YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | BlueZ - Bluetooth protocol stack for Linux |
| 3 | Copyright (C) 2000-2001 Qualcomm Incorporated |
| 4 | |
| 5 | Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com> |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License version 2 as |
| 9 | published by the Free Software Foundation; |
| 10 | |
| 11 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 12 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 13 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. |
| 14 | IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 15 | CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES |
| 16 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 17 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 19 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | SOFTWARE IS DISCLAIMED. |
| 23 | */ |
| 24 | |
| 25 | /* Bluetooth HCI core. */ |
| 26 | |
S.Çağlar Onur | 8245302 | 2008-02-17 23:25:57 -0800 | [diff] [blame] | 27 | #include <linux/jiffies.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/module.h> |
| 29 | #include <linux/kmod.h> |
| 30 | |
| 31 | #include <linux/types.h> |
| 32 | #include <linux/errno.h> |
| 33 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/sched.h> |
| 35 | #include <linux/slab.h> |
| 36 | #include <linux/poll.h> |
| 37 | #include <linux/fcntl.h> |
| 38 | #include <linux/init.h> |
| 39 | #include <linux/skbuff.h> |
| 40 | #include <linux/interrupt.h> |
| 41 | #include <linux/notifier.h> |
| 42 | #include <net/sock.h> |
| 43 | |
| 44 | #include <asm/system.h> |
| 45 | #include <asm/uaccess.h> |
| 46 | #include <asm/unaligned.h> |
| 47 | |
| 48 | #include <net/bluetooth/bluetooth.h> |
| 49 | #include <net/bluetooth/hci_core.h> |
| 50 | |
| 51 | #ifndef CONFIG_BT_HCI_CORE_DEBUG |
| 52 | #undef BT_DBG |
| 53 | #define BT_DBG(D...) |
| 54 | #endif |
| 55 | |
| 56 | static void hci_cmd_task(unsigned long arg); |
| 57 | static void hci_rx_task(unsigned long arg); |
| 58 | static void hci_tx_task(unsigned long arg); |
| 59 | static void hci_notify(struct hci_dev *hdev, int event); |
| 60 | |
| 61 | static DEFINE_RWLOCK(hci_task_lock); |
| 62 | |
| 63 | /* HCI device list */ |
| 64 | LIST_HEAD(hci_dev_list); |
| 65 | DEFINE_RWLOCK(hci_dev_list_lock); |
| 66 | |
| 67 | /* HCI callback list */ |
| 68 | LIST_HEAD(hci_cb_list); |
| 69 | DEFINE_RWLOCK(hci_cb_list_lock); |
| 70 | |
| 71 | /* HCI protocols */ |
| 72 | #define HCI_MAX_PROTO 2 |
| 73 | struct hci_proto *hci_proto[HCI_MAX_PROTO]; |
| 74 | |
| 75 | /* HCI notifiers list */ |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 76 | static ATOMIC_NOTIFIER_HEAD(hci_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | /* ---- HCI notifications ---- */ |
| 79 | |
| 80 | int hci_register_notifier(struct notifier_block *nb) |
| 81 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 82 | return atomic_notifier_chain_register(&hci_notifier, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | } |
| 84 | |
| 85 | int hci_unregister_notifier(struct notifier_block *nb) |
| 86 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 87 | return atomic_notifier_chain_unregister(&hci_notifier, nb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | } |
| 89 | |
Marcel Holtmann | 6516455 | 2005-10-28 19:20:48 +0200 | [diff] [blame] | 90 | static void hci_notify(struct hci_dev *hdev, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | { |
Alan Stern | e041c68 | 2006-03-27 01:16:30 -0800 | [diff] [blame] | 92 | atomic_notifier_call_chain(&hci_notifier, event, hdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | /* ---- HCI requests ---- */ |
| 96 | |
| 97 | void hci_req_complete(struct hci_dev *hdev, int result) |
| 98 | { |
| 99 | BT_DBG("%s result 0x%2.2x", hdev->name, result); |
| 100 | |
| 101 | if (hdev->req_status == HCI_REQ_PEND) { |
| 102 | hdev->req_result = result; |
| 103 | hdev->req_status = HCI_REQ_DONE; |
| 104 | wake_up_interruptible(&hdev->req_wait_q); |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | static void hci_req_cancel(struct hci_dev *hdev, int err) |
| 109 | { |
| 110 | BT_DBG("%s err 0x%2.2x", hdev->name, err); |
| 111 | |
| 112 | if (hdev->req_status == HCI_REQ_PEND) { |
| 113 | hdev->req_result = err; |
| 114 | hdev->req_status = HCI_REQ_CANCELED; |
| 115 | wake_up_interruptible(&hdev->req_wait_q); |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | /* Execute request and wait for completion. */ |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 120 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | unsigned long opt, __u32 timeout) |
| 122 | { |
| 123 | DECLARE_WAITQUEUE(wait, current); |
| 124 | int err = 0; |
| 125 | |
| 126 | BT_DBG("%s start", hdev->name); |
| 127 | |
| 128 | hdev->req_status = HCI_REQ_PEND; |
| 129 | |
| 130 | add_wait_queue(&hdev->req_wait_q, &wait); |
| 131 | set_current_state(TASK_INTERRUPTIBLE); |
| 132 | |
| 133 | req(hdev, opt); |
| 134 | schedule_timeout(timeout); |
| 135 | |
| 136 | remove_wait_queue(&hdev->req_wait_q, &wait); |
| 137 | |
| 138 | if (signal_pending(current)) |
| 139 | return -EINTR; |
| 140 | |
| 141 | switch (hdev->req_status) { |
| 142 | case HCI_REQ_DONE: |
| 143 | err = -bt_err(hdev->req_result); |
| 144 | break; |
| 145 | |
| 146 | case HCI_REQ_CANCELED: |
| 147 | err = -hdev->req_result; |
| 148 | break; |
| 149 | |
| 150 | default: |
| 151 | err = -ETIMEDOUT; |
| 152 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 153 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
| 155 | hdev->req_status = hdev->req_result = 0; |
| 156 | |
| 157 | BT_DBG("%s end: err %d", hdev->name, err); |
| 158 | |
| 159 | return err; |
| 160 | } |
| 161 | |
| 162 | static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
| 163 | unsigned long opt, __u32 timeout) |
| 164 | { |
| 165 | int ret; |
| 166 | |
Marcel Holtmann | 7c6a329 | 2008-09-12 03:11:54 +0200 | [diff] [blame^] | 167 | if (!test_bit(HCI_UP, &hdev->flags)) |
| 168 | return -ENETDOWN; |
| 169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | /* Serialize all requests */ |
| 171 | hci_req_lock(hdev); |
| 172 | ret = __hci_request(hdev, req, opt, timeout); |
| 173 | hci_req_unlock(hdev); |
| 174 | |
| 175 | return ret; |
| 176 | } |
| 177 | |
| 178 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) |
| 179 | { |
| 180 | BT_DBG("%s %ld", hdev->name, opt); |
| 181 | |
| 182 | /* Reset device */ |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 183 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | } |
| 185 | |
| 186 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) |
| 187 | { |
| 188 | struct sk_buff *skb; |
Marcel Holtmann | 1ebb925 | 2005-11-08 09:57:21 -0800 | [diff] [blame] | 189 | __le16 param; |
Marcel Holtmann | 89f2783 | 2007-09-09 08:39:49 +0200 | [diff] [blame] | 190 | __u8 flt_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
| 192 | BT_DBG("%s %ld", hdev->name, opt); |
| 193 | |
| 194 | /* Driver initialization */ |
| 195 | |
| 196 | /* Special commands */ |
| 197 | while ((skb = skb_dequeue(&hdev->driver_init))) { |
Marcel Holtmann | 0d48d93 | 2005-08-09 20:30:28 -0700 | [diff] [blame] | 198 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | skb->dev = (void *) hdev; |
| 200 | skb_queue_tail(&hdev->cmd_q, skb); |
| 201 | hci_sched_cmd(hdev); |
| 202 | } |
| 203 | skb_queue_purge(&hdev->driver_init); |
| 204 | |
| 205 | /* Mandatory initialization */ |
| 206 | |
| 207 | /* Reset */ |
| 208 | if (test_bit(HCI_QUIRK_RESET_ON_INIT, &hdev->quirks)) |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 209 | hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | |
| 211 | /* Read Local Supported Features */ |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 212 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
Marcel Holtmann | 1143e5a | 2006-09-23 09:57:20 +0200 | [diff] [blame] | 214 | /* Read Local Version */ |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 215 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL); |
Marcel Holtmann | 1143e5a | 2006-09-23 09:57:20 +0200 | [diff] [blame] | 216 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 218 | hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
| 220 | #if 0 |
| 221 | /* Host buffer size */ |
| 222 | { |
| 223 | struct hci_cp_host_buffer_size cp; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 224 | cp.acl_mtu = cpu_to_le16(HCI_MAX_ACL_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | cp.sco_mtu = HCI_MAX_SCO_SIZE; |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 226 | cp.acl_max_pkt = cpu_to_le16(0xffff); |
| 227 | cp.sco_max_pkt = cpu_to_le16(0xffff); |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 228 | hci_send_cmd(hdev, HCI_OP_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | } |
| 230 | #endif |
| 231 | |
| 232 | /* Read BD Address */ |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 233 | hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL); |
| 234 | |
| 235 | /* Read Class of Device */ |
| 236 | hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL); |
| 237 | |
| 238 | /* Read Local Name */ |
| 239 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | |
| 241 | /* Read Voice Setting */ |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 242 | hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
| 244 | /* Optional initialization */ |
| 245 | |
| 246 | /* Clear Event Filters */ |
Marcel Holtmann | 89f2783 | 2007-09-09 08:39:49 +0200 | [diff] [blame] | 247 | flt_type = HCI_FLT_CLEAR_ALL; |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 248 | hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | |
| 250 | /* Page timeout ~20 secs */ |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 251 | param = cpu_to_le16(0x8000); |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 252 | hci_send_cmd(hdev, HCI_OP_WRITE_PG_TIMEOUT, 2, ¶m); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | |
| 254 | /* Connection accept timeout ~20 secs */ |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 255 | param = cpu_to_le16(0x7d00); |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 256 | hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, ¶m); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) |
| 260 | { |
| 261 | __u8 scan = opt; |
| 262 | |
| 263 | BT_DBG("%s %x", hdev->name, scan); |
| 264 | |
| 265 | /* Inquiry and Page scans */ |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 266 | hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | } |
| 268 | |
| 269 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) |
| 270 | { |
| 271 | __u8 auth = opt; |
| 272 | |
| 273 | BT_DBG("%s %x", hdev->name, auth); |
| 274 | |
| 275 | /* Authentication */ |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 276 | hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | } |
| 278 | |
| 279 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) |
| 280 | { |
| 281 | __u8 encrypt = opt; |
| 282 | |
| 283 | BT_DBG("%s %x", hdev->name, encrypt); |
| 284 | |
Marcel Holtmann | e4e8e37 | 2008-07-14 20:13:47 +0200 | [diff] [blame] | 285 | /* Encryption */ |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 286 | hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
Marcel Holtmann | e4e8e37 | 2008-07-14 20:13:47 +0200 | [diff] [blame] | 289 | static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt) |
| 290 | { |
| 291 | __le16 policy = cpu_to_le16(opt); |
| 292 | |
| 293 | BT_DBG("%s %x", hdev->name, opt); |
| 294 | |
| 295 | /* Default link policy */ |
| 296 | hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy); |
| 297 | } |
| 298 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 299 | /* Get HCI device by index. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | * Device is held on return. */ |
| 301 | struct hci_dev *hci_dev_get(int index) |
| 302 | { |
| 303 | struct hci_dev *hdev = NULL; |
| 304 | struct list_head *p; |
| 305 | |
| 306 | BT_DBG("%d", index); |
| 307 | |
| 308 | if (index < 0) |
| 309 | return NULL; |
| 310 | |
| 311 | read_lock(&hci_dev_list_lock); |
| 312 | list_for_each(p, &hci_dev_list) { |
| 313 | struct hci_dev *d = list_entry(p, struct hci_dev, list); |
| 314 | if (d->id == index) { |
| 315 | hdev = hci_dev_hold(d); |
| 316 | break; |
| 317 | } |
| 318 | } |
| 319 | read_unlock(&hci_dev_list_lock); |
| 320 | return hdev; |
| 321 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
| 323 | /* ---- Inquiry support ---- */ |
| 324 | static void inquiry_cache_flush(struct hci_dev *hdev) |
| 325 | { |
| 326 | struct inquiry_cache *cache = &hdev->inq_cache; |
| 327 | struct inquiry_entry *next = cache->list, *e; |
| 328 | |
| 329 | BT_DBG("cache %p", cache); |
| 330 | |
| 331 | cache->list = NULL; |
| 332 | while ((e = next)) { |
| 333 | next = e->next; |
| 334 | kfree(e); |
| 335 | } |
| 336 | } |
| 337 | |
| 338 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| 339 | { |
| 340 | struct inquiry_cache *cache = &hdev->inq_cache; |
| 341 | struct inquiry_entry *e; |
| 342 | |
| 343 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); |
| 344 | |
| 345 | for (e = cache->list; e; e = e->next) |
| 346 | if (!bacmp(&e->data.bdaddr, bdaddr)) |
| 347 | break; |
| 348 | return e; |
| 349 | } |
| 350 | |
| 351 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) |
| 352 | { |
| 353 | struct inquiry_cache *cache = &hdev->inq_cache; |
| 354 | struct inquiry_entry *e; |
| 355 | |
| 356 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); |
| 357 | |
| 358 | if (!(e = hci_inquiry_cache_lookup(hdev, &data->bdaddr))) { |
| 359 | /* Entry not in the cache. Add new one. */ |
Marcel Holtmann | 25ea6db | 2006-07-06 15:40:09 +0200 | [diff] [blame] | 360 | if (!(e = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | e->next = cache->list; |
| 363 | cache->list = e; |
| 364 | } |
| 365 | |
| 366 | memcpy(&e->data, data, sizeof(*data)); |
| 367 | e->timestamp = jiffies; |
| 368 | cache->timestamp = jiffies; |
| 369 | } |
| 370 | |
| 371 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) |
| 372 | { |
| 373 | struct inquiry_cache *cache = &hdev->inq_cache; |
| 374 | struct inquiry_info *info = (struct inquiry_info *) buf; |
| 375 | struct inquiry_entry *e; |
| 376 | int copied = 0; |
| 377 | |
| 378 | for (e = cache->list; e && copied < num; e = e->next, copied++) { |
| 379 | struct inquiry_data *data = &e->data; |
| 380 | bacpy(&info->bdaddr, &data->bdaddr); |
| 381 | info->pscan_rep_mode = data->pscan_rep_mode; |
| 382 | info->pscan_period_mode = data->pscan_period_mode; |
| 383 | info->pscan_mode = data->pscan_mode; |
| 384 | memcpy(info->dev_class, data->dev_class, 3); |
| 385 | info->clock_offset = data->clock_offset; |
| 386 | info++; |
| 387 | } |
| 388 | |
| 389 | BT_DBG("cache %p, copied %d", cache, copied); |
| 390 | return copied; |
| 391 | } |
| 392 | |
| 393 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) |
| 394 | { |
| 395 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; |
| 396 | struct hci_cp_inquiry cp; |
| 397 | |
| 398 | BT_DBG("%s", hdev->name); |
| 399 | |
| 400 | if (test_bit(HCI_INQUIRY, &hdev->flags)) |
| 401 | return; |
| 402 | |
| 403 | /* Start Inquiry */ |
| 404 | memcpy(&cp.lap, &ir->lap, 3); |
| 405 | cp.length = ir->length; |
| 406 | cp.num_rsp = ir->num_rsp; |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 407 | hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | } |
| 409 | |
| 410 | int hci_inquiry(void __user *arg) |
| 411 | { |
| 412 | __u8 __user *ptr = arg; |
| 413 | struct hci_inquiry_req ir; |
| 414 | struct hci_dev *hdev; |
| 415 | int err = 0, do_inquiry = 0, max_rsp; |
| 416 | long timeo; |
| 417 | __u8 *buf; |
| 418 | |
| 419 | if (copy_from_user(&ir, ptr, sizeof(ir))) |
| 420 | return -EFAULT; |
| 421 | |
| 422 | if (!(hdev = hci_dev_get(ir.dev_id))) |
| 423 | return -ENODEV; |
| 424 | |
| 425 | hci_dev_lock_bh(hdev); |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 426 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | inquiry_cache_empty(hdev) || |
| 428 | ir.flags & IREQ_CACHE_FLUSH) { |
| 429 | inquiry_cache_flush(hdev); |
| 430 | do_inquiry = 1; |
| 431 | } |
| 432 | hci_dev_unlock_bh(hdev); |
| 433 | |
Marcel Holtmann | 04837f6 | 2006-07-03 10:02:33 +0200 | [diff] [blame] | 434 | timeo = ir.length * msecs_to_jiffies(2000); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | if (do_inquiry && (err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo)) < 0) |
| 436 | goto done; |
| 437 | |
| 438 | /* for unlimited number of responses we will use buffer with 255 entries */ |
| 439 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; |
| 440 | |
| 441 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then |
| 442 | * copy it to the user space. |
| 443 | */ |
| 444 | if (!(buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL))) { |
| 445 | err = -ENOMEM; |
| 446 | goto done; |
| 447 | } |
| 448 | |
| 449 | hci_dev_lock_bh(hdev); |
| 450 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); |
| 451 | hci_dev_unlock_bh(hdev); |
| 452 | |
| 453 | BT_DBG("num_rsp %d", ir.num_rsp); |
| 454 | |
| 455 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { |
| 456 | ptr += sizeof(ir); |
| 457 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * |
| 458 | ir.num_rsp)) |
| 459 | err = -EFAULT; |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 460 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | err = -EFAULT; |
| 462 | |
| 463 | kfree(buf); |
| 464 | |
| 465 | done: |
| 466 | hci_dev_put(hdev); |
| 467 | return err; |
| 468 | } |
| 469 | |
| 470 | /* ---- HCI ioctl helpers ---- */ |
| 471 | |
| 472 | int hci_dev_open(__u16 dev) |
| 473 | { |
| 474 | struct hci_dev *hdev; |
| 475 | int ret = 0; |
| 476 | |
| 477 | if (!(hdev = hci_dev_get(dev))) |
| 478 | return -ENODEV; |
| 479 | |
| 480 | BT_DBG("%s %p", hdev->name, hdev); |
| 481 | |
| 482 | hci_req_lock(hdev); |
| 483 | |
| 484 | if (test_bit(HCI_UP, &hdev->flags)) { |
| 485 | ret = -EALREADY; |
| 486 | goto done; |
| 487 | } |
| 488 | |
| 489 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) |
| 490 | set_bit(HCI_RAW, &hdev->flags); |
| 491 | |
| 492 | if (hdev->open(hdev)) { |
| 493 | ret = -EIO; |
| 494 | goto done; |
| 495 | } |
| 496 | |
| 497 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
| 498 | atomic_set(&hdev->cmd_cnt, 1); |
| 499 | set_bit(HCI_INIT, &hdev->flags); |
| 500 | |
| 501 | //__hci_request(hdev, hci_reset_req, 0, HZ); |
Marcel Holtmann | 04837f6 | 2006-07-03 10:02:33 +0200 | [diff] [blame] | 502 | ret = __hci_request(hdev, hci_init_req, 0, |
| 503 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | |
| 505 | clear_bit(HCI_INIT, &hdev->flags); |
| 506 | } |
| 507 | |
| 508 | if (!ret) { |
| 509 | hci_dev_hold(hdev); |
| 510 | set_bit(HCI_UP, &hdev->flags); |
| 511 | hci_notify(hdev, HCI_DEV_UP); |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 512 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | /* Init failed, cleanup */ |
| 514 | tasklet_kill(&hdev->rx_task); |
| 515 | tasklet_kill(&hdev->tx_task); |
| 516 | tasklet_kill(&hdev->cmd_task); |
| 517 | |
| 518 | skb_queue_purge(&hdev->cmd_q); |
| 519 | skb_queue_purge(&hdev->rx_q); |
| 520 | |
| 521 | if (hdev->flush) |
| 522 | hdev->flush(hdev); |
| 523 | |
| 524 | if (hdev->sent_cmd) { |
| 525 | kfree_skb(hdev->sent_cmd); |
| 526 | hdev->sent_cmd = NULL; |
| 527 | } |
| 528 | |
| 529 | hdev->close(hdev); |
| 530 | hdev->flags = 0; |
| 531 | } |
| 532 | |
| 533 | done: |
| 534 | hci_req_unlock(hdev); |
| 535 | hci_dev_put(hdev); |
| 536 | return ret; |
| 537 | } |
| 538 | |
| 539 | static int hci_dev_do_close(struct hci_dev *hdev) |
| 540 | { |
| 541 | BT_DBG("%s %p", hdev->name, hdev); |
| 542 | |
| 543 | hci_req_cancel(hdev, ENODEV); |
| 544 | hci_req_lock(hdev); |
| 545 | |
| 546 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { |
| 547 | hci_req_unlock(hdev); |
| 548 | return 0; |
| 549 | } |
| 550 | |
| 551 | /* Kill RX and TX tasks */ |
| 552 | tasklet_kill(&hdev->rx_task); |
| 553 | tasklet_kill(&hdev->tx_task); |
| 554 | |
| 555 | hci_dev_lock_bh(hdev); |
| 556 | inquiry_cache_flush(hdev); |
| 557 | hci_conn_hash_flush(hdev); |
| 558 | hci_dev_unlock_bh(hdev); |
| 559 | |
| 560 | hci_notify(hdev, HCI_DEV_DOWN); |
| 561 | |
| 562 | if (hdev->flush) |
| 563 | hdev->flush(hdev); |
| 564 | |
| 565 | /* Reset device */ |
| 566 | skb_queue_purge(&hdev->cmd_q); |
| 567 | atomic_set(&hdev->cmd_cnt, 1); |
| 568 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
| 569 | set_bit(HCI_INIT, &hdev->flags); |
Marcel Holtmann | 04837f6 | 2006-07-03 10:02:33 +0200 | [diff] [blame] | 570 | __hci_request(hdev, hci_reset_req, 0, |
| 571 | msecs_to_jiffies(250)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | clear_bit(HCI_INIT, &hdev->flags); |
| 573 | } |
| 574 | |
| 575 | /* Kill cmd task */ |
| 576 | tasklet_kill(&hdev->cmd_task); |
| 577 | |
| 578 | /* Drop queues */ |
| 579 | skb_queue_purge(&hdev->rx_q); |
| 580 | skb_queue_purge(&hdev->cmd_q); |
| 581 | skb_queue_purge(&hdev->raw_q); |
| 582 | |
| 583 | /* Drop last sent command */ |
| 584 | if (hdev->sent_cmd) { |
| 585 | kfree_skb(hdev->sent_cmd); |
| 586 | hdev->sent_cmd = NULL; |
| 587 | } |
| 588 | |
| 589 | /* After this point our queues are empty |
| 590 | * and no tasks are scheduled. */ |
| 591 | hdev->close(hdev); |
| 592 | |
| 593 | /* Clear flags */ |
| 594 | hdev->flags = 0; |
| 595 | |
| 596 | hci_req_unlock(hdev); |
| 597 | |
| 598 | hci_dev_put(hdev); |
| 599 | return 0; |
| 600 | } |
| 601 | |
| 602 | int hci_dev_close(__u16 dev) |
| 603 | { |
| 604 | struct hci_dev *hdev; |
| 605 | int err; |
| 606 | |
| 607 | if (!(hdev = hci_dev_get(dev))) |
| 608 | return -ENODEV; |
| 609 | err = hci_dev_do_close(hdev); |
| 610 | hci_dev_put(hdev); |
| 611 | return err; |
| 612 | } |
| 613 | |
| 614 | int hci_dev_reset(__u16 dev) |
| 615 | { |
| 616 | struct hci_dev *hdev; |
| 617 | int ret = 0; |
| 618 | |
| 619 | if (!(hdev = hci_dev_get(dev))) |
| 620 | return -ENODEV; |
| 621 | |
| 622 | hci_req_lock(hdev); |
| 623 | tasklet_disable(&hdev->tx_task); |
| 624 | |
| 625 | if (!test_bit(HCI_UP, &hdev->flags)) |
| 626 | goto done; |
| 627 | |
| 628 | /* Drop queues */ |
| 629 | skb_queue_purge(&hdev->rx_q); |
| 630 | skb_queue_purge(&hdev->cmd_q); |
| 631 | |
| 632 | hci_dev_lock_bh(hdev); |
| 633 | inquiry_cache_flush(hdev); |
| 634 | hci_conn_hash_flush(hdev); |
| 635 | hci_dev_unlock_bh(hdev); |
| 636 | |
| 637 | if (hdev->flush) |
| 638 | hdev->flush(hdev); |
| 639 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 640 | atomic_set(&hdev->cmd_cnt, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; |
| 642 | |
| 643 | if (!test_bit(HCI_RAW, &hdev->flags)) |
Marcel Holtmann | 04837f6 | 2006-07-03 10:02:33 +0200 | [diff] [blame] | 644 | ret = __hci_request(hdev, hci_reset_req, 0, |
| 645 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | |
| 647 | done: |
| 648 | tasklet_enable(&hdev->tx_task); |
| 649 | hci_req_unlock(hdev); |
| 650 | hci_dev_put(hdev); |
| 651 | return ret; |
| 652 | } |
| 653 | |
| 654 | int hci_dev_reset_stat(__u16 dev) |
| 655 | { |
| 656 | struct hci_dev *hdev; |
| 657 | int ret = 0; |
| 658 | |
| 659 | if (!(hdev = hci_dev_get(dev))) |
| 660 | return -ENODEV; |
| 661 | |
| 662 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
| 663 | |
| 664 | hci_dev_put(hdev); |
| 665 | |
| 666 | return ret; |
| 667 | } |
| 668 | |
| 669 | int hci_dev_cmd(unsigned int cmd, void __user *arg) |
| 670 | { |
| 671 | struct hci_dev *hdev; |
| 672 | struct hci_dev_req dr; |
| 673 | int err = 0; |
| 674 | |
| 675 | if (copy_from_user(&dr, arg, sizeof(dr))) |
| 676 | return -EFAULT; |
| 677 | |
| 678 | if (!(hdev = hci_dev_get(dr.dev_id))) |
| 679 | return -ENODEV; |
| 680 | |
| 681 | switch (cmd) { |
| 682 | case HCISETAUTH: |
Marcel Holtmann | 04837f6 | 2006-07-03 10:02:33 +0200 | [diff] [blame] | 683 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
| 684 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | break; |
| 686 | |
| 687 | case HCISETENCRYPT: |
| 688 | if (!lmp_encrypt_capable(hdev)) { |
| 689 | err = -EOPNOTSUPP; |
| 690 | break; |
| 691 | } |
| 692 | |
| 693 | if (!test_bit(HCI_AUTH, &hdev->flags)) { |
| 694 | /* Auth must be enabled first */ |
Marcel Holtmann | 04837f6 | 2006-07-03 10:02:33 +0200 | [diff] [blame] | 695 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, |
| 696 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 697 | if (err) |
| 698 | break; |
| 699 | } |
| 700 | |
Marcel Holtmann | 04837f6 | 2006-07-03 10:02:33 +0200 | [diff] [blame] | 701 | err = hci_request(hdev, hci_encrypt_req, dr.dev_opt, |
| 702 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 703 | break; |
| 704 | |
| 705 | case HCISETSCAN: |
Marcel Holtmann | 04837f6 | 2006-07-03 10:02:33 +0200 | [diff] [blame] | 706 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, |
| 707 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | break; |
| 709 | |
Marcel Holtmann | e4e8e37 | 2008-07-14 20:13:47 +0200 | [diff] [blame] | 710 | case HCISETLINKPOL: |
| 711 | err = hci_request(hdev, hci_linkpol_req, dr.dev_opt, |
| 712 | msecs_to_jiffies(HCI_INIT_TIMEOUT)); |
| 713 | break; |
| 714 | |
| 715 | case HCISETLINKMODE: |
| 716 | hdev->link_mode = ((__u16) dr.dev_opt) & |
| 717 | (HCI_LM_MASTER | HCI_LM_ACCEPT); |
| 718 | break; |
| 719 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | case HCISETPTYPE: |
| 721 | hdev->pkt_type = (__u16) dr.dev_opt; |
| 722 | break; |
| 723 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | case HCISETACLMTU: |
Marcel Holtmann | e4e8e37 | 2008-07-14 20:13:47 +0200 | [diff] [blame] | 725 | hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1); |
| 726 | hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | break; |
| 728 | |
| 729 | case HCISETSCOMTU: |
Marcel Holtmann | e4e8e37 | 2008-07-14 20:13:47 +0200 | [diff] [blame] | 730 | hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1); |
| 731 | hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | break; |
| 733 | |
| 734 | default: |
| 735 | err = -EINVAL; |
| 736 | break; |
| 737 | } |
Marcel Holtmann | e4e8e37 | 2008-07-14 20:13:47 +0200 | [diff] [blame] | 738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | hci_dev_put(hdev); |
| 740 | return err; |
| 741 | } |
| 742 | |
| 743 | int hci_get_dev_list(void __user *arg) |
| 744 | { |
| 745 | struct hci_dev_list_req *dl; |
| 746 | struct hci_dev_req *dr; |
| 747 | struct list_head *p; |
| 748 | int n = 0, size, err; |
| 749 | __u16 dev_num; |
| 750 | |
| 751 | if (get_user(dev_num, (__u16 __user *) arg)) |
| 752 | return -EFAULT; |
| 753 | |
| 754 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) |
| 755 | return -EINVAL; |
| 756 | |
| 757 | size = sizeof(*dl) + dev_num * sizeof(*dr); |
| 758 | |
| 759 | if (!(dl = kmalloc(size, GFP_KERNEL))) |
| 760 | return -ENOMEM; |
| 761 | |
| 762 | dr = dl->dev_req; |
| 763 | |
| 764 | read_lock_bh(&hci_dev_list_lock); |
| 765 | list_for_each(p, &hci_dev_list) { |
| 766 | struct hci_dev *hdev; |
| 767 | hdev = list_entry(p, struct hci_dev, list); |
| 768 | (dr + n)->dev_id = hdev->id; |
| 769 | (dr + n)->dev_opt = hdev->flags; |
| 770 | if (++n >= dev_num) |
| 771 | break; |
| 772 | } |
| 773 | read_unlock_bh(&hci_dev_list_lock); |
| 774 | |
| 775 | dl->dev_num = n; |
| 776 | size = sizeof(*dl) + n * sizeof(*dr); |
| 777 | |
| 778 | err = copy_to_user(arg, dl, size); |
| 779 | kfree(dl); |
| 780 | |
| 781 | return err ? -EFAULT : 0; |
| 782 | } |
| 783 | |
| 784 | int hci_get_dev_info(void __user *arg) |
| 785 | { |
| 786 | struct hci_dev *hdev; |
| 787 | struct hci_dev_info di; |
| 788 | int err = 0; |
| 789 | |
| 790 | if (copy_from_user(&di, arg, sizeof(di))) |
| 791 | return -EFAULT; |
| 792 | |
| 793 | if (!(hdev = hci_dev_get(di.dev_id))) |
| 794 | return -ENODEV; |
| 795 | |
| 796 | strcpy(di.name, hdev->name); |
| 797 | di.bdaddr = hdev->bdaddr; |
| 798 | di.type = hdev->type; |
| 799 | di.flags = hdev->flags; |
| 800 | di.pkt_type = hdev->pkt_type; |
| 801 | di.acl_mtu = hdev->acl_mtu; |
| 802 | di.acl_pkts = hdev->acl_pkts; |
| 803 | di.sco_mtu = hdev->sco_mtu; |
| 804 | di.sco_pkts = hdev->sco_pkts; |
| 805 | di.link_policy = hdev->link_policy; |
| 806 | di.link_mode = hdev->link_mode; |
| 807 | |
| 808 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); |
| 809 | memcpy(&di.features, &hdev->features, sizeof(di.features)); |
| 810 | |
| 811 | if (copy_to_user(arg, &di, sizeof(di))) |
| 812 | err = -EFAULT; |
| 813 | |
| 814 | hci_dev_put(hdev); |
| 815 | |
| 816 | return err; |
| 817 | } |
| 818 | |
| 819 | /* ---- Interface to HCI drivers ---- */ |
| 820 | |
| 821 | /* Alloc HCI device */ |
| 822 | struct hci_dev *hci_alloc_dev(void) |
| 823 | { |
| 824 | struct hci_dev *hdev; |
| 825 | |
Marcel Holtmann | 25ea6db | 2006-07-06 15:40:09 +0200 | [diff] [blame] | 826 | hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | if (!hdev) |
| 828 | return NULL; |
| 829 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | skb_queue_head_init(&hdev->driver_init); |
| 831 | |
| 832 | return hdev; |
| 833 | } |
| 834 | EXPORT_SYMBOL(hci_alloc_dev); |
| 835 | |
| 836 | /* Free HCI device */ |
| 837 | void hci_free_dev(struct hci_dev *hdev) |
| 838 | { |
| 839 | skb_queue_purge(&hdev->driver_init); |
| 840 | |
Marcel Holtmann | a91f2e3 | 2006-07-03 10:02:41 +0200 | [diff] [blame] | 841 | /* will free via device release */ |
| 842 | put_device(&hdev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 843 | } |
| 844 | EXPORT_SYMBOL(hci_free_dev); |
| 845 | |
| 846 | /* Register HCI device */ |
| 847 | int hci_register_dev(struct hci_dev *hdev) |
| 848 | { |
| 849 | struct list_head *head = &hci_dev_list, *p; |
Marcel Holtmann | ef22201 | 2007-07-11 06:42:04 +0200 | [diff] [blame] | 850 | int i, id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 851 | |
| 852 | BT_DBG("%p name %s type %d owner %p", hdev, hdev->name, hdev->type, hdev->owner); |
| 853 | |
| 854 | if (!hdev->open || !hdev->close || !hdev->destruct) |
| 855 | return -EINVAL; |
| 856 | |
| 857 | write_lock_bh(&hci_dev_list_lock); |
| 858 | |
| 859 | /* Find first available device id */ |
| 860 | list_for_each(p, &hci_dev_list) { |
| 861 | if (list_entry(p, struct hci_dev, list)->id != id) |
| 862 | break; |
| 863 | head = p; id++; |
| 864 | } |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 865 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | sprintf(hdev->name, "hci%d", id); |
| 867 | hdev->id = id; |
| 868 | list_add(&hdev->list, head); |
| 869 | |
| 870 | atomic_set(&hdev->refcnt, 1); |
| 871 | spin_lock_init(&hdev->lock); |
| 872 | |
| 873 | hdev->flags = 0; |
| 874 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); |
Marcel Holtmann | 5b7f990 | 2007-07-11 09:51:55 +0200 | [diff] [blame] | 875 | hdev->esco_type = (ESCO_HV1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | hdev->link_mode = (HCI_LM_ACCEPT); |
| 877 | |
Marcel Holtmann | 04837f6 | 2006-07-03 10:02:33 +0200 | [diff] [blame] | 878 | hdev->idle_timeout = 0; |
| 879 | hdev->sniff_max_interval = 800; |
| 880 | hdev->sniff_min_interval = 80; |
| 881 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | tasklet_init(&hdev->cmd_task, hci_cmd_task,(unsigned long) hdev); |
| 883 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); |
| 884 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); |
| 885 | |
| 886 | skb_queue_head_init(&hdev->rx_q); |
| 887 | skb_queue_head_init(&hdev->cmd_q); |
| 888 | skb_queue_head_init(&hdev->raw_q); |
| 889 | |
Marcel Holtmann | ef22201 | 2007-07-11 06:42:04 +0200 | [diff] [blame] | 890 | for (i = 0; i < 3; i++) |
| 891 | hdev->reassembly[i] = NULL; |
| 892 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | init_waitqueue_head(&hdev->req_wait_q); |
| 894 | init_MUTEX(&hdev->req_lock); |
| 895 | |
| 896 | inquiry_cache_init(hdev); |
| 897 | |
| 898 | hci_conn_hash_init(hdev); |
| 899 | |
| 900 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
| 901 | |
| 902 | atomic_set(&hdev->promisc, 0); |
| 903 | |
| 904 | write_unlock_bh(&hci_dev_list_lock); |
| 905 | |
| 906 | hci_register_sysfs(hdev); |
| 907 | |
| 908 | hci_notify(hdev, HCI_DEV_REG); |
| 909 | |
| 910 | return id; |
| 911 | } |
| 912 | EXPORT_SYMBOL(hci_register_dev); |
| 913 | |
| 914 | /* Unregister HCI device */ |
| 915 | int hci_unregister_dev(struct hci_dev *hdev) |
| 916 | { |
Marcel Holtmann | ef22201 | 2007-07-11 06:42:04 +0200 | [diff] [blame] | 917 | int i; |
| 918 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type); |
| 920 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | write_lock_bh(&hci_dev_list_lock); |
| 922 | list_del(&hdev->list); |
| 923 | write_unlock_bh(&hci_dev_list_lock); |
| 924 | |
| 925 | hci_dev_do_close(hdev); |
| 926 | |
Marcel Holtmann | ef22201 | 2007-07-11 06:42:04 +0200 | [diff] [blame] | 927 | for (i = 0; i < 3; i++) |
| 928 | kfree_skb(hdev->reassembly[i]); |
| 929 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | hci_notify(hdev, HCI_DEV_UNREG); |
| 931 | |
Dave Young | 147e2d5 | 2008-03-05 18:45:59 -0800 | [diff] [blame] | 932 | hci_unregister_sysfs(hdev); |
| 933 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | __hci_dev_put(hdev); |
Marcel Holtmann | ef22201 | 2007-07-11 06:42:04 +0200 | [diff] [blame] | 935 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | return 0; |
| 937 | } |
| 938 | EXPORT_SYMBOL(hci_unregister_dev); |
| 939 | |
| 940 | /* Suspend HCI device */ |
| 941 | int hci_suspend_dev(struct hci_dev *hdev) |
| 942 | { |
| 943 | hci_notify(hdev, HCI_DEV_SUSPEND); |
| 944 | return 0; |
| 945 | } |
| 946 | EXPORT_SYMBOL(hci_suspend_dev); |
| 947 | |
| 948 | /* Resume HCI device */ |
| 949 | int hci_resume_dev(struct hci_dev *hdev) |
| 950 | { |
| 951 | hci_notify(hdev, HCI_DEV_RESUME); |
| 952 | return 0; |
| 953 | } |
| 954 | EXPORT_SYMBOL(hci_resume_dev); |
| 955 | |
Marcel Holtmann | ef22201 | 2007-07-11 06:42:04 +0200 | [diff] [blame] | 956 | /* Receive packet type fragment */ |
| 957 | #define __reassembly(hdev, type) ((hdev)->reassembly[(type) - 2]) |
| 958 | |
| 959 | int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count) |
| 960 | { |
| 961 | if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) |
| 962 | return -EILSEQ; |
| 963 | |
| 964 | while (count) { |
| 965 | struct sk_buff *skb = __reassembly(hdev, type); |
| 966 | struct { int expect; } *scb; |
| 967 | int len = 0; |
| 968 | |
| 969 | if (!skb) { |
| 970 | /* Start of the frame */ |
| 971 | |
| 972 | switch (type) { |
| 973 | case HCI_EVENT_PKT: |
| 974 | if (count >= HCI_EVENT_HDR_SIZE) { |
| 975 | struct hci_event_hdr *h = data; |
| 976 | len = HCI_EVENT_HDR_SIZE + h->plen; |
| 977 | } else |
| 978 | return -EILSEQ; |
| 979 | break; |
| 980 | |
| 981 | case HCI_ACLDATA_PKT: |
| 982 | if (count >= HCI_ACL_HDR_SIZE) { |
| 983 | struct hci_acl_hdr *h = data; |
| 984 | len = HCI_ACL_HDR_SIZE + __le16_to_cpu(h->dlen); |
| 985 | } else |
| 986 | return -EILSEQ; |
| 987 | break; |
| 988 | |
| 989 | case HCI_SCODATA_PKT: |
| 990 | if (count >= HCI_SCO_HDR_SIZE) { |
| 991 | struct hci_sco_hdr *h = data; |
| 992 | len = HCI_SCO_HDR_SIZE + h->dlen; |
| 993 | } else |
| 994 | return -EILSEQ; |
| 995 | break; |
| 996 | } |
| 997 | |
| 998 | skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 999 | if (!skb) { |
| 1000 | BT_ERR("%s no memory for packet", hdev->name); |
| 1001 | return -ENOMEM; |
| 1002 | } |
| 1003 | |
| 1004 | skb->dev = (void *) hdev; |
| 1005 | bt_cb(skb)->pkt_type = type; |
YOSHIFUJI Hideaki | 00ae02f | 2007-07-19 10:43:16 +0900 | [diff] [blame] | 1006 | |
Marcel Holtmann | ef22201 | 2007-07-11 06:42:04 +0200 | [diff] [blame] | 1007 | __reassembly(hdev, type) = skb; |
| 1008 | |
| 1009 | scb = (void *) skb->cb; |
| 1010 | scb->expect = len; |
| 1011 | } else { |
| 1012 | /* Continuation */ |
| 1013 | |
| 1014 | scb = (void *) skb->cb; |
| 1015 | len = scb->expect; |
| 1016 | } |
| 1017 | |
| 1018 | len = min(len, count); |
| 1019 | |
| 1020 | memcpy(skb_put(skb, len), data, len); |
| 1021 | |
| 1022 | scb->expect -= len; |
| 1023 | |
| 1024 | if (scb->expect == 0) { |
| 1025 | /* Complete frame */ |
| 1026 | |
| 1027 | __reassembly(hdev, type) = NULL; |
| 1028 | |
| 1029 | bt_cb(skb)->pkt_type = type; |
| 1030 | hci_recv_frame(skb); |
| 1031 | } |
| 1032 | |
| 1033 | count -= len; data += len; |
| 1034 | } |
| 1035 | |
| 1036 | return 0; |
| 1037 | } |
| 1038 | EXPORT_SYMBOL(hci_recv_fragment); |
| 1039 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1040 | /* ---- Interface to upper protocols ---- */ |
| 1041 | |
| 1042 | /* Register/Unregister protocols. |
| 1043 | * hci_task_lock is used to ensure that no tasks are running. */ |
| 1044 | int hci_register_proto(struct hci_proto *hp) |
| 1045 | { |
| 1046 | int err = 0; |
| 1047 | |
| 1048 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); |
| 1049 | |
| 1050 | if (hp->id >= HCI_MAX_PROTO) |
| 1051 | return -EINVAL; |
| 1052 | |
| 1053 | write_lock_bh(&hci_task_lock); |
| 1054 | |
| 1055 | if (!hci_proto[hp->id]) |
| 1056 | hci_proto[hp->id] = hp; |
| 1057 | else |
| 1058 | err = -EEXIST; |
| 1059 | |
| 1060 | write_unlock_bh(&hci_task_lock); |
| 1061 | |
| 1062 | return err; |
| 1063 | } |
| 1064 | EXPORT_SYMBOL(hci_register_proto); |
| 1065 | |
| 1066 | int hci_unregister_proto(struct hci_proto *hp) |
| 1067 | { |
| 1068 | int err = 0; |
| 1069 | |
| 1070 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); |
| 1071 | |
| 1072 | if (hp->id >= HCI_MAX_PROTO) |
| 1073 | return -EINVAL; |
| 1074 | |
| 1075 | write_lock_bh(&hci_task_lock); |
| 1076 | |
| 1077 | if (hci_proto[hp->id]) |
| 1078 | hci_proto[hp->id] = NULL; |
| 1079 | else |
| 1080 | err = -ENOENT; |
| 1081 | |
| 1082 | write_unlock_bh(&hci_task_lock); |
| 1083 | |
| 1084 | return err; |
| 1085 | } |
| 1086 | EXPORT_SYMBOL(hci_unregister_proto); |
| 1087 | |
| 1088 | int hci_register_cb(struct hci_cb *cb) |
| 1089 | { |
| 1090 | BT_DBG("%p name %s", cb, cb->name); |
| 1091 | |
| 1092 | write_lock_bh(&hci_cb_list_lock); |
| 1093 | list_add(&cb->list, &hci_cb_list); |
| 1094 | write_unlock_bh(&hci_cb_list_lock); |
| 1095 | |
| 1096 | return 0; |
| 1097 | } |
| 1098 | EXPORT_SYMBOL(hci_register_cb); |
| 1099 | |
| 1100 | int hci_unregister_cb(struct hci_cb *cb) |
| 1101 | { |
| 1102 | BT_DBG("%p name %s", cb, cb->name); |
| 1103 | |
| 1104 | write_lock_bh(&hci_cb_list_lock); |
| 1105 | list_del(&cb->list); |
| 1106 | write_unlock_bh(&hci_cb_list_lock); |
| 1107 | |
| 1108 | return 0; |
| 1109 | } |
| 1110 | EXPORT_SYMBOL(hci_unregister_cb); |
| 1111 | |
| 1112 | static int hci_send_frame(struct sk_buff *skb) |
| 1113 | { |
| 1114 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; |
| 1115 | |
| 1116 | if (!hdev) { |
| 1117 | kfree_skb(skb); |
| 1118 | return -ENODEV; |
| 1119 | } |
| 1120 | |
Marcel Holtmann | 0d48d93 | 2005-08-09 20:30:28 -0700 | [diff] [blame] | 1121 | BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | |
| 1123 | if (atomic_read(&hdev->promisc)) { |
| 1124 | /* Time stamp */ |
Patrick McHardy | a61bbcf | 2005-08-14 17:24:31 -0700 | [diff] [blame] | 1125 | __net_timestamp(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | |
| 1127 | hci_send_to_sock(hdev, skb); |
| 1128 | } |
| 1129 | |
| 1130 | /* Get rid of skb owner, prior to sending to the driver. */ |
| 1131 | skb_orphan(skb); |
| 1132 | |
| 1133 | return hdev->send(skb); |
| 1134 | } |
| 1135 | |
| 1136 | /* Send HCI command */ |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 1137 | int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | { |
| 1139 | int len = HCI_COMMAND_HDR_SIZE + plen; |
| 1140 | struct hci_command_hdr *hdr; |
| 1141 | struct sk_buff *skb; |
| 1142 | |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 1143 | BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | |
| 1145 | skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 1146 | if (!skb) { |
Marcel Holtmann | ef22201 | 2007-07-11 06:42:04 +0200 | [diff] [blame] | 1147 | BT_ERR("%s no memory for command", hdev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | return -ENOMEM; |
| 1149 | } |
| 1150 | |
| 1151 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 1152 | hdr->opcode = cpu_to_le16(opcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1153 | hdr->plen = plen; |
| 1154 | |
| 1155 | if (plen) |
| 1156 | memcpy(skb_put(skb, plen), param, plen); |
| 1157 | |
| 1158 | BT_DBG("skb len %d", skb->len); |
| 1159 | |
Marcel Holtmann | 0d48d93 | 2005-08-09 20:30:28 -0700 | [diff] [blame] | 1160 | bt_cb(skb)->pkt_type = HCI_COMMAND_PKT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1161 | skb->dev = (void *) hdev; |
| 1162 | skb_queue_tail(&hdev->cmd_q, skb); |
| 1163 | hci_sched_cmd(hdev); |
| 1164 | |
| 1165 | return 0; |
| 1166 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | |
| 1168 | /* Get data from the previously sent command */ |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 1169 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | { |
| 1171 | struct hci_command_hdr *hdr; |
| 1172 | |
| 1173 | if (!hdev->sent_cmd) |
| 1174 | return NULL; |
| 1175 | |
| 1176 | hdr = (void *) hdev->sent_cmd->data; |
| 1177 | |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 1178 | if (hdr->opcode != cpu_to_le16(opcode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | return NULL; |
| 1180 | |
Marcel Holtmann | a9de924 | 2007-10-20 13:33:56 +0200 | [diff] [blame] | 1181 | BT_DBG("%s opcode 0x%x", hdev->name, opcode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | |
| 1183 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; |
| 1184 | } |
| 1185 | |
| 1186 | /* Send ACL data */ |
| 1187 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) |
| 1188 | { |
| 1189 | struct hci_acl_hdr *hdr; |
| 1190 | int len = skb->len; |
| 1191 | |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 1192 | skb_push(skb, HCI_ACL_HDR_SIZE); |
| 1193 | skb_reset_transport_header(skb); |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1194 | hdr = (struct hci_acl_hdr *)skb_transport_header(skb); |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1195 | hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags)); |
| 1196 | hdr->dlen = cpu_to_le16(len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1197 | } |
| 1198 | |
| 1199 | int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) |
| 1200 | { |
| 1201 | struct hci_dev *hdev = conn->hdev; |
| 1202 | struct sk_buff *list; |
| 1203 | |
| 1204 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); |
| 1205 | |
| 1206 | skb->dev = (void *) hdev; |
Marcel Holtmann | 0d48d93 | 2005-08-09 20:30:28 -0700 | [diff] [blame] | 1207 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1208 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_START); |
| 1209 | |
| 1210 | if (!(list = skb_shinfo(skb)->frag_list)) { |
| 1211 | /* Non fragmented */ |
| 1212 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); |
| 1213 | |
| 1214 | skb_queue_tail(&conn->data_q, skb); |
| 1215 | } else { |
| 1216 | /* Fragmented */ |
| 1217 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
| 1218 | |
| 1219 | skb_shinfo(skb)->frag_list = NULL; |
| 1220 | |
| 1221 | /* Queue all fragments atomically */ |
| 1222 | spin_lock_bh(&conn->data_q.lock); |
| 1223 | |
| 1224 | __skb_queue_tail(&conn->data_q, skb); |
| 1225 | do { |
| 1226 | skb = list; list = list->next; |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1227 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1228 | skb->dev = (void *) hdev; |
Marcel Holtmann | 0d48d93 | 2005-08-09 20:30:28 -0700 | [diff] [blame] | 1229 | bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1230 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT); |
| 1231 | |
| 1232 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
| 1233 | |
| 1234 | __skb_queue_tail(&conn->data_q, skb); |
| 1235 | } while (list); |
| 1236 | |
| 1237 | spin_unlock_bh(&conn->data_q.lock); |
| 1238 | } |
| 1239 | |
| 1240 | hci_sched_tx(hdev); |
| 1241 | return 0; |
| 1242 | } |
| 1243 | EXPORT_SYMBOL(hci_send_acl); |
| 1244 | |
| 1245 | /* Send SCO data */ |
| 1246 | int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
| 1247 | { |
| 1248 | struct hci_dev *hdev = conn->hdev; |
| 1249 | struct hci_sco_hdr hdr; |
| 1250 | |
| 1251 | BT_DBG("%s len %d", hdev->name, skb->len); |
| 1252 | |
| 1253 | if (skb->len > hdev->sco_mtu) { |
| 1254 | kfree_skb(skb); |
| 1255 | return -EINVAL; |
| 1256 | } |
| 1257 | |
YOSHIFUJI Hideaki | aca3192 | 2007-03-25 20:12:50 -0700 | [diff] [blame] | 1258 | hdr.handle = cpu_to_le16(conn->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1259 | hdr.dlen = skb->len; |
| 1260 | |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 1261 | skb_push(skb, HCI_SCO_HDR_SIZE); |
| 1262 | skb_reset_transport_header(skb); |
Arnaldo Carvalho de Melo | 9c70220 | 2007-04-25 18:04:18 -0700 | [diff] [blame] | 1263 | memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | |
| 1265 | skb->dev = (void *) hdev; |
Marcel Holtmann | 0d48d93 | 2005-08-09 20:30:28 -0700 | [diff] [blame] | 1266 | bt_cb(skb)->pkt_type = HCI_SCODATA_PKT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | skb_queue_tail(&conn->data_q, skb); |
| 1268 | hci_sched_tx(hdev); |
| 1269 | return 0; |
| 1270 | } |
| 1271 | EXPORT_SYMBOL(hci_send_sco); |
| 1272 | |
| 1273 | /* ---- HCI TX task (outgoing data) ---- */ |
| 1274 | |
| 1275 | /* HCI Connection scheduler */ |
| 1276 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) |
| 1277 | { |
| 1278 | struct hci_conn_hash *h = &hdev->conn_hash; |
Marcel Holtmann | 5b7f990 | 2007-07-11 09:51:55 +0200 | [diff] [blame] | 1279 | struct hci_conn *conn = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | int num = 0, min = ~0; |
| 1281 | struct list_head *p; |
| 1282 | |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1283 | /* We don't have to lock device here. Connections are always |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | * added and removed with TX task disabled. */ |
| 1285 | list_for_each(p, &h->list) { |
| 1286 | struct hci_conn *c; |
| 1287 | c = list_entry(p, struct hci_conn, list); |
| 1288 | |
Marcel Holtmann | 769be97 | 2008-07-14 20:13:49 +0200 | [diff] [blame] | 1289 | if (c->type != type || skb_queue_empty(&c->data_q)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | continue; |
Marcel Holtmann | 769be97 | 2008-07-14 20:13:49 +0200 | [diff] [blame] | 1291 | |
| 1292 | if (c->state != BT_CONNECTED && c->state != BT_CONFIG) |
| 1293 | continue; |
| 1294 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | num++; |
| 1296 | |
| 1297 | if (c->sent < min) { |
| 1298 | min = c->sent; |
| 1299 | conn = c; |
| 1300 | } |
| 1301 | } |
| 1302 | |
| 1303 | if (conn) { |
| 1304 | int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt); |
| 1305 | int q = cnt / num; |
| 1306 | *quote = q ? q : 1; |
| 1307 | } else |
| 1308 | *quote = 0; |
| 1309 | |
| 1310 | BT_DBG("conn %p quote %d", conn, *quote); |
| 1311 | return conn; |
| 1312 | } |
| 1313 | |
| 1314 | static inline void hci_acl_tx_to(struct hci_dev *hdev) |
| 1315 | { |
| 1316 | struct hci_conn_hash *h = &hdev->conn_hash; |
| 1317 | struct list_head *p; |
| 1318 | struct hci_conn *c; |
| 1319 | |
| 1320 | BT_ERR("%s ACL tx timeout", hdev->name); |
| 1321 | |
| 1322 | /* Kill stalled connections */ |
| 1323 | list_for_each(p, &h->list) { |
| 1324 | c = list_entry(p, struct hci_conn, list); |
| 1325 | if (c->type == ACL_LINK && c->sent) { |
| 1326 | BT_ERR("%s killing stalled ACL connection %s", |
| 1327 | hdev->name, batostr(&c->dst)); |
| 1328 | hci_acl_disconn(c, 0x13); |
| 1329 | } |
| 1330 | } |
| 1331 | } |
| 1332 | |
| 1333 | static inline void hci_sched_acl(struct hci_dev *hdev) |
| 1334 | { |
| 1335 | struct hci_conn *conn; |
| 1336 | struct sk_buff *skb; |
| 1337 | int quote; |
| 1338 | |
| 1339 | BT_DBG("%s", hdev->name); |
| 1340 | |
| 1341 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
| 1342 | /* ACL tx timeout must be longer than maximum |
| 1343 | * link supervision timeout (40.9 seconds) */ |
S.Çağlar Onur | 8245302 | 2008-02-17 23:25:57 -0800 | [diff] [blame] | 1344 | if (!hdev->acl_cnt && time_after(jiffies, hdev->acl_last_tx + HZ * 45)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | hci_acl_tx_to(hdev); |
| 1346 | } |
| 1347 | |
| 1348 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { |
| 1349 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { |
| 1350 | BT_DBG("skb %p len %d", skb, skb->len); |
Marcel Holtmann | 04837f6 | 2006-07-03 10:02:33 +0200 | [diff] [blame] | 1351 | |
| 1352 | hci_conn_enter_active_mode(conn); |
| 1353 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1354 | hci_send_frame(skb); |
| 1355 | hdev->acl_last_tx = jiffies; |
| 1356 | |
| 1357 | hdev->acl_cnt--; |
| 1358 | conn->sent++; |
| 1359 | } |
| 1360 | } |
| 1361 | } |
| 1362 | |
| 1363 | /* Schedule SCO */ |
| 1364 | static inline void hci_sched_sco(struct hci_dev *hdev) |
| 1365 | { |
| 1366 | struct hci_conn *conn; |
| 1367 | struct sk_buff *skb; |
| 1368 | int quote; |
| 1369 | |
| 1370 | BT_DBG("%s", hdev->name); |
| 1371 | |
| 1372 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { |
| 1373 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { |
| 1374 | BT_DBG("skb %p len %d", skb, skb->len); |
| 1375 | hci_send_frame(skb); |
| 1376 | |
| 1377 | conn->sent++; |
| 1378 | if (conn->sent == ~0) |
| 1379 | conn->sent = 0; |
| 1380 | } |
| 1381 | } |
| 1382 | } |
| 1383 | |
Marcel Holtmann | b6a0dc8 | 2007-10-20 14:55:10 +0200 | [diff] [blame] | 1384 | static inline void hci_sched_esco(struct hci_dev *hdev) |
| 1385 | { |
| 1386 | struct hci_conn *conn; |
| 1387 | struct sk_buff *skb; |
| 1388 | int quote; |
| 1389 | |
| 1390 | BT_DBG("%s", hdev->name); |
| 1391 | |
| 1392 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, "e))) { |
| 1393 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { |
| 1394 | BT_DBG("skb %p len %d", skb, skb->len); |
| 1395 | hci_send_frame(skb); |
| 1396 | |
| 1397 | conn->sent++; |
| 1398 | if (conn->sent == ~0) |
| 1399 | conn->sent = 0; |
| 1400 | } |
| 1401 | } |
| 1402 | } |
| 1403 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | static void hci_tx_task(unsigned long arg) |
| 1405 | { |
| 1406 | struct hci_dev *hdev = (struct hci_dev *) arg; |
| 1407 | struct sk_buff *skb; |
| 1408 | |
| 1409 | read_lock(&hci_task_lock); |
| 1410 | |
| 1411 | BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt); |
| 1412 | |
| 1413 | /* Schedule queues and send stuff to HCI driver */ |
| 1414 | |
| 1415 | hci_sched_acl(hdev); |
| 1416 | |
| 1417 | hci_sched_sco(hdev); |
| 1418 | |
Marcel Holtmann | b6a0dc8 | 2007-10-20 14:55:10 +0200 | [diff] [blame] | 1419 | hci_sched_esco(hdev); |
| 1420 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1421 | /* Send next queued raw (unknown type) packet */ |
| 1422 | while ((skb = skb_dequeue(&hdev->raw_q))) |
| 1423 | hci_send_frame(skb); |
| 1424 | |
| 1425 | read_unlock(&hci_task_lock); |
| 1426 | } |
| 1427 | |
| 1428 | /* ----- HCI RX task (incoming data proccessing) ----- */ |
| 1429 | |
| 1430 | /* ACL data packet */ |
| 1431 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
| 1432 | { |
| 1433 | struct hci_acl_hdr *hdr = (void *) skb->data; |
| 1434 | struct hci_conn *conn; |
| 1435 | __u16 handle, flags; |
| 1436 | |
| 1437 | skb_pull(skb, HCI_ACL_HDR_SIZE); |
| 1438 | |
| 1439 | handle = __le16_to_cpu(hdr->handle); |
| 1440 | flags = hci_flags(handle); |
| 1441 | handle = hci_handle(handle); |
| 1442 | |
| 1443 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); |
| 1444 | |
| 1445 | hdev->stat.acl_rx++; |
| 1446 | |
| 1447 | hci_dev_lock(hdev); |
| 1448 | conn = hci_conn_hash_lookup_handle(hdev, handle); |
| 1449 | hci_dev_unlock(hdev); |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1451 | if (conn) { |
| 1452 | register struct hci_proto *hp; |
| 1453 | |
Marcel Holtmann | 04837f6 | 2006-07-03 10:02:33 +0200 | [diff] [blame] | 1454 | hci_conn_enter_active_mode(conn); |
| 1455 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | /* Send to upper protocol */ |
| 1457 | if ((hp = hci_proto[HCI_PROTO_L2CAP]) && hp->recv_acldata) { |
| 1458 | hp->recv_acldata(conn, skb, flags); |
| 1459 | return; |
| 1460 | } |
| 1461 | } else { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1462 | BT_ERR("%s ACL packet for unknown connection handle %d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | hdev->name, handle); |
| 1464 | } |
| 1465 | |
| 1466 | kfree_skb(skb); |
| 1467 | } |
| 1468 | |
| 1469 | /* SCO data packet */ |
| 1470 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
| 1471 | { |
| 1472 | struct hci_sco_hdr *hdr = (void *) skb->data; |
| 1473 | struct hci_conn *conn; |
| 1474 | __u16 handle; |
| 1475 | |
| 1476 | skb_pull(skb, HCI_SCO_HDR_SIZE); |
| 1477 | |
| 1478 | handle = __le16_to_cpu(hdr->handle); |
| 1479 | |
| 1480 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); |
| 1481 | |
| 1482 | hdev->stat.sco_rx++; |
| 1483 | |
| 1484 | hci_dev_lock(hdev); |
| 1485 | conn = hci_conn_hash_lookup_handle(hdev, handle); |
| 1486 | hci_dev_unlock(hdev); |
| 1487 | |
| 1488 | if (conn) { |
| 1489 | register struct hci_proto *hp; |
| 1490 | |
| 1491 | /* Send to upper protocol */ |
| 1492 | if ((hp = hci_proto[HCI_PROTO_SCO]) && hp->recv_scodata) { |
| 1493 | hp->recv_scodata(conn, skb); |
| 1494 | return; |
| 1495 | } |
| 1496 | } else { |
YOSHIFUJI Hideaki | 8e87d14 | 2007-02-09 23:24:33 +0900 | [diff] [blame] | 1497 | BT_ERR("%s SCO packet for unknown connection handle %d", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | hdev->name, handle); |
| 1499 | } |
| 1500 | |
| 1501 | kfree_skb(skb); |
| 1502 | } |
| 1503 | |
Marcel Holtmann | 6516455 | 2005-10-28 19:20:48 +0200 | [diff] [blame] | 1504 | static void hci_rx_task(unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | { |
| 1506 | struct hci_dev *hdev = (struct hci_dev *) arg; |
| 1507 | struct sk_buff *skb; |
| 1508 | |
| 1509 | BT_DBG("%s", hdev->name); |
| 1510 | |
| 1511 | read_lock(&hci_task_lock); |
| 1512 | |
| 1513 | while ((skb = skb_dequeue(&hdev->rx_q))) { |
| 1514 | if (atomic_read(&hdev->promisc)) { |
| 1515 | /* Send copy to the sockets */ |
| 1516 | hci_send_to_sock(hdev, skb); |
| 1517 | } |
| 1518 | |
| 1519 | if (test_bit(HCI_RAW, &hdev->flags)) { |
| 1520 | kfree_skb(skb); |
| 1521 | continue; |
| 1522 | } |
| 1523 | |
| 1524 | if (test_bit(HCI_INIT, &hdev->flags)) { |
| 1525 | /* Don't process data packets in this states. */ |
Marcel Holtmann | 0d48d93 | 2005-08-09 20:30:28 -0700 | [diff] [blame] | 1526 | switch (bt_cb(skb)->pkt_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | case HCI_ACLDATA_PKT: |
| 1528 | case HCI_SCODATA_PKT: |
| 1529 | kfree_skb(skb); |
| 1530 | continue; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1531 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1532 | } |
| 1533 | |
| 1534 | /* Process frame */ |
Marcel Holtmann | 0d48d93 | 2005-08-09 20:30:28 -0700 | [diff] [blame] | 1535 | switch (bt_cb(skb)->pkt_type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1536 | case HCI_EVENT_PKT: |
| 1537 | hci_event_packet(hdev, skb); |
| 1538 | break; |
| 1539 | |
| 1540 | case HCI_ACLDATA_PKT: |
| 1541 | BT_DBG("%s ACL data packet", hdev->name); |
| 1542 | hci_acldata_packet(hdev, skb); |
| 1543 | break; |
| 1544 | |
| 1545 | case HCI_SCODATA_PKT: |
| 1546 | BT_DBG("%s SCO data packet", hdev->name); |
| 1547 | hci_scodata_packet(hdev, skb); |
| 1548 | break; |
| 1549 | |
| 1550 | default: |
| 1551 | kfree_skb(skb); |
| 1552 | break; |
| 1553 | } |
| 1554 | } |
| 1555 | |
| 1556 | read_unlock(&hci_task_lock); |
| 1557 | } |
| 1558 | |
| 1559 | static void hci_cmd_task(unsigned long arg) |
| 1560 | { |
| 1561 | struct hci_dev *hdev = (struct hci_dev *) arg; |
| 1562 | struct sk_buff *skb; |
| 1563 | |
| 1564 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); |
| 1565 | |
S.Çağlar Onur | 8245302 | 2008-02-17 23:25:57 -0800 | [diff] [blame] | 1566 | if (!atomic_read(&hdev->cmd_cnt) && time_after(jiffies, hdev->cmd_last_tx + HZ)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | BT_ERR("%s command tx timeout", hdev->name); |
| 1568 | atomic_set(&hdev->cmd_cnt, 1); |
| 1569 | } |
| 1570 | |
| 1571 | /* Send queued commands */ |
| 1572 | if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) { |
| 1573 | if (hdev->sent_cmd) |
| 1574 | kfree_skb(hdev->sent_cmd); |
| 1575 | |
| 1576 | if ((hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC))) { |
| 1577 | atomic_dec(&hdev->cmd_cnt); |
| 1578 | hci_send_frame(skb); |
| 1579 | hdev->cmd_last_tx = jiffies; |
| 1580 | } else { |
| 1581 | skb_queue_head(&hdev->cmd_q, skb); |
| 1582 | hci_sched_cmd(hdev); |
| 1583 | } |
| 1584 | } |
| 1585 | } |