, nci_hci_send_data_req,
|
(unsigned long)&data,
|
msecs_to_jiffies(NCI_DATA_TIMEOUT));
|
if (r == NCI_STATUS_OK) {
|
message = (struct nci_hcp_message *)conn_info->rx_skb->data;
|
r = nci_hci_result_to_errno(
|
NCI_HCP_MSG_GET_CMD(message->header));
|
skb_pull(conn_info->rx_skb, NCI_HCI_HCP_MESSAGE_HEADER_LEN);
|
}
|
|
kfree(tmp);
|
return r;
|
}
|
EXPORT_SYMBOL(nci_hci_set_param);
|
|
int nci_hci_get_param(struct nci_dev *ndev, u8 gate, u8 idx,
|
struct sk_buff **skb)
|
{
|
struct nci_hcp_message *message;
|
struct nci_conn_info *conn_info;
|
struct nci_data data;
|
int r;
|
u8 pipe = ndev->hci_dev->gate2pipe[gate];
|
|
pr_debug("idx=%d to gate %d\n", idx, gate);
|
|
if (pipe == NCI_HCI_INVALID_PIPE)
|
return -EADDRNOTAVAIL;
|
|
conn_info = ndev->hci_dev->conn_info;
|
if (!conn_info)
|
return -EPROTO;
|
|
data.conn_id = conn_info->conn_id;
|
data.pipe = pipe;
|
data.cmd = NCI_HCP_HEADER(NCI_HCI_HCP_COMMAND,
|
NCI_HCI_ANY_GET_PARAMETER);
|
data.data = &idx;
|
data.data_len = 1;
|
|
r = nci_request(ndev, nci_hci_send_data_req, (unsigned long)&data,
|
msecs_to_jiffies(NCI_DATA_TIMEOUT));
|
|
if (r == NCI_STATUS_OK) {
|
message = (struct nci_hcp_message *)conn_info->rx_skb->data;
|
r = nci_hci_result_to_errno(
|
NCI_HCP_MSG_GET_CMD(message->header));
|
skb_pull(conn_info->rx_skb, NCI_HCI_HCP_MESSAGE_HEADER_LEN);
|
|
if (!r && skb)
|
*skb = conn_info->rx_skb;
|
}
|
|
return r;
|
}
|
EXPORT_SYMBOL(nci_hci_get_param);
|
|
int nci_hci_connect_gate(struct nci_dev *ndev,
|
u8 dest_host, u8 dest_gate, u8 pipe)
|
{
|
bool pipe_created = false;
|
int r;
|
|
if (pipe == NCI_HCI_DO_NOT_OPEN_PIPE)
|
return 0;
|
|
if (ndev->hci_dev->gate2pipe[dest_gate] != NCI_HCI_INVALID_PIPE)
|
return -EADDRINUSE;
|
|
if (pipe != NCI_HCI_INVALID_PIPE)
|
goto open_pipe;
|
|
switch (dest_gate) {
|
case NCI_HCI_LINK_MGMT_GATE:
|
pipe = NCI_HCI_LINK_MGMT_PIPE;
|
break;
|
case NCI_HCI_ADMIN_GATE:
|
pipe = NCI_HCI_ADMIN_PIPE;
|
break;
|
default:
|
pipe = nci_hci_create_pipe(ndev, dest_host, dest_gate, &r);
|
if (pipe == NCI_HCI_INVALID_PIPE)
|
return r;
|
pipe_created = true;
|
break;
|
}
|
|
open_pipe:
|
r = nci_hci_open_pipe(ndev, pipe);
|
if (r < 0) {
|
if (pipe_created) {
|
if (nci_hci_delete_pipe(ndev, pipe) < 0) {
|
/* TODO: Cannot clean by deleting pipe...
|
* -> inconsistent state
|
*/
|
}
|
}
|
return r;
|
}
|
|
ndev->hci_dev->pipes[pipe].gate = dest_gate;
|
ndev->hci_dev->pipes[pipe].host = dest_host;
|
ndev->hci_dev->gate2pipe[dest_gate] = pipe;
|
|
return 0;
|
}
|
EXPORT_SYMBOL(nci_hci_connect_gate);
|
|
static int nci_hci_dev_connect_gates(struct nci_dev *ndev,
|
u8 gate_count,
|
struct nci_hci_gate *gates)
|
{
|
int r;
|
|
while (gate_count--) {
|
r = nci_hci_connect_gate(ndev, gates->dest_host,
|
gates->gate, gates->pipe);
|
if (r < 0)
|
return r;
|
gates++;
|
}
|
|
return 0;
|
}
|
|
int nci_hci_dev_session_init(struct nci_dev *ndev)
|
{
|
struct nci_conn_info *conn_info;
|
struct sk_buff *skb;
|
int r;
|
|
ndev->hci_dev->count_pipes = 0;
|
ndev->hci_dev->expected_pipes = 0;
|
|
conn_info = ndev->hci_dev->conn_info;
|
if (!conn_info)
|
return -EPROTO;
|
|
conn_info->data_exchange_cb = nci_hci_data_received_cb;
|
conn_info->data_exchange_cb_context = ndev;
|
|
nci_hci_reset_pipes(ndev->hci_dev);
|
|
if (ndev->hci_dev->init_data.gates[0].gate != NCI_HCI_ADMIN_GATE)
|
return -EPROTO;
|
|
r = nci_hci_connect_gate(ndev,
|
ndev->hci_dev->init_data.gates[0].dest_host,
|
ndev->hci_dev->init_data.gates[0].gate,
|
ndev->hci_dev->init_data.gates[0].pipe);
|
if (r < 0)
|
return r;
|
|
r = nci_hci_get_param(ndev, NCI_HCI_ADMIN_GATE,
|
NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY, &skb);
|
if (r < 0)
|
return r;
|
|
if (skb->len &&
|
skb->len == strlen(ndev->hci_dev->init_data.session_id) &&
|
!memcmp(ndev->hci_dev->init_data.session_id, skb->data, skb->len) &&
|
ndev->ops->hci_load_session) {
|
/* Restore gate<->pipe table from some proprietary location. */
|
r = ndev->ops->hci_load_session(ndev);
|
} else {
|
r = nci_hci_clear_all_pipes(ndev);
|
if (r < 0)
|
goto exit;
|
|
r = nci_hci_dev_connect_gates(ndev,
|
ndev->hci_dev->init_data.gate_count,
|
ndev->hci_dev->init_data.gates);
|
if (r < 0)
|
goto exit;
|
|
r = nci_hci_set_param(ndev, NCI_HCI_ADMIN_GATE,
|
NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY,
|
ndev->hci_dev->init_data.session_id,
|
strlen(ndev->hci_dev->init_data.session_id));
|
}
|
|
exit:
|
kfree_skb(skb);
|
|
return r;
|
}
|
EXPORT_SYMBOL(nci_hci_dev_session_init);
|
|
struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev)
|
{
|
struct nci_hci_dev *hdev;
|
|
hdev = kzalloc(sizeof(*hdev), GFP_KERNEL);
|
if (!hdev)
|
return NULL;
|
|
skb_queue_head_init(&hdev->rx_hcp_frags);
|
INIT_WORK(&hdev->msg_rx_work, nci_hci_msg_rx_work);
|
skb_queue_head_init(&hdev->msg_rx_queue);
|
hdev->ndev = ndev;
|
|
return hdev;
|
}
|
|
void nci_hci_deallocate(struct nci_dev *ndev)
|
{
|
kfree(ndev->hci_dev);
|
}
|
