Orange Pi5 kernel

// 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).
 *  This is the HCI over NCI implementation, as specified in the 10.2
 *  section of the NCI 1.1 specification.
 *
 *  Copyright (C) 2014  STMicroelectronics SAS. All rights reserved.
 */
 
#include <linux/skbuff.h>
 
#include "../nfc.h"
#include <net/nfc/nci.h>
#include <net/nfc/nci_core.h>
#include <linux/nfc.h>
 
struct nci_data {
<------>u8              conn_id;
<------>u8              pipe;
<------>u8              cmd;
<------>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
#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
#define NCI_HCP_HEADER(type, instr) ((((type) & 0x03) << 6) |\
<------><------><------><------>      ((instr) & 0x3f))
 
#define NCI_HCP_MSG_GET_TYPE(header) ((header & 0xc0) >> 6)
#define NCI_HCP_MSG_GET_CMD(header)  (header & 0x3f)
#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_KERNEL);
<------>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_KERNEL);
<------><------><------>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;
<------>data.pipe = pipe;
<------>data.cmd = NCI_HCP_HEADER(NCI_HCI_HCP_COMMAND, cmd);
<------>data.data = param;
<------>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(
<------><------><------>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_send_cmd);
 
int nci_hci_clear_all_pipes(struct nci_dev *ndev)
{
<------>int r;
 
<------>r = nci_hci_send_cmd(ndev, NCI_HCI_ADMIN_GATE,
<------><------><------>     NCI_HCI_ADM_CLEAR_ALL_PIPE, NULL, 0, NULL);
<------>if (r < 0)
<------><------>return r;
 
<------>nci_hci_reset_pipes(ndev->hci_dev);
<------>return r;
}
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)
<------><------>ndev->ops->hci_event_received(ndev, pipe, event, skb);
}
 
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;
<------>u8 status = NCI_HCI_ANY_OK | ~NCI_HCI_FRAGMENT;
<------>u8 dest_gate, new_pipe;
<------>struct nci_hci_create_pipe_resp *create_info;
<------>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) {
<------>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;
<------><------>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;
<------>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 *)&params, 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);
}