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Bluetooth: Handle BR/EDR devices during suspend

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To handle BR/EDR devices, we first disable page scan and disconnect all
connected devices. Once that is complete, we add event filters (for
devices that can wake the system) and re-enable page scan.

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Abhishek Pandit-Subedi 2020-03-11 08:54:01 -07:00 • committed by Marcel Holtmann
parent 9952d90ea2
commit 4f40afc6c7
5 changed files with 169 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

17
include/net/bluetooth/hci.h
View file

@ -942,10 +942,14 @@ struct hci_cp_sniff_subrate {
#define HCI_OP_RESET 0x0c03
#define HCI_OP_SET_EVENT_FLT 0x0c05
struct hci_cp_set_event_flt {
__u8 flt_type;
__u8 cond_type;
__u8 condition[];
#define HCI_SET_EVENT_FLT_SIZE 9
struct hci_cp_set_event_filter {
__u8 flt_type;
__u8 cond_type;
struct {
bdaddr_t bdaddr;
__u8 auto_accept;
} __packed addr_conn_flt;
} __packed;
/* Filter types */
@ -959,8 +963,9 @@ struct hci_cp_set_event_flt {
#define HCI_CONN_SETUP_ALLOW_BDADDR 0x02
/* CONN_SETUP Conditions */
#define HCI_CONN_SETUP_AUTO_OFF 0x01
#define HCI_CONN_SETUP_AUTO_ON 0x02
#define HCI_CONN_SETUP_AUTO_OFF 0x01
#define HCI_CONN_SETUP_AUTO_ON 0x02
#define HCI_CONN_SETUP_AUTO_ON_WITH_RS 0x03
#define HCI_OP_READ_STORED_LINK_KEY 0x0c0d
struct hci_cp_read_stored_link_key {

10
include/net/bluetooth/hci_core.h
View file

@ -91,6 +91,10 @@ struct discovery_state {
#define SUSPEND_NOTIFIER_TIMEOUT msecs_to_jiffies(2000) /* 2 seconds */
enum suspend_tasks {
SUSPEND_SCAN_DISABLE,
SUSPEND_SCAN_ENABLE,
SUSPEND_DISCONNECTING,
SUSPEND_POWERING_DOWN,
SUSPEND_PREPARE_NOTIFIER,
@ -99,7 +103,8 @@ enum suspend_tasks {
enum suspended_state {
BT_RUNNING = 0,
BT_SUSPENDED,
BT_SUSPEND_DISCONNECT,
BT_SUSPEND_COMPLETE,
};
struct hci_conn_hash {
@ -409,6 +414,8 @@ struct hci_dev {
struct work_struct suspend_prepare;
enum suspended_state suspend_state_next;
enum suspended_state suspend_state;
bool scanning_paused;
bool suspended;
wait_queue_head_t suspend_wait_q;
DECLARE_BITMAP(suspend_tasks, __SUSPEND_NUM_TASKS);
@ -418,6 +425,7 @@ struct hci_dev {
struct list_head mgmt_pending;
struct list_head blacklist;
struct list_head whitelist;
struct list_head wakeable;
struct list_head uuids;
struct list_head link_keys;
struct list_head long_term_keys;