1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2025 Google Corporation
4 */
5
6#include <linux/skbuff.h>
7#include <linux/types.h>
8
9#include <net/bluetooth/bluetooth.h>
10#include <net/bluetooth/hci.h>
11#include <net/bluetooth/hci_core.h>
12#include <net/bluetooth/hci_drv.h>
13
14int hci_drv_cmd_status(struct hci_dev *hdev, u16 cmd, u8 status)
15{
16 struct hci_drv_ev_hdr *hdr;
17 struct hci_drv_ev_cmd_status *ev;
18 struct sk_buff *skb;
19
20 skb = bt_skb_alloc(len: sizeof(*hdr) + sizeof(*ev), GFP_KERNEL);
21 if (!skb)
22 return -ENOMEM;
23
24 hdr = skb_put(skb, len: sizeof(*hdr));
25 hdr->opcode = __cpu_to_le16(HCI_DRV_EV_CMD_STATUS);
26 hdr->len = __cpu_to_le16(sizeof(*ev));
27
28 ev = skb_put(skb, len: sizeof(*ev));
29 ev->opcode = __cpu_to_le16(cmd);
30 ev->status = status;
31
32 hci_skb_pkt_type(skb) = HCI_DRV_PKT;
33
34 return hci_recv_frame(hdev, skb);
35}
36EXPORT_SYMBOL(hci_drv_cmd_status);
37
38int hci_drv_cmd_complete(struct hci_dev *hdev, u16 cmd, u8 status, void *rp,
39 size_t rp_len)
40{
41 struct hci_drv_ev_hdr *hdr;
42 struct hci_drv_ev_cmd_complete *ev;
43 struct sk_buff *skb;
44
45 skb = bt_skb_alloc(len: sizeof(*hdr) + sizeof(*ev) + rp_len, GFP_KERNEL);
46 if (!skb)
47 return -ENOMEM;
48
49 hdr = skb_put(skb, len: sizeof(*hdr));
50 hdr->opcode = __cpu_to_le16(HCI_DRV_EV_CMD_COMPLETE);
51 hdr->len = __cpu_to_le16(sizeof(*ev) + rp_len);
52
53 ev = skb_put(skb, len: sizeof(*ev));
54 ev->opcode = __cpu_to_le16(cmd);
55 ev->status = status;
56
57 skb_put_data(skb, data: rp, len: rp_len);
58
59 hci_skb_pkt_type(skb) = HCI_DRV_PKT;
60
61 return hci_recv_frame(hdev, skb);
62}
63EXPORT_SYMBOL(hci_drv_cmd_complete);
64
65int hci_drv_process_cmd(struct hci_dev *hdev, struct sk_buff *skb)
66{
67 struct hci_drv_cmd_hdr *hdr;
68 const struct hci_drv_handler *handler = NULL;
69 u16 opcode, len, ogf, ocf;
70
71 hdr = skb_pull_data(skb, len: sizeof(*hdr));
72 if (!hdr)
73 return -EILSEQ;
74
75 opcode = __le16_to_cpu(hdr->opcode);
76 len = __le16_to_cpu(hdr->len);
77 if (len != skb->len)
78 return -EILSEQ;
79
80 ogf = hci_opcode_ogf(opcode);
81 ocf = hci_opcode_ocf(opcode);
82
83 if (!hdev->hci_drv)
84 return hci_drv_cmd_status(hdev, opcode,
85 HCI_DRV_STATUS_UNKNOWN_COMMAND);
86
87 if (ogf != HCI_DRV_OGF_DRIVER_SPECIFIC) {
88 if (opcode < hdev->hci_drv->common_handler_count)
89 handler = &hdev->hci_drv->common_handlers[opcode];
90 } else {
91 if (ocf < hdev->hci_drv->specific_handler_count)
92 handler = &hdev->hci_drv->specific_handlers[ocf];
93 }
94
95 if (!handler || !handler->func)
96 return hci_drv_cmd_status(hdev, opcode,
97 HCI_DRV_STATUS_UNKNOWN_COMMAND);
98
99 if (len != handler->data_len)
100 return hci_drv_cmd_status(hdev, opcode,
101 HCI_DRV_STATUS_INVALID_PARAMETERS);
102
103 return handler->func(hdev, skb->data, len);
104}
105EXPORT_SYMBOL(hci_drv_process_cmd);
106

source code of linux/net/bluetooth/hci_drv.c