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 14 int 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(sizeof(*hdr) + sizeof(*ev), GFP_KERNEL); 21 if (!skb) 22 return -ENOMEM; 23 24 hdr = skb_put(skb, 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, 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 } 36 EXPORT_SYMBOL(hci_drv_cmd_status); 37 38 int 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(sizeof(*hdr) + sizeof(*ev) + rp_len, GFP_KERNEL); 46 if (!skb) 47 return -ENOMEM; 48 49 hdr = skb_put(skb, 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, sizeof(*ev)); 54 ev->opcode = __cpu_to_le16(cmd); 55 ev->status = status; 56 57 skb_put_data(skb, rp, rp_len); 58 59 hci_skb_pkt_type(skb) = HCI_DRV_PKT; 60 61 return hci_recv_frame(hdev, skb); 62 } 63 EXPORT_SYMBOL(hci_drv_cmd_complete); 64 65 int 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, 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 } 105 EXPORT_SYMBOL(hci_drv_process_cmd); 106