diff options
| -rw-r--r-- | drivers/bluetooth/btusb.c | 129 |
1 files changed, 124 insertions, 5 deletions
diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index 974b36a02375..fda5622b1d6e 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -16,6 +16,7 @@ #include <linux/of_irq.h> #include <linux/suspend.h> #include <linux/gpio/consumer.h> +#include <linux/debugfs.h> #include <asm/unaligned.h> #include <net/bluetooth/bluetooth.h> @@ -31,7 +32,6 @@ static bool disable_scofix; static bool force_scofix; static bool enable_autosuspend = IS_ENABLED(CONFIG_BT_HCIBTUSB_AUTOSUSPEND); - static bool reset = true; static struct usb_driver btusb_driver; @@ -561,8 +561,13 @@ struct btusb_data { unsigned long flags; - struct work_struct work; - struct work_struct waker; + bool poll_sync; + int intr_interval; + struct work_struct work; + struct work_struct waker; + struct delayed_work rx_work; + + struct sk_buff_head acl_q; struct usb_anchor deferred; struct usb_anchor tx_anchor; @@ -727,6 +732,16 @@ static inline void btusb_free_frags(struct btusb_data *data) spin_unlock_irqrestore(&data->rxlock, flags); } +static int btusb_recv_event(struct btusb_data *data, struct sk_buff *skb) +{ + if (data->intr_interval) { + /* Trigger dequeue immediatelly if an event is received */ + schedule_delayed_work(&data->rx_work, 0); + } + + return data->recv_event(data->hdev, skb); +} + static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count) { struct sk_buff *skb; @@ -772,7 +787,7 @@ static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count) if (!hci_skb_expect(skb)) { /* Complete frame */ - data->recv_event(data->hdev, skb); + btusb_recv_event(data, skb); skb = NULL; } } @@ -783,6 +798,20 @@ static int btusb_recv_intr(struct btusb_data *data, void *buffer, int count) return err; } +static int btusb_recv_acl(struct btusb_data *data, struct sk_buff *skb) +{ + /* Only queue ACL packet if intr_interval is set as it means + * force_poll_sync has been enabled. + */ + if (!data->intr_interval) + return data->recv_acl(data->hdev, skb); + + skb_queue_tail(&data->acl_q, skb); + schedule_delayed_work(&data->rx_work, data->intr_interval); + + return 0; +} + static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count) { struct sk_buff *skb; @@ -830,7 +859,7 @@ static int btusb_recv_bulk(struct btusb_data *data, void *buffer, int count) if (!hci_skb_expect(skb)) { /* Complete frame */ - data->recv_acl(data->hdev, skb); + btusb_recv_acl(data, skb); skb = NULL; } } @@ -986,6 +1015,28 @@ static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags) usb_unanchor_urb(urb); } + /* Only initialize intr_interval if URB poll sync is enabled */ + if (!data->poll_sync) + goto done; + + /* The units are frames (milliseconds) for full and low speed devices, + * and microframes (1/8 millisecond) for highspeed and SuperSpeed + * devices. + * + * This is done once on open/resume so it shouldn't change even if + * force_poll_sync changes. + */ + switch (urb->dev->speed) { + case USB_SPEED_SUPER_PLUS: + case USB_SPEED_SUPER: /* units are 125us */ + data->intr_interval = usecs_to_jiffies(urb->interval * 125); + break; + default: + data->intr_interval = msecs_to_jiffies(urb->interval); + break; + } + +done: usb_free_urb(urb); return err; @@ -1448,9 +1499,12 @@ static int btusb_close(struct hci_dev *hdev) BT_DBG("%s", hdev->name); + cancel_delayed_work(&data->rx_work); cancel_work_sync(&data->work); cancel_work_sync(&data->waker); + skb_queue_purge(&data->acl_q); + clear_bit(BTUSB_ISOC_RUNNING, &data->flags); clear_bit(BTUSB_BULK_RUNNING, &data->flags); clear_bit(BTUSB_INTR_RUNNING, &data->flags); @@ -1482,6 +1536,10 @@ static int btusb_flush(struct hci_dev *hdev) BT_DBG("%s", hdev->name); + cancel_delayed_work(&data->rx_work); + + skb_queue_purge(&data->acl_q); + usb_kill_anchored_urbs(&data->tx_anchor); btusb_free_frags(data); @@ -1845,6 +1903,17 @@ static void btusb_waker(struct work_struct *work) usb_autopm_put_interface(data->intf); } +static void btusb_rx_work(struct work_struct *work) +{ + struct btusb_data *data = container_of(work, struct btusb_data, + rx_work.work); + struct sk_buff *skb; + + /* Dequeue ACL data received during the interval */ + while ((skb = skb_dequeue(&data->acl_q))) + data->recv_acl(data->hdev, skb); +} + static int btusb_setup_bcm92035(struct hci_dev *hdev) { struct sk_buff *skb; @@ -3402,6 +3471,49 @@ static int btusb_shutdown_qca(struct hci_dev *hdev) return 0; } +static ssize_t force_poll_sync_read(struct file *file, char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct btusb_data *data = file->private_data; + char buf[3]; + + buf[0] = data->poll_sync ? 'Y' : 'N'; + buf[1] = '\n'; + buf[2] = '\0'; + return simple_read_from_buffer(user_buf, count, ppos, buf, 2); +} + +static ssize_t force_poll_sync_write(struct file *file, + const char __user *user_buf, + size_t count, loff_t *ppos) +{ + struct btusb_data *data = file->private_data; + bool enable; + int err; + + err = kstrtobool_from_user(user_buf, count, &enable); + if (err) + return err; + + /* Only allow changes while the adapter is down */ + if (test_bit(HCI_UP, &data->hdev->flags)) + return -EPERM; + + if (data->poll_sync == enable) + return -EALREADY; + + data->poll_sync = enable; + + return count; +} + +static const struct file_operations force_poll_sync_fops = { + .open = simple_open, + .read = force_poll_sync_read, + .write = force_poll_sync_write, + .llseek = default_llseek, +}; + static int btusb_probe(struct usb_interface *intf, const struct usb_device_id *id) { @@ -3485,6 +3597,10 @@ static int btusb_probe(struct usb_interface *intf, INIT_WORK(&data->work, btusb_work); INIT_WORK(&data->waker, btusb_waker); + INIT_DELAYED_WORK(&data->rx_work, btusb_rx_work); + + skb_queue_head_init(&data->acl_q); + init_usb_anchor(&data->deferred); init_usb_anchor(&data->tx_anchor); spin_lock_init(&data->txlock); @@ -3750,6 +3866,9 @@ static int btusb_probe(struct usb_interface *intf, usb_set_intfdata(intf, data); + debugfs_create_file("force_poll_sync", 0644, hdev->debugfs, data, + &force_poll_sync_fops); + return 0; out_free_dev: |