Hi Miao-chen, > This adds a new header to facilitate the opcode and packet structures of > vendor extension(s). For now, we add only the > HCI_VS_MSFT_Read_Supported_Features command from Microsoft vendor > extension. See https://docs.microsoft.com/en-us/windows-hardware/drivers/ > bluetooth/microsoft-defined-bluetooth-hci-commands-and-events# > microsoft-defined-bluetooth-hci-events for more details. > Upon initialization of a hci_dev, we issue a > HCI_VS_MSFT_Read_Supported_Features command to read the supported features > of Microsoft vendor extension if the opcode of Microsoft vendor extension > is valid. See https://docs.microsoft.com/en-us/windows-hardware/drivers/ > bluetooth/microsoft-defined-bluetooth-hci-commands-and-events# > hci_vs_msft_read_supported_features for more details. > This was verified on a device with Intel ThhunderPeak BT controller where > the Microsoft vendor extension features are 0x000000000000003f. > > Signed-off-by: Miao-chen Chou <mcchou@xxxxxxxxxxxx> > --- > > Changes in v1: > - Add vendor_hci.h to facilitate opcodes and packet structures of vendor > extension(s). Put the structs directly into hci_msft.c and try to isolate all commands into that file. And prefix everything with msft_. > - Add opcode for the HCI_VS_MSFT_Read_Supported_Features command from > Microsoft vendor extension. > - Issue a HCI_VS_MSFT_Read_Supported_Features command upon > hci_dev_do_open and save the return values. > > include/net/bluetooth/hci_core.h | 1 + > include/net/bluetooth/vendor_hci.h | 51 ++++++++++++++++++++++++++++++ > net/bluetooth/hci_core.c | 30 ++++++++++++++++++ > net/bluetooth/hci_event.c | 49 +++++++++++++++++++++++++++- > 4 files changed, 130 insertions(+), 1 deletion(-) > create mode 100644 include/net/bluetooth/vendor_hci.h > > diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h > index 15daf3b2d4f0..941e71bdad42 100644 > --- a/include/net/bluetooth/hci_core.h > +++ b/include/net/bluetooth/hci_core.h > @@ -30,6 +30,7 @@ > > #include <net/bluetooth/hci.h> > #include <net/bluetooth/hci_sock.h> > +#include <net/bluetooth/vendor_hci.h> > > /* HCI priority */ > #define HCI_PRIO_MAX 7 > diff --git a/include/net/bluetooth/vendor_hci.h b/include/net/bluetooth/vendor_hci.h > new file mode 100644 > index 000000000000..bd374a7bf976 > --- /dev/null > +++ b/include/net/bluetooth/vendor_hci.h > @@ -0,0 +1,51 @@ > +/* SPDX-License-Identifier: GPL-2.0-or-later */ > +/* > + * BlueZ - Bluetooth protocol stack for Linux > + * Copyright (C) 2020 Google Corporation > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License version 2 as > + * published by the Free Software Foundation; > + * > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS > + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. > + * IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY > + * CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES > + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN > + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF > + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. > + * > + * ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, > + * COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS > + * SOFTWARE IS DISCLAIMED. > + */ > + > +#ifndef __VENDOR_HCI_H > +#define __VENDOR_HCI_H > + > +#define MSFT_EVT_PREFIX_MAX_LEN 255 > + > +struct msft_cmd_cmp_info { > + __u8 status; > + __u8 sub_opcode; > +} __packed; > + > +/* Microsoft Vendor HCI subcommands */ > +#define MSFT_OP_READ_SUPPORTED_FEATURES 0x00 > +#define MSFT_FEATURE_MASK_RSSI_MONITOR_BREDR_CONN 0x0000000000000001 > +#define MSFT_FEATURE_MASK_RSSI_MONITOR_LE_CONN 0x0000000000000002 > +#define MSFT_FEATURE_MASK_RSSI_MONITOR_LE_ADV 0x0000000000000004 > +#define MSFT_FEATURE_MASK_ADV_MONITOR_LE_ADV 0x0000000000000008 > +#define MSFT_FEATURE_MASK_VERIFY_CURVE_ 0x0000000000000010 > +#define MSFT_FEATURE_MASK_CONCURRENT_ADV_MONITOR 0x0000000000000020 > +struct msft_cp_read_supported_features { > + __u8 sub_opcode; > +} __packed; > +struct msft_rp_read_supported_features { > + __u64 features; > + __u8 msft_evt_prefix_len; > + __u8 msft_evt_prefix[0]; > +} __packed; > + > +#endif /* __VENDOR_HCI_H */ > diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c > index dbd2ad3a26ed..3cec58ca0047 100644 > --- a/net/bluetooth/hci_core.c > +++ b/net/bluetooth/hci_core.c > @@ -1407,6 +1407,32 @@ static void hci_dev_get_bd_addr_from_property(struct hci_dev *hdev) > bacpy(&hdev->public_addr, &ba); > } > > +static int hci_msft_read_supported_features_req(struct hci_request *req, > + unsigned long opt) > +{ > + struct hci_dev *hdev = req->hdev; > + struct msft_cp_read_supported_features cp; > + > + if (hdev->msft_vnd_ext_opcode == HCI_OP_NOP) > + return -EOPNOTSUPP; > + > + cp.sub_opcode = MSFT_OP_READ_SUPPORTED_FEATURES; > + hci_req_add(req, hdev->msft_vnd_ext_opcode, sizeof(cp), &cp); > + return 0; > +} > + > +static void read_vendor_extension_features(struct hci_dev *hdev) > +{ > + int err; > + > + if (hdev->msft_vnd_ext_opcode != HCI_OP_NOP) { > + err = __hci_req_sync(hdev, hci_msft_read_supported_features_req, > + 0, HCI_CMD_TIMEOUT, NULL); > + if (err) > + BT_ERR("HCI_VS_MSFT_Read_Supported_Feature failed"); > + } > +} > + > static int hci_dev_do_open(struct hci_dev *hdev) > { > int ret = 0; > @@ -1572,6 +1598,10 @@ static int hci_dev_do_open(struct hci_dev *hdev) > set_bit(HCI_UP, &hdev->flags); > hci_sock_dev_event(hdev, HCI_DEV_UP); > hci_leds_update_powered(hdev, true); > + > + /* Check features supported by HCI extensions. */ > + read_vendor_extension_features(hdev); > + Lets not do this after the HCI_DEV_UP event. You need to do this after the init sequence has executed. > if (!hci_dev_test_flag(hdev, HCI_SETUP) && > !hci_dev_test_flag(hdev, HCI_CONFIG) && > !hci_dev_test_flag(hdev, HCI_UNCONFIGURED) && > diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c > index 20408d386268..6a156167dfc9 100644 > --- a/net/bluetooth/hci_event.c > +++ b/net/bluetooth/hci_event.c > @@ -23,7 +23,6 @@ > */ > > /* Bluetooth HCI event handling. */ > - This change doesn’t belong here. > #include <asm/unaligned.h> > > #include <net/bluetooth/bluetooth.h> > @@ -1787,6 +1786,47 @@ static void hci_cc_write_ssp_debug_mode(struct hci_dev *hdev, struct sk_buff *sk > hdev->ssp_debug_mode = *mode; > } > > +static void hci_cc_msft_vnd_ext(struct hci_dev *hdev, struct sk_buff *skb) > +{ > + struct msft_cmd_cmp_info *info = (void *)skb->data; > + const u8 status = info->status; > + const u16 sub_opcode = __le16_to_cpu(info->sub_opcode); > + > + skb_pull(skb, sizeof(*info)); > + > + if (status) { > + BT_ERR("Microsoft vendor extension sub command 0x%2.2x failed", > + sub_opcode); > + return; > + } > + > + BT_DBG("%s status 0x%2.2x sub opcode 0x%2.2x", hdev->name, status, > + sub_opcode); > + > + switch (sub_opcode) { > + case MSFT_OP_READ_SUPPORTED_FEATURES: { > + struct msft_rp_read_supported_features *rp = (void *)skb->data; > + > + hdev->msft_vnd_ext_features = __le64_to_cpu(rp->features); > + hdev->msft_vnd_ext_evt_prefix_len = rp->msft_evt_prefix_len; > + hdev->msft_vnd_ext_evt_prefix = > + kmalloc(hdev->msft_vnd_ext_evt_prefix_len, GFP_ATOMIC); > + if (!hdev->msft_vnd_ext_evt_prefix) > + return; > + > + memcpy(hdev->msft_vnd_ext_evt_prefix, rp->msft_evt_prefix, > + hdev->msft_vnd_ext_evt_prefix_len); > + BT_DBG("%s Microsoft vendor extension features 0x%016llx", > + hdev->name, hdev->msft_vnd_ext_features); > + break; > + } > + default: > + BT_ERR("%s unknown sub opcode 0x%2.2x", hdev->name, > + sub_opcode); > + break; > + } > +} > + > static void hci_cs_inquiry(struct hci_dev *hdev, __u8 status) > { > BT_DBG("%s status 0x%2.2x", hdev->name, status); > @@ -3198,6 +3238,7 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb, > hci_req_complete_skb_t *req_complete_skb) > { > struct hci_ev_cmd_complete *ev = (void *) skb->data; > + const u16 msft_vnd_ext_opcode = hdev->msft_vnd_ext_opcode; > > *opcode = __le16_to_cpu(ev->opcode); > *status = skb->data[sizeof(*ev)]; > @@ -3538,6 +3579,12 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb, > break; > > default: > + /* Check if it's a Microsoft vendor extension opcode. */ > + if (msft_vnd_ext_opcode != HCI_OP_NOP && > + *opcode == msft_vnd_ext_opcode) { > + hci_cc_msft_vnd_ext(hdev, skb); > + break; > + } > BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode); > break; > } For now we only have synchronous commands. The features reading can be done with sync call. Regards Marcel
