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-rw-r--r--net/bluetooth/Kconfig7
-rw-r--r--net/bluetooth/Makefile1
-rw-r--r--net/bluetooth/hci_core.c5
-rw-r--r--net/bluetooth/hci_event.c5
-rw-r--r--net/bluetooth/msft.c141
-rw-r--r--net/bluetooth/msft.h18
6 files changed, 177 insertions, 0 deletions
diff --git a/net/bluetooth/Kconfig b/net/bluetooth/Kconfig
index 77703216a2e3..9e25c6570170 100644
--- a/net/bluetooth/Kconfig
+++ b/net/bluetooth/Kconfig
@@ -93,6 +93,13 @@ config BT_LEDS
This option selects a few LED triggers for different
Bluetooth events.
+config BT_MSFTEXT
+ bool "Enable Microsoft extensions"
+ depends on BT
+ help
+ This options enables support for the Microsoft defined HCI
+ vendor extensions.
+
config BT_DEBUGFS
bool "Export Bluetooth internals in debugfs"
depends on BT && DEBUG_FS
diff --git a/net/bluetooth/Makefile b/net/bluetooth/Makefile
index fda41c0b4781..41dd541a44a5 100644
--- a/net/bluetooth/Makefile
+++ b/net/bluetooth/Makefile
@@ -19,5 +19,6 @@ bluetooth-y := af_bluetooth.o hci_core.o hci_conn.o hci_event.o mgmt.o \
bluetooth-$(CONFIG_BT_BREDR) += sco.o
bluetooth-$(CONFIG_BT_HS) += a2mp.o amp.o
bluetooth-$(CONFIG_BT_LEDS) += leds.o
+bluetooth-$(CONFIG_BT_MSFTEXT) += msft.o
bluetooth-$(CONFIG_BT_DEBUGFS) += hci_debugfs.o
bluetooth-$(CONFIG_BT_SELFTEST) += selftest.o
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 5fb9db0b2b7b..ef0ee3a3d9ed 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -44,6 +44,7 @@
#include "hci_debugfs.h"
#include "smp.h"
#include "leds.h"
+#include "msft.h"
static void hci_rx_work(struct work_struct *work);
static void hci_cmd_work(struct work_struct *work);
@@ -1563,6 +1564,8 @@ setup_failed:
hci_dev_test_flag(hdev, HCI_VENDOR_DIAG) && hdev->set_diag)
ret = hdev->set_diag(hdev, true);
+ msft_do_open(hdev);
+
clear_bit(HCI_INIT, &hdev->flags);
if (!ret) {
@@ -1758,6 +1761,8 @@ int hci_dev_do_close(struct hci_dev *hdev)
hci_sock_dev_event(hdev, HCI_DEV_DOWN);
+ msft_do_close(hdev);
+
if (hdev->flush)
hdev->flush(hdev);
diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index af396cb69602..2803beaa1c44 100644
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -35,6 +35,7 @@
#include "a2mp.h"
#include "amp.h"
#include "smp.h"
+#include "msft.h"
#define ZERO_KEY "\x00\x00\x00\x00\x00\x00\x00\x00" \
"\x00\x00\x00\x00\x00\x00\x00\x00"
@@ -6166,6 +6167,10 @@ void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
hci_num_comp_blocks_evt(hdev, skb);
break;
+ case HCI_EV_VENDOR:
+ msft_vendor_evt(hdev, skb);
+ break;
+
default:
BT_DBG("%s event 0x%2.2x", hdev->name, event);
break;
diff --git a/net/bluetooth/msft.c b/net/bluetooth/msft.c
new file mode 100644
index 000000000000..d6c4e6b5ae77
--- /dev/null
+++ b/net/bluetooth/msft.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 Google Corporation
+ */
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/hci_core.h>
+
+#include "msft.h"
+
+#define MSFT_OP_READ_SUPPORTED_FEATURES 0x00
+struct msft_cp_read_supported_features {
+ __u8 sub_opcode;
+} __packed;
+struct msft_rp_read_supported_features {
+ __u8 status;
+ __u8 sub_opcode;
+ __le64 features;
+ __u8 evt_prefix_len;
+ __u8 evt_prefix[0];
+} __packed;
+
+struct msft_data {
+ __u64 features;
+ __u8 evt_prefix_len;
+ __u8 *evt_prefix;
+};
+
+static bool read_supported_features(struct hci_dev *hdev,
+ struct msft_data *msft)
+{
+ struct msft_cp_read_supported_features cp;
+ struct msft_rp_read_supported_features *rp;
+ struct sk_buff *skb;
+
+ cp.sub_opcode = MSFT_OP_READ_SUPPORTED_FEATURES;
+
+ skb = __hci_cmd_sync(hdev, hdev->msft_opcode, sizeof(cp), &cp,
+ HCI_CMD_TIMEOUT);
+ if (IS_ERR(skb)) {
+ bt_dev_err(hdev, "Failed to read MSFT supported features (%ld)",
+ PTR_ERR(skb));
+ return false;
+ }
+
+ if (skb->len < sizeof(*rp)) {
+ bt_dev_err(hdev, "MSFT supported features length mismatch");
+ goto failed;
+ }
+
+ rp = (struct msft_rp_read_supported_features *)skb->data;
+
+ if (rp->sub_opcode != MSFT_OP_READ_SUPPORTED_FEATURES)
+ goto failed;
+
+ if (rp->evt_prefix_len > 0) {
+ msft->evt_prefix = kmemdup(rp->evt_prefix, rp->evt_prefix_len,
+ GFP_KERNEL);
+ if (!msft->evt_prefix)
+ goto failed;
+ }
+
+ msft->evt_prefix_len = rp->evt_prefix_len;
+ msft->features = __le64_to_cpu(rp->features);
+
+ kfree_skb(skb);
+ return true;
+
+failed:
+ kfree_skb(skb);
+ return false;
+}
+
+void msft_do_open(struct hci_dev *hdev)
+{
+ struct msft_data *msft;
+
+ if (hdev->msft_opcode == HCI_OP_NOP)
+ return;
+
+ bt_dev_dbg(hdev, "Initialize MSFT extension");
+
+ msft = kzalloc(sizeof(*msft), GFP_KERNEL);
+ if (!msft)
+ return;
+
+ if (!read_supported_features(hdev, msft)) {
+ kfree(msft);
+ return;
+ }
+
+ hdev->msft_data = msft;
+}
+
+void msft_do_close(struct hci_dev *hdev)
+{
+ struct msft_data *msft = hdev->msft_data;
+
+ if (!msft)
+ return;
+
+ bt_dev_dbg(hdev, "Cleanup of MSFT extension");
+
+ hdev->msft_data = NULL;
+
+ kfree(msft->evt_prefix);
+ kfree(msft);
+}
+
+void msft_vendor_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+ struct msft_data *msft = hdev->msft_data;
+ u8 event;
+
+ if (!msft)
+ return;
+
+ /* When the extension has defined an event prefix, check that it
+ * matches, and otherwise just return.
+ */
+ if (msft->evt_prefix_len > 0) {
+ if (skb->len < msft->evt_prefix_len)
+ return;
+
+ if (memcmp(skb->data, msft->evt_prefix, msft->evt_prefix_len))
+ return;
+
+ skb_pull(skb, msft->evt_prefix_len);
+ }
+
+ /* Every event starts at least with an event code and the rest of
+ * the data is variable and depends on the event code.
+ */
+ if (skb->len < 1)
+ return;
+
+ event = *skb->data;
+ skb_pull(skb, 1);
+
+ bt_dev_dbg(hdev, "MSFT vendor event %u", event);
+}
diff --git a/net/bluetooth/msft.h b/net/bluetooth/msft.h
new file mode 100644
index 000000000000..5aa9130e1f8a
--- /dev/null
+++ b/net/bluetooth/msft.h
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 Google Corporation
+ */
+
+#if IS_ENABLED(CONFIG_BT_MSFTEXT)
+
+void msft_do_open(struct hci_dev *hdev);
+void msft_do_close(struct hci_dev *hdev);
+void msft_vendor_evt(struct hci_dev *hdev, struct sk_buff *skb);
+
+#else
+
+static inline void msft_do_open(struct hci_dev *hdev) {}
+static inline void msft_do_close(struct hci_dev *hdev) {}
+static inline void msft_vendor_evt(struct hci_dev *hdev, struct sk_buff *skb) {}
+
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-21 14:20:07 +0000