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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2025 Google Corporation
*/
#include <linux/skbuff.h>
#include <linux/types.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci.h>
#include <net/bluetooth/hci_core.h>
#include <net/bluetooth/hci_drv.h>
int hci_drv_cmd_status(struct hci_dev *hdev, u16 cmd, u8 status)
{
struct hci_drv_ev_hdr *hdr;
struct hci_drv_ev_cmd_status *ev;
struct sk_buff *skb;
skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*ev), GFP_KERNEL);
if (!skb)
return -ENOMEM;
hdr = skb_put(skb, sizeof(*hdr));
hdr->opcode = __cpu_to_le16(HCI_DRV_EV_CMD_STATUS);
hdr->len = __cpu_to_le16(sizeof(*ev));
ev = skb_put(skb, sizeof(*ev));
ev->opcode = __cpu_to_le16(cmd);
ev->status = status;
hci_skb_pkt_type(skb) = HCI_DRV_PKT;
return hci_recv_frame(hdev, skb);
}
EXPORT_SYMBOL(hci_drv_cmd_status);
int hci_drv_cmd_complete(struct hci_dev *hdev, u16 cmd, u8 status, void *rp,
size_t rp_len)
{
struct hci_drv_ev_hdr *hdr;
struct hci_drv_ev_cmd_complete *ev;
struct sk_buff *skb;
skb = bt_skb_alloc(sizeof(*hdr) + sizeof(*ev) + rp_len, GFP_KERNEL);
if (!skb)
return -ENOMEM;
hdr = skb_put(skb, sizeof(*hdr));
hdr->opcode = __cpu_to_le16(HCI_DRV_EV_CMD_COMPLETE);
hdr->len = __cpu_to_le16(sizeof(*ev) + rp_len);
ev = skb_put(skb, sizeof(*ev));
ev->opcode = __cpu_to_le16(cmd);
ev->status = status;
skb_put_data(skb, rp, rp_len);
hci_skb_pkt_type(skb) = HCI_DRV_PKT;
return hci_recv_frame(hdev, skb);
}
EXPORT_SYMBOL(hci_drv_cmd_complete);
int hci_drv_process_cmd(struct hci_dev *hdev, struct sk_buff *skb)
{
struct hci_drv_cmd_hdr *hdr;
const struct hci_drv_handler *handler = NULL;
u16 opcode, len, ogf, ocf;
hdr = skb_pull_data(skb, sizeof(*hdr));
if (!hdr)
return -EILSEQ;
opcode = __le16_to_cpu(hdr->opcode);
len = __le16_to_cpu(hdr->len);
if (len != skb->len)
return -EILSEQ;
ogf = hci_opcode_ogf(opcode);
ocf = hci_opcode_ocf(opcode);
if (!hdev->hci_drv)
return hci_drv_cmd_status(hdev, opcode,
HCI_DRV_STATUS_UNKNOWN_COMMAND);
if (ogf != HCI_DRV_OGF_DRIVER_SPECIFIC) {
if (opcode < hdev->hci_drv->common_handler_count)
handler = &hdev->hci_drv->common_handlers[opcode];
} else {
if (ocf < hdev->hci_drv->specific_handler_count)
handler = &hdev->hci_drv->specific_handlers[ocf];
}
if (!handler || !handler->func)
return hci_drv_cmd_status(hdev, opcode,
HCI_DRV_STATUS_UNKNOWN_COMMAND);
if (len != handler->data_len)
return hci_drv_cmd_status(hdev, opcode,
HCI_DRV_STATUS_INVALID_PARAMETERS);
return handler->func(hdev, skb->data, len);
}
EXPORT_SYMBOL(hci_drv_process_cmd);
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