linux/net/nfc/nci/hci.c

// 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>
#include <linux/kcov.h>

struct nci_data { … } __packed;

struct nci_hci_create_pipe_params { … } __packed;

struct nci_hci_create_pipe_resp { … } __packed;

struct nci_hci_delete_pipe_noti { … } __packed;

struct nci_hci_all_pipe_cleared_noti { … } __packed;

struct nci_hcp_message { … } __packed;

struct nci_hcp_packet { … } __packed;

#define NCI_HCI_ANY_SET_PARAMETER …
#define NCI_HCI_ANY_GET_PARAMETER …
#define NCI_HCI_ANY_CLOSE_PIPE …
#define NCI_HCI_ADM_CLEAR_ALL_PIPE …

#define NCI_HFP_NO_CHAINING …

#define NCI_NFCEE_ID_HCI …

#define NCI_EVT_HOT_PLUG …

#define NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY …
#define NCI_HCI_ADM_CREATE_PIPE …
#define NCI_HCI_ADM_DELETE_PIPE …

/* HCP headers */
#define NCI_HCI_HCP_PACKET_HEADER_LEN …
#define NCI_HCI_HCP_MESSAGE_HEADER_LEN …
#define NCI_HCI_HCP_HEADER_LEN …

/* HCP types */
#define NCI_HCI_HCP_COMMAND …
#define NCI_HCI_HCP_EVENT …
#define NCI_HCI_HCP_RESPONSE …

#define NCI_HCI_ADM_NOTIFY_PIPE_CREATED …
#define NCI_HCI_ADM_NOTIFY_PIPE_DELETED …
#define NCI_HCI_ADM_NOTIFY_ALL_PIPE_CLEARED …

#define NCI_HCI_FRAGMENT …
#define NCI_HCP_HEADER(type, instr) …

#define NCI_HCP_MSG_GET_TYPE(header) …
#define NCI_HCP_MSG_GET_CMD(header) …
#define NCI_HCP_MSG_GET_PIPE(header) …

static int nci_hci_result_to_errno(u8 result)
{ … }

/* HCI core */
static void nci_hci_reset_pipes(struct nci_hci_dev *hdev)
{ … }

static void nci_hci_reset_pipes_per_host(struct nci_dev *ndev, u8 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)
{ … }

static void nci_hci_send_data_req(struct nci_dev *ndev, const void *opt)
{ … }

int nci_hci_send_event(struct nci_dev *ndev, u8 gate, u8 event,
		       const u8 *param, size_t param_len)
{ … }
EXPORT_SYMBOL(…);

int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate, u8 cmd,
		     const u8 *param, size_t param_len,
		     struct sk_buff **skb)
{ … }
EXPORT_SYMBOL(…);

int nci_hci_clear_all_pipes(struct nci_dev *ndev)
{ … }
EXPORT_SYMBOL(…);

static void nci_hci_event_received(struct nci_dev *ndev, u8 pipe,
				   u8 event, struct sk_buff *skb)
{ … }

static void nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe,
				 u8 cmd, struct sk_buff *skb)
{ … }

static void nci_hci_resp_received(struct nci_dev *ndev, u8 pipe,
				  struct sk_buff *skb)
{ … }

/* 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)
{ … }

static void nci_hci_msg_rx_work(struct work_struct *work)
{ … }

void nci_hci_data_received_cb(void *context,
			      struct sk_buff *skb, int err)
{ … }

int nci_hci_open_pipe(struct nci_dev *ndev, u8 pipe)
{ … }
EXPORT_SYMBOL(…);

static u8 nci_hci_create_pipe(struct nci_dev *ndev, u8 dest_host,
			      u8 dest_gate, int *result)
{ … }

static int nci_hci_delete_pipe(struct nci_dev *ndev, u8 pipe)
{ … }

int nci_hci_set_param(struct nci_dev *ndev, u8 gate, u8 idx,
		      const u8 *param, size_t param_len)
{ … }
EXPORT_SYMBOL(…);

int nci_hci_get_param(struct nci_dev *ndev, u8 gate, u8 idx,
		      struct sk_buff **skb)
{ … }
EXPORT_SYMBOL(…);

int nci_hci_connect_gate(struct nci_dev *ndev,
			 u8 dest_host, u8 dest_gate, u8 pipe)
{ … }
EXPORT_SYMBOL(…);

static int nci_hci_dev_connect_gates(struct nci_dev *ndev,
				     u8 gate_count,
				     const struct nci_hci_gate *gates)
{ … }

int nci_hci_dev_session_init(struct nci_dev *ndev)
{ … }
EXPORT_SYMBOL(…);

struct nci_hci_dev *nci_hci_allocate(struct nci_dev *ndev)
{ … }

void nci_hci_deallocate(struct nci_dev *ndev)
{ … }