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Diffstat (limited to 'net/bluetooth/hci_core.c')
-rw-r--r--net/bluetooth/hci_core.c115
1 files changed, 96 insertions, 19 deletions
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 2f00322..b372fb8 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -41,6 +41,7 @@
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/rfkill.h>
+#include <linux/timer.h>
#include <net/sock.h>
#include <asm/system.h>
@@ -123,7 +124,7 @@ static void hci_req_cancel(struct hci_dev *hdev, int err)
/* Execute request and wait for completion. */
static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
- unsigned long opt, __u32 timeout)
+ unsigned long opt, __u32 timeout)
{
DECLARE_WAITQUEUE(wait, current);
int err = 0;
@@ -165,7 +166,7 @@ static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev,
}
static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
- unsigned long opt, __u32 timeout)
+ unsigned long opt, __u32 timeout)
{
int ret;
@@ -263,6 +264,14 @@ static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
}
+static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
+{
+ BT_DBG("%s", hdev->name);
+
+ /* Read LE buffer size */
+ hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
+}
+
static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
{
__u8 scan = opt;
@@ -456,7 +465,7 @@ int hci_inquiry(void __user *arg)
/* cache_dump can't sleep. Therefore we allocate temp buffer and then
* copy it to the user space.
*/
- buf = kmalloc(sizeof(struct inquiry_info) *max_rsp, GFP_KERNEL);
+ buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
if (!buf) {
err = -ENOMEM;
goto done;
@@ -525,10 +534,13 @@ int hci_dev_open(__u16 dev)
set_bit(HCI_INIT, &hdev->flags);
hdev->init_last_cmd = 0;
- //__hci_request(hdev, hci_reset_req, 0, HZ);
ret = __hci_request(hdev, hci_init_req, 0,
msecs_to_jiffies(HCI_INIT_TIMEOUT));
+ if (lmp_le_capable(hdev))
+ ret = __hci_request(hdev, hci_le_init_req, 0,
+ msecs_to_jiffies(HCI_INIT_TIMEOUT));
+
clear_bit(HCI_INIT, &hdev->flags);
}
@@ -611,6 +623,7 @@ static int hci_dev_do_close(struct hci_dev *hdev)
/* Drop last sent command */
if (hdev->sent_cmd) {
+ del_timer_sync(&hdev->cmd_timer);
kfree_skb(hdev->sent_cmd);
hdev->sent_cmd = NULL;
}
@@ -671,7 +684,7 @@ int hci_dev_reset(__u16 dev)
hdev->flush(hdev);
atomic_set(&hdev->cmd_cnt, 1);
- hdev->acl_cnt = 0; hdev->sco_cnt = 0;
+ hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
if (!test_bit(HCI_RAW, &hdev->flags))
ret = __hci_request(hdev, hci_reset_req, 0,
@@ -1054,6 +1067,16 @@ int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
return 0;
}
+/* HCI command timer function */
+static void hci_cmd_timer(unsigned long arg)
+{
+ struct hci_dev *hdev = (void *) arg;
+
+ BT_ERR("%s command tx timeout", hdev->name);
+ atomic_set(&hdev->cmd_cnt, 1);
+ tasklet_schedule(&hdev->cmd_task);
+}
+
/* Register HCI device */
int hci_register_dev(struct hci_dev *hdev)
{
@@ -1100,6 +1123,8 @@ int hci_register_dev(struct hci_dev *hdev)
skb_queue_head_init(&hdev->cmd_q);
skb_queue_head_init(&hdev->raw_q);
+ setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
+
for (i = 0; i < NUM_REASSEMBLY; i++)
hdev->reassembly[i] = NULL;
@@ -1187,6 +1212,8 @@ int hci_unregister_dev(struct hci_dev *hdev)
hci_unregister_sysfs(hdev);
+ hci_del_off_timer(hdev);
+
destroy_workqueue(hdev->workqueue);
hci_dev_lock_bh(hdev);
@@ -1672,8 +1699,25 @@ static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int
}
if (conn) {
- int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt);
- int q = cnt / num;
+ int cnt, q;
+
+ switch (conn->type) {
+ case ACL_LINK:
+ cnt = hdev->acl_cnt;
+ break;
+ case SCO_LINK:
+ case ESCO_LINK:
+ cnt = hdev->sco_cnt;
+ break;
+ case LE_LINK:
+ cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
+ break;
+ default:
+ cnt = 0;
+ BT_ERR("Unknown link type");
+ }
+
+ q = cnt / num;
*quote = q ? q : 1;
} else
*quote = 0;
@@ -1682,19 +1726,19 @@ static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int
return conn;
}
-static inline void hci_acl_tx_to(struct hci_dev *hdev)
+static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
{
struct hci_conn_hash *h = &hdev->conn_hash;
struct list_head *p;
struct hci_conn *c;
- BT_ERR("%s ACL tx timeout", hdev->name);
+ BT_ERR("%s link tx timeout", hdev->name);
/* Kill stalled connections */
list_for_each(p, &h->list) {
c = list_entry(p, struct hci_conn, list);
- if (c->type == ACL_LINK && c->sent) {
- BT_ERR("%s killing stalled ACL connection %s",
+ if (c->type == type && c->sent) {
+ BT_ERR("%s killing stalled connection %s",
hdev->name, batostr(&c->dst));
hci_acl_disconn(c, 0x13);
}
@@ -1713,7 +1757,7 @@ static inline void hci_sched_acl(struct hci_dev *hdev)
/* ACL tx timeout must be longer than maximum
* link supervision timeout (40.9 seconds) */
if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45))
- hci_acl_tx_to(hdev);
+ hci_link_tx_to(hdev, ACL_LINK);
}
while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, &quote))) {
@@ -1772,6 +1816,40 @@ static inline void hci_sched_esco(struct hci_dev *hdev)
}
}
+static inline void hci_sched_le(struct hci_dev *hdev)
+{
+ struct hci_conn *conn;
+ struct sk_buff *skb;
+ int quote, cnt;
+
+ BT_DBG("%s", hdev->name);
+
+ if (!test_bit(HCI_RAW, &hdev->flags)) {
+ /* LE tx timeout must be longer than maximum
+ * link supervision timeout (40.9 seconds) */
+ if (!hdev->le_cnt && hdev->le_pkts &&
+ time_after(jiffies, hdev->le_last_tx + HZ * 45))
+ hci_link_tx_to(hdev, LE_LINK);
+ }
+
+ cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
+ while (cnt && (conn = hci_low_sent(hdev, LE_LINK, &quote))) {
+ while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
+ BT_DBG("skb %p len %d", skb, skb->len);
+
+ hci_send_frame(skb);
+ hdev->le_last_tx = jiffies;
+
+ cnt--;
+ conn->sent++;
+ }
+ }
+ if (hdev->le_pkts)
+ hdev->le_cnt = cnt;
+ else
+ hdev->acl_cnt = cnt;
+}
+
static void hci_tx_task(unsigned long arg)
{
struct hci_dev *hdev = (struct hci_dev *) arg;
@@ -1779,7 +1857,8 @@ static void hci_tx_task(unsigned long arg)
read_lock(&hci_task_lock);
- BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt);
+ BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
+ hdev->sco_cnt, hdev->le_cnt);
/* Schedule queues and send stuff to HCI driver */
@@ -1789,6 +1868,8 @@ static void hci_tx_task(unsigned long arg)
hci_sched_esco(hdev);
+ hci_sched_le(hdev);
+
/* Send next queued raw (unknown type) packet */
while ((skb = skb_dequeue(&hdev->raw_q)))
hci_send_frame(skb);
@@ -1936,11 +2017,6 @@ static void hci_cmd_task(unsigned long arg)
BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
- if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) {
- BT_ERR("%s command tx timeout", hdev->name);
- atomic_set(&hdev->cmd_cnt, 1);
- }
-
/* Send queued commands */
if (atomic_read(&hdev->cmd_cnt)) {
skb = skb_dequeue(&hdev->cmd_q);
@@ -1953,7 +2029,8 @@ static void hci_cmd_task(unsigned long arg)
if (hdev->sent_cmd) {
atomic_dec(&hdev->cmd_cnt);
hci_send_frame(skb);
- hdev->cmd_last_tx = jiffies;
+ mod_timer(&hdev->cmd_timer,
+ jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
} else {
skb_queue_head(&hdev->cmd_q, skb);
tasklet_schedule(&hdev->cmd_task);
generated by cgit v1.1 at 2025-08-16 01:22:51 +0000