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795 lines
19 KiB
795 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
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* The NFC Controller Interface is the communication protocol between an |
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* 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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*/ |
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|
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#include <linux/skbuff.h> |
|
|
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#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> |
|
|
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struct nci_data { |
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u8 conn_id; |
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u8 pipe; |
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u8 cmd; |
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const u8 *data; |
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u32 data_len; |
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} __packed; |
|
|
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struct nci_hci_create_pipe_params { |
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u8 src_gate; |
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u8 dest_host; |
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u8 dest_gate; |
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} __packed; |
|
|
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struct nci_hci_create_pipe_resp { |
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u8 src_host; |
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u8 src_gate; |
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u8 dest_host; |
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u8 dest_gate; |
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u8 pipe; |
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} __packed; |
|
|
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struct nci_hci_delete_pipe_noti { |
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u8 pipe; |
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} __packed; |
|
|
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struct nci_hci_all_pipe_cleared_noti { |
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u8 host; |
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} __packed; |
|
|
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struct nci_hcp_message { |
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u8 header; /* type -cmd,evt,rsp- + instruction */ |
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u8 data[]; |
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} __packed; |
|
|
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struct nci_hcp_packet { |
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u8 header; /* cbit+pipe */ |
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struct nci_hcp_message message; |
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} __packed; |
|
|
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#define NCI_HCI_ANY_SET_PARAMETER 0x01 |
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#define NCI_HCI_ANY_GET_PARAMETER 0x02 |
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#define NCI_HCI_ANY_CLOSE_PIPE 0x04 |
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#define NCI_HCI_ADM_CLEAR_ALL_PIPE 0x14 |
|
|
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#define NCI_HFP_NO_CHAINING 0x80 |
|
|
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#define NCI_NFCEE_ID_HCI 0x80 |
|
|
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#define NCI_EVT_HOT_PLUG 0x03 |
|
|
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#define NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY 0x01 |
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#define NCI_HCI_ADM_CREATE_PIPE 0x10 |
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#define NCI_HCI_ADM_DELETE_PIPE 0x11 |
|
|
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/* HCP headers */ |
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#define NCI_HCI_HCP_PACKET_HEADER_LEN 1 |
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#define NCI_HCI_HCP_MESSAGE_HEADER_LEN 1 |
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#define NCI_HCI_HCP_HEADER_LEN 2 |
|
|
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/* HCP types */ |
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#define NCI_HCI_HCP_COMMAND 0x00 |
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#define NCI_HCI_HCP_EVENT 0x01 |
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#define NCI_HCI_HCP_RESPONSE 0x02 |
|
|
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#define NCI_HCI_ADM_NOTIFY_PIPE_CREATED 0x12 |
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#define NCI_HCI_ADM_NOTIFY_PIPE_DELETED 0x13 |
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#define NCI_HCI_ADM_NOTIFY_ALL_PIPE_CLEARED 0x15 |
|
|
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#define NCI_HCI_FRAGMENT 0x7f |
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#define NCI_HCP_HEADER(type, instr) ((((type) & 0x03) << 6) |\ |
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((instr) & 0x3f)) |
|
|
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#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) |
|
|
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static int nci_hci_result_to_errno(u8 result) |
|
{ |
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switch (result) { |
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case NCI_HCI_ANY_OK: |
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return 0; |
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case NCI_HCI_ANY_E_REG_PAR_UNKNOWN: |
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return -EOPNOTSUPP; |
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case NCI_HCI_ANY_E_TIMEOUT: |
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return -ETIME; |
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default: |
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return -1; |
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} |
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} |
|
|
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/* HCI core */ |
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static void nci_hci_reset_pipes(struct nci_hci_dev *hdev) |
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{ |
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int i; |
|
|
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for (i = 0; i < NCI_HCI_MAX_PIPES; i++) { |
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hdev->pipes[i].gate = NCI_HCI_INVALID_GATE; |
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hdev->pipes[i].host = NCI_HCI_INVALID_HOST; |
|
} |
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memset(hdev->gate2pipe, NCI_HCI_INVALID_PIPE, sizeof(hdev->gate2pipe)); |
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} |
|
|
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static void nci_hci_reset_pipes_per_host(struct nci_dev *ndev, u8 host) |
|
{ |
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int i; |
|
|
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for (i = 0; i < NCI_HCI_MAX_PIPES; i++) { |
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if (ndev->hci_dev->pipes[i].host == host) { |
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ndev->hci_dev->pipes[i].gate = NCI_HCI_INVALID_GATE; |
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ndev->hci_dev->pipes[i].host = NCI_HCI_INVALID_HOST; |
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} |
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} |
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} |
|
|
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/* 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 |
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* 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. |
|
*/ |
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static int nci_hci_send_data(struct nci_dev *ndev, u8 pipe, |
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const u8 data_type, const u8 *data, |
|
size_t data_len) |
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{ |
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const struct nci_conn_info *conn_info; |
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struct sk_buff *skb; |
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int len, i, r; |
|
u8 cb = pipe; |
|
|
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conn_info = ndev->hci_dev->conn_info; |
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if (!conn_info) |
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return -EPROTO; |
|
|
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i = 0; |
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skb = nci_skb_alloc(ndev, conn_info->max_pkt_payload_len + |
|
NCI_DATA_HDR_SIZE, GFP_KERNEL); |
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if (!skb) |
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return -ENOMEM; |
|
|
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skb_reserve(skb, NCI_DATA_HDR_SIZE + 2); |
|
*(u8 *)skb_push(skb, 1) = data_type; |
|
|
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do { |
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/* If last packet add NCI_HFP_NO_CHAINING */ |
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if (i + conn_info->max_pkt_payload_len - |
|
(skb->len + 1) >= data_len) { |
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cb |= NCI_HFP_NO_CHAINING; |
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len = data_len - i; |
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} else { |
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len = conn_info->max_pkt_payload_len - skb->len - 1; |
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} |
|
|
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*(u8 *)skb_push(skb, 1) = cb; |
|
|
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if (len > 0) |
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skb_put_data(skb, data + i, len); |
|
|
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r = nci_send_data(ndev, conn_info->conn_id, skb); |
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if (r < 0) |
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return r; |
|
|
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i += len; |
|
|
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if (i < data_len) { |
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skb = nci_skb_alloc(ndev, |
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conn_info->max_pkt_payload_len + |
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NCI_DATA_HDR_SIZE, GFP_KERNEL); |
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if (!skb) |
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return -ENOMEM; |
|
|
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skb_reserve(skb, NCI_DATA_HDR_SIZE + 1); |
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} |
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} while (i < data_len); |
|
|
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return i; |
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} |
|
|
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static void nci_hci_send_data_req(struct nci_dev *ndev, const void *opt) |
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{ |
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const struct nci_data *data = opt; |
|
|
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nci_hci_send_data(ndev, data->pipe, data->cmd, |
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data->data, data->data_len); |
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} |
|
|
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int nci_hci_send_event(struct nci_dev *ndev, u8 gate, u8 event, |
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const u8 *param, size_t param_len) |
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{ |
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u8 pipe = ndev->hci_dev->gate2pipe[gate]; |
|
|
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if (pipe == NCI_HCI_INVALID_PIPE) |
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return -EADDRNOTAVAIL; |
|
|
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return nci_hci_send_data(ndev, pipe, |
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NCI_HCP_HEADER(NCI_HCI_HCP_EVENT, event), |
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param, param_len); |
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} |
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EXPORT_SYMBOL(nci_hci_send_event); |
|
|
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int nci_hci_send_cmd(struct nci_dev *ndev, u8 gate, u8 cmd, |
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const u8 *param, size_t param_len, |
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struct sk_buff **skb) |
|
{ |
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const struct nci_hcp_message *message; |
|
const struct nci_conn_info *conn_info; |
|
struct nci_data data; |
|
int r; |
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u8 pipe = ndev->hci_dev->gate2pipe[gate]; |
|
|
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if (pipe == NCI_HCI_INVALID_PIPE) |
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return -EADDRNOTAVAIL; |
|
|
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conn_info = ndev->hci_dev->conn_info; |
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if (!conn_info) |
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return -EPROTO; |
|
|
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data.conn_id = conn_info->conn_id; |
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data.pipe = pipe; |
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data.cmd = NCI_HCP_HEADER(NCI_HCI_HCP_COMMAND, cmd); |
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data.data = param; |
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data.data_len = param_len; |
|
|
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r = nci_request(ndev, nci_hci_send_data_req, &data, |
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msecs_to_jiffies(NCI_DATA_TIMEOUT)); |
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if (r == NCI_STATUS_OK) { |
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message = (struct nci_hcp_message *)conn_info->rx_skb->data; |
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r = nci_hci_result_to_errno( |
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NCI_HCP_MSG_GET_CMD(message->header)); |
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skb_pull(conn_info->rx_skb, NCI_HCI_HCP_MESSAGE_HEADER_LEN); |
|
|
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if (!r && skb) |
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*skb = conn_info->rx_skb; |
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} |
|
|
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return r; |
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} |
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EXPORT_SYMBOL(nci_hci_send_cmd); |
|
|
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int nci_hci_clear_all_pipes(struct nci_dev *ndev) |
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{ |
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int r; |
|
|
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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); |
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return r; |
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} |
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EXPORT_SYMBOL(nci_hci_clear_all_pipes); |
|
|
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static void nci_hci_event_received(struct nci_dev *ndev, u8 pipe, |
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u8 event, struct sk_buff *skb) |
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{ |
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if (ndev->ops->hci_event_received) |
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ndev->ops->hci_event_received(ndev, pipe, event, skb); |
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} |
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|
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static void nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe, |
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u8 cmd, struct sk_buff *skb) |
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{ |
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u8 gate = ndev->hci_dev->pipes[pipe].gate; |
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u8 status = NCI_HCI_ANY_OK | ~NCI_HCI_FRAGMENT; |
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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; |
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struct nci_hci_all_pipe_cleared_noti *cleared_info; |
|
|
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pr_debug("from gate %x pipe %x cmd %x\n", gate, pipe, cmd); |
|
|
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switch (cmd) { |
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case NCI_HCI_ADM_NOTIFY_PIPE_CREATED: |
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if (skb->len != 5) { |
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status = NCI_HCI_ANY_E_NOK; |
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goto exit; |
|
} |
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create_info = (struct nci_hci_create_pipe_resp *)skb->data; |
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dest_gate = create_info->dest_gate; |
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new_pipe = create_info->pipe; |
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if (new_pipe >= NCI_HCI_MAX_PIPES) { |
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status = NCI_HCI_ANY_E_NOK; |
|
goto exit; |
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} |
|
|
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/* Save the new created pipe and bind with local gate, |
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* the description for skb->data[3] is destination gate id |
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* but since we received this cmd from host controller, we |
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* are the destination and it is our local gate |
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*/ |
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ndev->hci_dev->gate2pipe[dest_gate] = new_pipe; |
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ndev->hci_dev->pipes[new_pipe].gate = dest_gate; |
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ndev->hci_dev->pipes[new_pipe].host = |
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create_info->src_host; |
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break; |
|
case NCI_HCI_ANY_OPEN_PIPE: |
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/* If the pipe is not created report an error */ |
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if (gate == NCI_HCI_INVALID_GATE) { |
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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; |
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ndev->hci_dev->pipes[delete_info->pipe].host = |
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NCI_HCI_INVALID_HOST; |
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break; |
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case NCI_HCI_ADM_NOTIFY_ALL_PIPE_CLEARED: |
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if (skb->len != 1) { |
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status = NCI_HCI_ANY_E_NOK; |
|
goto exit; |
|
} |
|
|
|
cleared_info = |
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(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) |
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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, |
|
struct sk_buff *skb) |
|
{ |
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struct nci_conn_info *conn_info; |
|
|
|
conn_info = ndev->hci_dev->conn_info; |
|
if (!conn_info) |
|
goto exit; |
|
|
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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, 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; |
|
const 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; |
|
const 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, &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; |
|
const 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) |
|
{ |
|
const struct nci_hcp_message *message; |
|
const 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, &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) |
|
{ |
|
const struct nci_hcp_message *message; |
|
const 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, &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, |
|
const 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); |
|
}
|
|
|