Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 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 |
| 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 |
| 18 | OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 19 | |
| 20 | ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS, |
| 21 | COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS |
| 22 | SOFTWARE IS DISCLAIMED. |
| 23 | */ |
| 24 | |
| 25 | /* Bluetooth HCI core. */ |
| 26 | |
| 27 | #include <linux/config.h> |
| 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 */ |
| 76 | static struct notifier_block *hci_notifier; |
| 77 | |
| 78 | /* ---- HCI notifications ---- */ |
| 79 | |
| 80 | int hci_register_notifier(struct notifier_block *nb) |
| 81 | { |
| 82 | return notifier_chain_register(&hci_notifier, nb); |
| 83 | } |
| 84 | |
| 85 | int hci_unregister_notifier(struct notifier_block *nb) |
| 86 | { |
| 87 | return notifier_chain_unregister(&hci_notifier, nb); |
| 88 | } |
| 89 | |
| 90 | void hci_notify(struct hci_dev *hdev, int event) |
| 91 | { |
| 92 | notifier_call_chain(&hci_notifier, event, hdev); |
| 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. */ |
| 120 | static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt), |
| 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; |
| 153 | }; |
| 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 | |
| 167 | /* Serialize all requests */ |
| 168 | hci_req_lock(hdev); |
| 169 | ret = __hci_request(hdev, req, opt, timeout); |
| 170 | hci_req_unlock(hdev); |
| 171 | |
| 172 | return ret; |
| 173 | } |
| 174 | |
| 175 | static void hci_reset_req(struct hci_dev *hdev, unsigned long opt) |
| 176 | { |
| 177 | BT_DBG("%s %ld", hdev->name, opt); |
| 178 | |
| 179 | /* Reset device */ |
| 180 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_RESET, 0, NULL); |
| 181 | } |
| 182 | |
| 183 | static void hci_init_req(struct hci_dev *hdev, unsigned long opt) |
| 184 | { |
| 185 | struct sk_buff *skb; |
| 186 | __u16 param; |
| 187 | |
| 188 | BT_DBG("%s %ld", hdev->name, opt); |
| 189 | |
| 190 | /* Driver initialization */ |
| 191 | |
| 192 | /* Special commands */ |
| 193 | while ((skb = skb_dequeue(&hdev->driver_init))) { |
| 194 | skb->pkt_type = HCI_COMMAND_PKT; |
| 195 | skb->dev = (void *) hdev; |
| 196 | skb_queue_tail(&hdev->cmd_q, skb); |
| 197 | hci_sched_cmd(hdev); |
| 198 | } |
| 199 | skb_queue_purge(&hdev->driver_init); |
| 200 | |
| 201 | /* Mandatory initialization */ |
| 202 | |
| 203 | /* Reset */ |
| 204 | if (test_bit(HCI_QUIRK_RESET_ON_INIT, &hdev->quirks)) |
| 205 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_RESET, 0, NULL); |
| 206 | |
| 207 | /* Read Local Supported Features */ |
| 208 | hci_send_cmd(hdev, OGF_INFO_PARAM, OCF_READ_LOCAL_FEATURES, 0, NULL); |
| 209 | |
| 210 | /* Read Buffer Size (ACL mtu, max pkt, etc.) */ |
| 211 | hci_send_cmd(hdev, OGF_INFO_PARAM, OCF_READ_BUFFER_SIZE, 0, NULL); |
| 212 | |
| 213 | #if 0 |
| 214 | /* Host buffer size */ |
| 215 | { |
| 216 | struct hci_cp_host_buffer_size cp; |
| 217 | cp.acl_mtu = __cpu_to_le16(HCI_MAX_ACL_SIZE); |
| 218 | cp.sco_mtu = HCI_MAX_SCO_SIZE; |
| 219 | cp.acl_max_pkt = __cpu_to_le16(0xffff); |
| 220 | cp.sco_max_pkt = __cpu_to_le16(0xffff); |
| 221 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_HOST_BUFFER_SIZE, sizeof(cp), &cp); |
| 222 | } |
| 223 | #endif |
| 224 | |
| 225 | /* Read BD Address */ |
| 226 | hci_send_cmd(hdev, OGF_INFO_PARAM, OCF_READ_BD_ADDR, 0, NULL); |
| 227 | |
| 228 | /* Read Voice Setting */ |
| 229 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_READ_VOICE_SETTING, 0, NULL); |
| 230 | |
| 231 | /* Optional initialization */ |
| 232 | |
| 233 | /* Clear Event Filters */ |
| 234 | { |
| 235 | struct hci_cp_set_event_flt cp; |
| 236 | cp.flt_type = HCI_FLT_CLEAR_ALL; |
| 237 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_SET_EVENT_FLT, sizeof(cp), &cp); |
| 238 | } |
| 239 | |
| 240 | /* Page timeout ~20 secs */ |
| 241 | param = __cpu_to_le16(0x8000); |
| 242 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_PG_TIMEOUT, 2, ¶m); |
| 243 | |
| 244 | /* Connection accept timeout ~20 secs */ |
| 245 | param = __cpu_to_le16(0x7d00); |
| 246 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_CA_TIMEOUT, 2, ¶m); |
| 247 | } |
| 248 | |
| 249 | static void hci_scan_req(struct hci_dev *hdev, unsigned long opt) |
| 250 | { |
| 251 | __u8 scan = opt; |
| 252 | |
| 253 | BT_DBG("%s %x", hdev->name, scan); |
| 254 | |
| 255 | /* Inquiry and Page scans */ |
| 256 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_SCAN_ENABLE, 1, &scan); |
| 257 | } |
| 258 | |
| 259 | static void hci_auth_req(struct hci_dev *hdev, unsigned long opt) |
| 260 | { |
| 261 | __u8 auth = opt; |
| 262 | |
| 263 | BT_DBG("%s %x", hdev->name, auth); |
| 264 | |
| 265 | /* Authentication */ |
| 266 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_AUTH_ENABLE, 1, &auth); |
| 267 | } |
| 268 | |
| 269 | static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt) |
| 270 | { |
| 271 | __u8 encrypt = opt; |
| 272 | |
| 273 | BT_DBG("%s %x", hdev->name, encrypt); |
| 274 | |
| 275 | /* Authentication */ |
| 276 | hci_send_cmd(hdev, OGF_HOST_CTL, OCF_WRITE_ENCRYPT_MODE, 1, &encrypt); |
| 277 | } |
| 278 | |
| 279 | /* Get HCI device by index. |
| 280 | * Device is held on return. */ |
| 281 | struct hci_dev *hci_dev_get(int index) |
| 282 | { |
| 283 | struct hci_dev *hdev = NULL; |
| 284 | struct list_head *p; |
| 285 | |
| 286 | BT_DBG("%d", index); |
| 287 | |
| 288 | if (index < 0) |
| 289 | return NULL; |
| 290 | |
| 291 | read_lock(&hci_dev_list_lock); |
| 292 | list_for_each(p, &hci_dev_list) { |
| 293 | struct hci_dev *d = list_entry(p, struct hci_dev, list); |
| 294 | if (d->id == index) { |
| 295 | hdev = hci_dev_hold(d); |
| 296 | break; |
| 297 | } |
| 298 | } |
| 299 | read_unlock(&hci_dev_list_lock); |
| 300 | return hdev; |
| 301 | } |
| 302 | EXPORT_SYMBOL(hci_dev_get); |
| 303 | |
| 304 | /* ---- Inquiry support ---- */ |
| 305 | static void inquiry_cache_flush(struct hci_dev *hdev) |
| 306 | { |
| 307 | struct inquiry_cache *cache = &hdev->inq_cache; |
| 308 | struct inquiry_entry *next = cache->list, *e; |
| 309 | |
| 310 | BT_DBG("cache %p", cache); |
| 311 | |
| 312 | cache->list = NULL; |
| 313 | while ((e = next)) { |
| 314 | next = e->next; |
| 315 | kfree(e); |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr) |
| 320 | { |
| 321 | struct inquiry_cache *cache = &hdev->inq_cache; |
| 322 | struct inquiry_entry *e; |
| 323 | |
| 324 | BT_DBG("cache %p, %s", cache, batostr(bdaddr)); |
| 325 | |
| 326 | for (e = cache->list; e; e = e->next) |
| 327 | if (!bacmp(&e->data.bdaddr, bdaddr)) |
| 328 | break; |
| 329 | return e; |
| 330 | } |
| 331 | |
| 332 | void hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data) |
| 333 | { |
| 334 | struct inquiry_cache *cache = &hdev->inq_cache; |
| 335 | struct inquiry_entry *e; |
| 336 | |
| 337 | BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr)); |
| 338 | |
| 339 | if (!(e = hci_inquiry_cache_lookup(hdev, &data->bdaddr))) { |
| 340 | /* Entry not in the cache. Add new one. */ |
| 341 | if (!(e = kmalloc(sizeof(struct inquiry_entry), GFP_ATOMIC))) |
| 342 | return; |
| 343 | memset(e, 0, sizeof(struct inquiry_entry)); |
| 344 | e->next = cache->list; |
| 345 | cache->list = e; |
| 346 | } |
| 347 | |
| 348 | memcpy(&e->data, data, sizeof(*data)); |
| 349 | e->timestamp = jiffies; |
| 350 | cache->timestamp = jiffies; |
| 351 | } |
| 352 | |
| 353 | static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf) |
| 354 | { |
| 355 | struct inquiry_cache *cache = &hdev->inq_cache; |
| 356 | struct inquiry_info *info = (struct inquiry_info *) buf; |
| 357 | struct inquiry_entry *e; |
| 358 | int copied = 0; |
| 359 | |
| 360 | for (e = cache->list; e && copied < num; e = e->next, copied++) { |
| 361 | struct inquiry_data *data = &e->data; |
| 362 | bacpy(&info->bdaddr, &data->bdaddr); |
| 363 | info->pscan_rep_mode = data->pscan_rep_mode; |
| 364 | info->pscan_period_mode = data->pscan_period_mode; |
| 365 | info->pscan_mode = data->pscan_mode; |
| 366 | memcpy(info->dev_class, data->dev_class, 3); |
| 367 | info->clock_offset = data->clock_offset; |
| 368 | info++; |
| 369 | } |
| 370 | |
| 371 | BT_DBG("cache %p, copied %d", cache, copied); |
| 372 | return copied; |
| 373 | } |
| 374 | |
| 375 | static void hci_inq_req(struct hci_dev *hdev, unsigned long opt) |
| 376 | { |
| 377 | struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt; |
| 378 | struct hci_cp_inquiry cp; |
| 379 | |
| 380 | BT_DBG("%s", hdev->name); |
| 381 | |
| 382 | if (test_bit(HCI_INQUIRY, &hdev->flags)) |
| 383 | return; |
| 384 | |
| 385 | /* Start Inquiry */ |
| 386 | memcpy(&cp.lap, &ir->lap, 3); |
| 387 | cp.length = ir->length; |
| 388 | cp.num_rsp = ir->num_rsp; |
| 389 | hci_send_cmd(hdev, OGF_LINK_CTL, OCF_INQUIRY, sizeof(cp), &cp); |
| 390 | } |
| 391 | |
| 392 | int hci_inquiry(void __user *arg) |
| 393 | { |
| 394 | __u8 __user *ptr = arg; |
| 395 | struct hci_inquiry_req ir; |
| 396 | struct hci_dev *hdev; |
| 397 | int err = 0, do_inquiry = 0, max_rsp; |
| 398 | long timeo; |
| 399 | __u8 *buf; |
| 400 | |
| 401 | if (copy_from_user(&ir, ptr, sizeof(ir))) |
| 402 | return -EFAULT; |
| 403 | |
| 404 | if (!(hdev = hci_dev_get(ir.dev_id))) |
| 405 | return -ENODEV; |
| 406 | |
| 407 | hci_dev_lock_bh(hdev); |
| 408 | if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX || |
| 409 | inquiry_cache_empty(hdev) || |
| 410 | ir.flags & IREQ_CACHE_FLUSH) { |
| 411 | inquiry_cache_flush(hdev); |
| 412 | do_inquiry = 1; |
| 413 | } |
| 414 | hci_dev_unlock_bh(hdev); |
| 415 | |
| 416 | timeo = ir.length * 2 * HZ; |
| 417 | if (do_inquiry && (err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo)) < 0) |
| 418 | goto done; |
| 419 | |
| 420 | /* for unlimited number of responses we will use buffer with 255 entries */ |
| 421 | max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp; |
| 422 | |
| 423 | /* cache_dump can't sleep. Therefore we allocate temp buffer and then |
| 424 | * copy it to the user space. |
| 425 | */ |
| 426 | if (!(buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL))) { |
| 427 | err = -ENOMEM; |
| 428 | goto done; |
| 429 | } |
| 430 | |
| 431 | hci_dev_lock_bh(hdev); |
| 432 | ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf); |
| 433 | hci_dev_unlock_bh(hdev); |
| 434 | |
| 435 | BT_DBG("num_rsp %d", ir.num_rsp); |
| 436 | |
| 437 | if (!copy_to_user(ptr, &ir, sizeof(ir))) { |
| 438 | ptr += sizeof(ir); |
| 439 | if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) * |
| 440 | ir.num_rsp)) |
| 441 | err = -EFAULT; |
| 442 | } else |
| 443 | err = -EFAULT; |
| 444 | |
| 445 | kfree(buf); |
| 446 | |
| 447 | done: |
| 448 | hci_dev_put(hdev); |
| 449 | return err; |
| 450 | } |
| 451 | |
| 452 | /* ---- HCI ioctl helpers ---- */ |
| 453 | |
| 454 | int hci_dev_open(__u16 dev) |
| 455 | { |
| 456 | struct hci_dev *hdev; |
| 457 | int ret = 0; |
| 458 | |
| 459 | if (!(hdev = hci_dev_get(dev))) |
| 460 | return -ENODEV; |
| 461 | |
| 462 | BT_DBG("%s %p", hdev->name, hdev); |
| 463 | |
| 464 | hci_req_lock(hdev); |
| 465 | |
| 466 | if (test_bit(HCI_UP, &hdev->flags)) { |
| 467 | ret = -EALREADY; |
| 468 | goto done; |
| 469 | } |
| 470 | |
| 471 | if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks)) |
| 472 | set_bit(HCI_RAW, &hdev->flags); |
| 473 | |
| 474 | if (hdev->open(hdev)) { |
| 475 | ret = -EIO; |
| 476 | goto done; |
| 477 | } |
| 478 | |
| 479 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
| 480 | atomic_set(&hdev->cmd_cnt, 1); |
| 481 | set_bit(HCI_INIT, &hdev->flags); |
| 482 | |
| 483 | //__hci_request(hdev, hci_reset_req, 0, HZ); |
| 484 | ret = __hci_request(hdev, hci_init_req, 0, HCI_INIT_TIMEOUT); |
| 485 | |
| 486 | clear_bit(HCI_INIT, &hdev->flags); |
| 487 | } |
| 488 | |
| 489 | if (!ret) { |
| 490 | hci_dev_hold(hdev); |
| 491 | set_bit(HCI_UP, &hdev->flags); |
| 492 | hci_notify(hdev, HCI_DEV_UP); |
| 493 | } else { |
| 494 | /* Init failed, cleanup */ |
| 495 | tasklet_kill(&hdev->rx_task); |
| 496 | tasklet_kill(&hdev->tx_task); |
| 497 | tasklet_kill(&hdev->cmd_task); |
| 498 | |
| 499 | skb_queue_purge(&hdev->cmd_q); |
| 500 | skb_queue_purge(&hdev->rx_q); |
| 501 | |
| 502 | if (hdev->flush) |
| 503 | hdev->flush(hdev); |
| 504 | |
| 505 | if (hdev->sent_cmd) { |
| 506 | kfree_skb(hdev->sent_cmd); |
| 507 | hdev->sent_cmd = NULL; |
| 508 | } |
| 509 | |
| 510 | hdev->close(hdev); |
| 511 | hdev->flags = 0; |
| 512 | } |
| 513 | |
| 514 | done: |
| 515 | hci_req_unlock(hdev); |
| 516 | hci_dev_put(hdev); |
| 517 | return ret; |
| 518 | } |
| 519 | |
| 520 | static int hci_dev_do_close(struct hci_dev *hdev) |
| 521 | { |
| 522 | BT_DBG("%s %p", hdev->name, hdev); |
| 523 | |
| 524 | hci_req_cancel(hdev, ENODEV); |
| 525 | hci_req_lock(hdev); |
| 526 | |
| 527 | if (!test_and_clear_bit(HCI_UP, &hdev->flags)) { |
| 528 | hci_req_unlock(hdev); |
| 529 | return 0; |
| 530 | } |
| 531 | |
| 532 | /* Kill RX and TX tasks */ |
| 533 | tasklet_kill(&hdev->rx_task); |
| 534 | tasklet_kill(&hdev->tx_task); |
| 535 | |
| 536 | hci_dev_lock_bh(hdev); |
| 537 | inquiry_cache_flush(hdev); |
| 538 | hci_conn_hash_flush(hdev); |
| 539 | hci_dev_unlock_bh(hdev); |
| 540 | |
| 541 | hci_notify(hdev, HCI_DEV_DOWN); |
| 542 | |
| 543 | if (hdev->flush) |
| 544 | hdev->flush(hdev); |
| 545 | |
| 546 | /* Reset device */ |
| 547 | skb_queue_purge(&hdev->cmd_q); |
| 548 | atomic_set(&hdev->cmd_cnt, 1); |
| 549 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
| 550 | set_bit(HCI_INIT, &hdev->flags); |
| 551 | __hci_request(hdev, hci_reset_req, 0, HZ/4); |
| 552 | clear_bit(HCI_INIT, &hdev->flags); |
| 553 | } |
| 554 | |
| 555 | /* Kill cmd task */ |
| 556 | tasklet_kill(&hdev->cmd_task); |
| 557 | |
| 558 | /* Drop queues */ |
| 559 | skb_queue_purge(&hdev->rx_q); |
| 560 | skb_queue_purge(&hdev->cmd_q); |
| 561 | skb_queue_purge(&hdev->raw_q); |
| 562 | |
| 563 | /* Drop last sent command */ |
| 564 | if (hdev->sent_cmd) { |
| 565 | kfree_skb(hdev->sent_cmd); |
| 566 | hdev->sent_cmd = NULL; |
| 567 | } |
| 568 | |
| 569 | /* After this point our queues are empty |
| 570 | * and no tasks are scheduled. */ |
| 571 | hdev->close(hdev); |
| 572 | |
| 573 | /* Clear flags */ |
| 574 | hdev->flags = 0; |
| 575 | |
| 576 | hci_req_unlock(hdev); |
| 577 | |
| 578 | hci_dev_put(hdev); |
| 579 | return 0; |
| 580 | } |
| 581 | |
| 582 | int hci_dev_close(__u16 dev) |
| 583 | { |
| 584 | struct hci_dev *hdev; |
| 585 | int err; |
| 586 | |
| 587 | if (!(hdev = hci_dev_get(dev))) |
| 588 | return -ENODEV; |
| 589 | err = hci_dev_do_close(hdev); |
| 590 | hci_dev_put(hdev); |
| 591 | return err; |
| 592 | } |
| 593 | |
| 594 | int hci_dev_reset(__u16 dev) |
| 595 | { |
| 596 | struct hci_dev *hdev; |
| 597 | int ret = 0; |
| 598 | |
| 599 | if (!(hdev = hci_dev_get(dev))) |
| 600 | return -ENODEV; |
| 601 | |
| 602 | hci_req_lock(hdev); |
| 603 | tasklet_disable(&hdev->tx_task); |
| 604 | |
| 605 | if (!test_bit(HCI_UP, &hdev->flags)) |
| 606 | goto done; |
| 607 | |
| 608 | /* Drop queues */ |
| 609 | skb_queue_purge(&hdev->rx_q); |
| 610 | skb_queue_purge(&hdev->cmd_q); |
| 611 | |
| 612 | hci_dev_lock_bh(hdev); |
| 613 | inquiry_cache_flush(hdev); |
| 614 | hci_conn_hash_flush(hdev); |
| 615 | hci_dev_unlock_bh(hdev); |
| 616 | |
| 617 | if (hdev->flush) |
| 618 | hdev->flush(hdev); |
| 619 | |
| 620 | atomic_set(&hdev->cmd_cnt, 1); |
| 621 | hdev->acl_cnt = 0; hdev->sco_cnt = 0; |
| 622 | |
| 623 | if (!test_bit(HCI_RAW, &hdev->flags)) |
| 624 | ret = __hci_request(hdev, hci_reset_req, 0, HCI_INIT_TIMEOUT); |
| 625 | |
| 626 | done: |
| 627 | tasklet_enable(&hdev->tx_task); |
| 628 | hci_req_unlock(hdev); |
| 629 | hci_dev_put(hdev); |
| 630 | return ret; |
| 631 | } |
| 632 | |
| 633 | int hci_dev_reset_stat(__u16 dev) |
| 634 | { |
| 635 | struct hci_dev *hdev; |
| 636 | int ret = 0; |
| 637 | |
| 638 | if (!(hdev = hci_dev_get(dev))) |
| 639 | return -ENODEV; |
| 640 | |
| 641 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
| 642 | |
| 643 | hci_dev_put(hdev); |
| 644 | |
| 645 | return ret; |
| 646 | } |
| 647 | |
| 648 | int hci_dev_cmd(unsigned int cmd, void __user *arg) |
| 649 | { |
| 650 | struct hci_dev *hdev; |
| 651 | struct hci_dev_req dr; |
| 652 | int err = 0; |
| 653 | |
| 654 | if (copy_from_user(&dr, arg, sizeof(dr))) |
| 655 | return -EFAULT; |
| 656 | |
| 657 | if (!(hdev = hci_dev_get(dr.dev_id))) |
| 658 | return -ENODEV; |
| 659 | |
| 660 | switch (cmd) { |
| 661 | case HCISETAUTH: |
| 662 | err = hci_request(hdev, hci_auth_req, dr.dev_opt, HCI_INIT_TIMEOUT); |
| 663 | break; |
| 664 | |
| 665 | case HCISETENCRYPT: |
| 666 | if (!lmp_encrypt_capable(hdev)) { |
| 667 | err = -EOPNOTSUPP; |
| 668 | break; |
| 669 | } |
| 670 | |
| 671 | if (!test_bit(HCI_AUTH, &hdev->flags)) { |
| 672 | /* Auth must be enabled first */ |
| 673 | err = hci_request(hdev, hci_auth_req, |
| 674 | dr.dev_opt, HCI_INIT_TIMEOUT); |
| 675 | if (err) |
| 676 | break; |
| 677 | } |
| 678 | |
| 679 | err = hci_request(hdev, hci_encrypt_req, |
| 680 | dr.dev_opt, HCI_INIT_TIMEOUT); |
| 681 | break; |
| 682 | |
| 683 | case HCISETSCAN: |
| 684 | err = hci_request(hdev, hci_scan_req, dr.dev_opt, HCI_INIT_TIMEOUT); |
| 685 | break; |
| 686 | |
| 687 | case HCISETPTYPE: |
| 688 | hdev->pkt_type = (__u16) dr.dev_opt; |
| 689 | break; |
| 690 | |
| 691 | case HCISETLINKPOL: |
| 692 | hdev->link_policy = (__u16) dr.dev_opt; |
| 693 | break; |
| 694 | |
| 695 | case HCISETLINKMODE: |
| 696 | hdev->link_mode = ((__u16) dr.dev_opt) & (HCI_LM_MASTER | HCI_LM_ACCEPT); |
| 697 | break; |
| 698 | |
| 699 | case HCISETACLMTU: |
| 700 | hdev->acl_mtu = *((__u16 *)&dr.dev_opt + 1); |
| 701 | hdev->acl_pkts = *((__u16 *)&dr.dev_opt + 0); |
| 702 | break; |
| 703 | |
| 704 | case HCISETSCOMTU: |
| 705 | hdev->sco_mtu = *((__u16 *)&dr.dev_opt + 1); |
| 706 | hdev->sco_pkts = *((__u16 *)&dr.dev_opt + 0); |
| 707 | break; |
| 708 | |
| 709 | default: |
| 710 | err = -EINVAL; |
| 711 | break; |
| 712 | } |
| 713 | hci_dev_put(hdev); |
| 714 | return err; |
| 715 | } |
| 716 | |
| 717 | int hci_get_dev_list(void __user *arg) |
| 718 | { |
| 719 | struct hci_dev_list_req *dl; |
| 720 | struct hci_dev_req *dr; |
| 721 | struct list_head *p; |
| 722 | int n = 0, size, err; |
| 723 | __u16 dev_num; |
| 724 | |
| 725 | if (get_user(dev_num, (__u16 __user *) arg)) |
| 726 | return -EFAULT; |
| 727 | |
| 728 | if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr)) |
| 729 | return -EINVAL; |
| 730 | |
| 731 | size = sizeof(*dl) + dev_num * sizeof(*dr); |
| 732 | |
| 733 | if (!(dl = kmalloc(size, GFP_KERNEL))) |
| 734 | return -ENOMEM; |
| 735 | |
| 736 | dr = dl->dev_req; |
| 737 | |
| 738 | read_lock_bh(&hci_dev_list_lock); |
| 739 | list_for_each(p, &hci_dev_list) { |
| 740 | struct hci_dev *hdev; |
| 741 | hdev = list_entry(p, struct hci_dev, list); |
| 742 | (dr + n)->dev_id = hdev->id; |
| 743 | (dr + n)->dev_opt = hdev->flags; |
| 744 | if (++n >= dev_num) |
| 745 | break; |
| 746 | } |
| 747 | read_unlock_bh(&hci_dev_list_lock); |
| 748 | |
| 749 | dl->dev_num = n; |
| 750 | size = sizeof(*dl) + n * sizeof(*dr); |
| 751 | |
| 752 | err = copy_to_user(arg, dl, size); |
| 753 | kfree(dl); |
| 754 | |
| 755 | return err ? -EFAULT : 0; |
| 756 | } |
| 757 | |
| 758 | int hci_get_dev_info(void __user *arg) |
| 759 | { |
| 760 | struct hci_dev *hdev; |
| 761 | struct hci_dev_info di; |
| 762 | int err = 0; |
| 763 | |
| 764 | if (copy_from_user(&di, arg, sizeof(di))) |
| 765 | return -EFAULT; |
| 766 | |
| 767 | if (!(hdev = hci_dev_get(di.dev_id))) |
| 768 | return -ENODEV; |
| 769 | |
| 770 | strcpy(di.name, hdev->name); |
| 771 | di.bdaddr = hdev->bdaddr; |
| 772 | di.type = hdev->type; |
| 773 | di.flags = hdev->flags; |
| 774 | di.pkt_type = hdev->pkt_type; |
| 775 | di.acl_mtu = hdev->acl_mtu; |
| 776 | di.acl_pkts = hdev->acl_pkts; |
| 777 | di.sco_mtu = hdev->sco_mtu; |
| 778 | di.sco_pkts = hdev->sco_pkts; |
| 779 | di.link_policy = hdev->link_policy; |
| 780 | di.link_mode = hdev->link_mode; |
| 781 | |
| 782 | memcpy(&di.stat, &hdev->stat, sizeof(di.stat)); |
| 783 | memcpy(&di.features, &hdev->features, sizeof(di.features)); |
| 784 | |
| 785 | if (copy_to_user(arg, &di, sizeof(di))) |
| 786 | err = -EFAULT; |
| 787 | |
| 788 | hci_dev_put(hdev); |
| 789 | |
| 790 | return err; |
| 791 | } |
| 792 | |
| 793 | /* ---- Interface to HCI drivers ---- */ |
| 794 | |
| 795 | /* Alloc HCI device */ |
| 796 | struct hci_dev *hci_alloc_dev(void) |
| 797 | { |
| 798 | struct hci_dev *hdev; |
| 799 | |
| 800 | hdev = kmalloc(sizeof(struct hci_dev), GFP_KERNEL); |
| 801 | if (!hdev) |
| 802 | return NULL; |
| 803 | |
| 804 | memset(hdev, 0, sizeof(struct hci_dev)); |
| 805 | |
| 806 | skb_queue_head_init(&hdev->driver_init); |
| 807 | |
| 808 | return hdev; |
| 809 | } |
| 810 | EXPORT_SYMBOL(hci_alloc_dev); |
| 811 | |
| 812 | /* Free HCI device */ |
| 813 | void hci_free_dev(struct hci_dev *hdev) |
| 814 | { |
| 815 | skb_queue_purge(&hdev->driver_init); |
| 816 | |
| 817 | /* will free via class release */ |
| 818 | class_device_put(&hdev->class_dev); |
| 819 | } |
| 820 | EXPORT_SYMBOL(hci_free_dev); |
| 821 | |
| 822 | /* Register HCI device */ |
| 823 | int hci_register_dev(struct hci_dev *hdev) |
| 824 | { |
| 825 | struct list_head *head = &hci_dev_list, *p; |
| 826 | int id = 0; |
| 827 | |
| 828 | BT_DBG("%p name %s type %d owner %p", hdev, hdev->name, hdev->type, hdev->owner); |
| 829 | |
| 830 | if (!hdev->open || !hdev->close || !hdev->destruct) |
| 831 | return -EINVAL; |
| 832 | |
| 833 | write_lock_bh(&hci_dev_list_lock); |
| 834 | |
| 835 | /* Find first available device id */ |
| 836 | list_for_each(p, &hci_dev_list) { |
| 837 | if (list_entry(p, struct hci_dev, list)->id != id) |
| 838 | break; |
| 839 | head = p; id++; |
| 840 | } |
| 841 | |
| 842 | sprintf(hdev->name, "hci%d", id); |
| 843 | hdev->id = id; |
| 844 | list_add(&hdev->list, head); |
| 845 | |
| 846 | atomic_set(&hdev->refcnt, 1); |
| 847 | spin_lock_init(&hdev->lock); |
| 848 | |
| 849 | hdev->flags = 0; |
| 850 | hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1); |
| 851 | hdev->link_mode = (HCI_LM_ACCEPT); |
| 852 | |
| 853 | tasklet_init(&hdev->cmd_task, hci_cmd_task,(unsigned long) hdev); |
| 854 | tasklet_init(&hdev->rx_task, hci_rx_task, (unsigned long) hdev); |
| 855 | tasklet_init(&hdev->tx_task, hci_tx_task, (unsigned long) hdev); |
| 856 | |
| 857 | skb_queue_head_init(&hdev->rx_q); |
| 858 | skb_queue_head_init(&hdev->cmd_q); |
| 859 | skb_queue_head_init(&hdev->raw_q); |
| 860 | |
| 861 | init_waitqueue_head(&hdev->req_wait_q); |
| 862 | init_MUTEX(&hdev->req_lock); |
| 863 | |
| 864 | inquiry_cache_init(hdev); |
| 865 | |
| 866 | hci_conn_hash_init(hdev); |
| 867 | |
| 868 | memset(&hdev->stat, 0, sizeof(struct hci_dev_stats)); |
| 869 | |
| 870 | atomic_set(&hdev->promisc, 0); |
| 871 | |
| 872 | write_unlock_bh(&hci_dev_list_lock); |
| 873 | |
| 874 | hci_register_sysfs(hdev); |
| 875 | |
| 876 | hci_notify(hdev, HCI_DEV_REG); |
| 877 | |
| 878 | return id; |
| 879 | } |
| 880 | EXPORT_SYMBOL(hci_register_dev); |
| 881 | |
| 882 | /* Unregister HCI device */ |
| 883 | int hci_unregister_dev(struct hci_dev *hdev) |
| 884 | { |
| 885 | BT_DBG("%p name %s type %d", hdev, hdev->name, hdev->type); |
| 886 | |
| 887 | hci_unregister_sysfs(hdev); |
| 888 | |
| 889 | write_lock_bh(&hci_dev_list_lock); |
| 890 | list_del(&hdev->list); |
| 891 | write_unlock_bh(&hci_dev_list_lock); |
| 892 | |
| 893 | hci_dev_do_close(hdev); |
| 894 | |
| 895 | hci_notify(hdev, HCI_DEV_UNREG); |
| 896 | |
| 897 | __hci_dev_put(hdev); |
| 898 | return 0; |
| 899 | } |
| 900 | EXPORT_SYMBOL(hci_unregister_dev); |
| 901 | |
| 902 | /* Suspend HCI device */ |
| 903 | int hci_suspend_dev(struct hci_dev *hdev) |
| 904 | { |
| 905 | hci_notify(hdev, HCI_DEV_SUSPEND); |
| 906 | return 0; |
| 907 | } |
| 908 | EXPORT_SYMBOL(hci_suspend_dev); |
| 909 | |
| 910 | /* Resume HCI device */ |
| 911 | int hci_resume_dev(struct hci_dev *hdev) |
| 912 | { |
| 913 | hci_notify(hdev, HCI_DEV_RESUME); |
| 914 | return 0; |
| 915 | } |
| 916 | EXPORT_SYMBOL(hci_resume_dev); |
| 917 | |
| 918 | /* ---- Interface to upper protocols ---- */ |
| 919 | |
| 920 | /* Register/Unregister protocols. |
| 921 | * hci_task_lock is used to ensure that no tasks are running. */ |
| 922 | int hci_register_proto(struct hci_proto *hp) |
| 923 | { |
| 924 | int err = 0; |
| 925 | |
| 926 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); |
| 927 | |
| 928 | if (hp->id >= HCI_MAX_PROTO) |
| 929 | return -EINVAL; |
| 930 | |
| 931 | write_lock_bh(&hci_task_lock); |
| 932 | |
| 933 | if (!hci_proto[hp->id]) |
| 934 | hci_proto[hp->id] = hp; |
| 935 | else |
| 936 | err = -EEXIST; |
| 937 | |
| 938 | write_unlock_bh(&hci_task_lock); |
| 939 | |
| 940 | return err; |
| 941 | } |
| 942 | EXPORT_SYMBOL(hci_register_proto); |
| 943 | |
| 944 | int hci_unregister_proto(struct hci_proto *hp) |
| 945 | { |
| 946 | int err = 0; |
| 947 | |
| 948 | BT_DBG("%p name %s id %d", hp, hp->name, hp->id); |
| 949 | |
| 950 | if (hp->id >= HCI_MAX_PROTO) |
| 951 | return -EINVAL; |
| 952 | |
| 953 | write_lock_bh(&hci_task_lock); |
| 954 | |
| 955 | if (hci_proto[hp->id]) |
| 956 | hci_proto[hp->id] = NULL; |
| 957 | else |
| 958 | err = -ENOENT; |
| 959 | |
| 960 | write_unlock_bh(&hci_task_lock); |
| 961 | |
| 962 | return err; |
| 963 | } |
| 964 | EXPORT_SYMBOL(hci_unregister_proto); |
| 965 | |
| 966 | int hci_register_cb(struct hci_cb *cb) |
| 967 | { |
| 968 | BT_DBG("%p name %s", cb, cb->name); |
| 969 | |
| 970 | write_lock_bh(&hci_cb_list_lock); |
| 971 | list_add(&cb->list, &hci_cb_list); |
| 972 | write_unlock_bh(&hci_cb_list_lock); |
| 973 | |
| 974 | return 0; |
| 975 | } |
| 976 | EXPORT_SYMBOL(hci_register_cb); |
| 977 | |
| 978 | int hci_unregister_cb(struct hci_cb *cb) |
| 979 | { |
| 980 | BT_DBG("%p name %s", cb, cb->name); |
| 981 | |
| 982 | write_lock_bh(&hci_cb_list_lock); |
| 983 | list_del(&cb->list); |
| 984 | write_unlock_bh(&hci_cb_list_lock); |
| 985 | |
| 986 | return 0; |
| 987 | } |
| 988 | EXPORT_SYMBOL(hci_unregister_cb); |
| 989 | |
| 990 | static int hci_send_frame(struct sk_buff *skb) |
| 991 | { |
| 992 | struct hci_dev *hdev = (struct hci_dev *) skb->dev; |
| 993 | |
| 994 | if (!hdev) { |
| 995 | kfree_skb(skb); |
| 996 | return -ENODEV; |
| 997 | } |
| 998 | |
| 999 | BT_DBG("%s type %d len %d", hdev->name, skb->pkt_type, skb->len); |
| 1000 | |
| 1001 | if (atomic_read(&hdev->promisc)) { |
| 1002 | /* Time stamp */ |
| 1003 | do_gettimeofday(&skb->stamp); |
| 1004 | |
| 1005 | hci_send_to_sock(hdev, skb); |
| 1006 | } |
| 1007 | |
| 1008 | /* Get rid of skb owner, prior to sending to the driver. */ |
| 1009 | skb_orphan(skb); |
| 1010 | |
| 1011 | return hdev->send(skb); |
| 1012 | } |
| 1013 | |
| 1014 | /* Send HCI command */ |
| 1015 | int hci_send_cmd(struct hci_dev *hdev, __u16 ogf, __u16 ocf, __u32 plen, void *param) |
| 1016 | { |
| 1017 | int len = HCI_COMMAND_HDR_SIZE + plen; |
| 1018 | struct hci_command_hdr *hdr; |
| 1019 | struct sk_buff *skb; |
| 1020 | |
| 1021 | BT_DBG("%s ogf 0x%x ocf 0x%x plen %d", hdev->name, ogf, ocf, plen); |
| 1022 | |
| 1023 | skb = bt_skb_alloc(len, GFP_ATOMIC); |
| 1024 | if (!skb) { |
| 1025 | BT_ERR("%s Can't allocate memory for HCI command", hdev->name); |
| 1026 | return -ENOMEM; |
| 1027 | } |
| 1028 | |
| 1029 | hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE); |
| 1030 | hdr->opcode = __cpu_to_le16(hci_opcode_pack(ogf, ocf)); |
| 1031 | hdr->plen = plen; |
| 1032 | |
| 1033 | if (plen) |
| 1034 | memcpy(skb_put(skb, plen), param, plen); |
| 1035 | |
| 1036 | BT_DBG("skb len %d", skb->len); |
| 1037 | |
| 1038 | skb->pkt_type = HCI_COMMAND_PKT; |
| 1039 | skb->dev = (void *) hdev; |
| 1040 | skb_queue_tail(&hdev->cmd_q, skb); |
| 1041 | hci_sched_cmd(hdev); |
| 1042 | |
| 1043 | return 0; |
| 1044 | } |
| 1045 | EXPORT_SYMBOL(hci_send_cmd); |
| 1046 | |
| 1047 | /* Get data from the previously sent command */ |
| 1048 | void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 ogf, __u16 ocf) |
| 1049 | { |
| 1050 | struct hci_command_hdr *hdr; |
| 1051 | |
| 1052 | if (!hdev->sent_cmd) |
| 1053 | return NULL; |
| 1054 | |
| 1055 | hdr = (void *) hdev->sent_cmd->data; |
| 1056 | |
| 1057 | if (hdr->opcode != __cpu_to_le16(hci_opcode_pack(ogf, ocf))) |
| 1058 | return NULL; |
| 1059 | |
| 1060 | BT_DBG("%s ogf 0x%x ocf 0x%x", hdev->name, ogf, ocf); |
| 1061 | |
| 1062 | return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE; |
| 1063 | } |
| 1064 | |
| 1065 | /* Send ACL data */ |
| 1066 | static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags) |
| 1067 | { |
| 1068 | struct hci_acl_hdr *hdr; |
| 1069 | int len = skb->len; |
| 1070 | |
| 1071 | hdr = (struct hci_acl_hdr *) skb_push(skb, HCI_ACL_HDR_SIZE); |
| 1072 | hdr->handle = __cpu_to_le16(hci_handle_pack(handle, flags)); |
| 1073 | hdr->dlen = __cpu_to_le16(len); |
| 1074 | |
| 1075 | skb->h.raw = (void *) hdr; |
| 1076 | } |
| 1077 | |
| 1078 | int hci_send_acl(struct hci_conn *conn, struct sk_buff *skb, __u16 flags) |
| 1079 | { |
| 1080 | struct hci_dev *hdev = conn->hdev; |
| 1081 | struct sk_buff *list; |
| 1082 | |
| 1083 | BT_DBG("%s conn %p flags 0x%x", hdev->name, conn, flags); |
| 1084 | |
| 1085 | skb->dev = (void *) hdev; |
| 1086 | skb->pkt_type = HCI_ACLDATA_PKT; |
| 1087 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_START); |
| 1088 | |
| 1089 | if (!(list = skb_shinfo(skb)->frag_list)) { |
| 1090 | /* Non fragmented */ |
| 1091 | BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len); |
| 1092 | |
| 1093 | skb_queue_tail(&conn->data_q, skb); |
| 1094 | } else { |
| 1095 | /* Fragmented */ |
| 1096 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
| 1097 | |
| 1098 | skb_shinfo(skb)->frag_list = NULL; |
| 1099 | |
| 1100 | /* Queue all fragments atomically */ |
| 1101 | spin_lock_bh(&conn->data_q.lock); |
| 1102 | |
| 1103 | __skb_queue_tail(&conn->data_q, skb); |
| 1104 | do { |
| 1105 | skb = list; list = list->next; |
| 1106 | |
| 1107 | skb->dev = (void *) hdev; |
| 1108 | skb->pkt_type = HCI_ACLDATA_PKT; |
| 1109 | hci_add_acl_hdr(skb, conn->handle, flags | ACL_CONT); |
| 1110 | |
| 1111 | BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len); |
| 1112 | |
| 1113 | __skb_queue_tail(&conn->data_q, skb); |
| 1114 | } while (list); |
| 1115 | |
| 1116 | spin_unlock_bh(&conn->data_q.lock); |
| 1117 | } |
| 1118 | |
| 1119 | hci_sched_tx(hdev); |
| 1120 | return 0; |
| 1121 | } |
| 1122 | EXPORT_SYMBOL(hci_send_acl); |
| 1123 | |
| 1124 | /* Send SCO data */ |
| 1125 | int hci_send_sco(struct hci_conn *conn, struct sk_buff *skb) |
| 1126 | { |
| 1127 | struct hci_dev *hdev = conn->hdev; |
| 1128 | struct hci_sco_hdr hdr; |
| 1129 | |
| 1130 | BT_DBG("%s len %d", hdev->name, skb->len); |
| 1131 | |
| 1132 | if (skb->len > hdev->sco_mtu) { |
| 1133 | kfree_skb(skb); |
| 1134 | return -EINVAL; |
| 1135 | } |
| 1136 | |
| 1137 | hdr.handle = __cpu_to_le16(conn->handle); |
| 1138 | hdr.dlen = skb->len; |
| 1139 | |
| 1140 | skb->h.raw = skb_push(skb, HCI_SCO_HDR_SIZE); |
| 1141 | memcpy(skb->h.raw, &hdr, HCI_SCO_HDR_SIZE); |
| 1142 | |
| 1143 | skb->dev = (void *) hdev; |
| 1144 | skb->pkt_type = HCI_SCODATA_PKT; |
| 1145 | skb_queue_tail(&conn->data_q, skb); |
| 1146 | hci_sched_tx(hdev); |
| 1147 | return 0; |
| 1148 | } |
| 1149 | EXPORT_SYMBOL(hci_send_sco); |
| 1150 | |
| 1151 | /* ---- HCI TX task (outgoing data) ---- */ |
| 1152 | |
| 1153 | /* HCI Connection scheduler */ |
| 1154 | static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote) |
| 1155 | { |
| 1156 | struct hci_conn_hash *h = &hdev->conn_hash; |
| 1157 | struct hci_conn *conn = NULL; |
| 1158 | int num = 0, min = ~0; |
| 1159 | struct list_head *p; |
| 1160 | |
| 1161 | /* We don't have to lock device here. Connections are always |
| 1162 | * added and removed with TX task disabled. */ |
| 1163 | list_for_each(p, &h->list) { |
| 1164 | struct hci_conn *c; |
| 1165 | c = list_entry(p, struct hci_conn, list); |
| 1166 | |
| 1167 | if (c->type != type || c->state != BT_CONNECTED |
| 1168 | || skb_queue_empty(&c->data_q)) |
| 1169 | continue; |
| 1170 | num++; |
| 1171 | |
| 1172 | if (c->sent < min) { |
| 1173 | min = c->sent; |
| 1174 | conn = c; |
| 1175 | } |
| 1176 | } |
| 1177 | |
| 1178 | if (conn) { |
| 1179 | int cnt = (type == ACL_LINK ? hdev->acl_cnt : hdev->sco_cnt); |
| 1180 | int q = cnt / num; |
| 1181 | *quote = q ? q : 1; |
| 1182 | } else |
| 1183 | *quote = 0; |
| 1184 | |
| 1185 | BT_DBG("conn %p quote %d", conn, *quote); |
| 1186 | return conn; |
| 1187 | } |
| 1188 | |
| 1189 | static inline void hci_acl_tx_to(struct hci_dev *hdev) |
| 1190 | { |
| 1191 | struct hci_conn_hash *h = &hdev->conn_hash; |
| 1192 | struct list_head *p; |
| 1193 | struct hci_conn *c; |
| 1194 | |
| 1195 | BT_ERR("%s ACL tx timeout", hdev->name); |
| 1196 | |
| 1197 | /* Kill stalled connections */ |
| 1198 | list_for_each(p, &h->list) { |
| 1199 | c = list_entry(p, struct hci_conn, list); |
| 1200 | if (c->type == ACL_LINK && c->sent) { |
| 1201 | BT_ERR("%s killing stalled ACL connection %s", |
| 1202 | hdev->name, batostr(&c->dst)); |
| 1203 | hci_acl_disconn(c, 0x13); |
| 1204 | } |
| 1205 | } |
| 1206 | } |
| 1207 | |
| 1208 | static inline void hci_sched_acl(struct hci_dev *hdev) |
| 1209 | { |
| 1210 | struct hci_conn *conn; |
| 1211 | struct sk_buff *skb; |
| 1212 | int quote; |
| 1213 | |
| 1214 | BT_DBG("%s", hdev->name); |
| 1215 | |
| 1216 | if (!test_bit(HCI_RAW, &hdev->flags)) { |
| 1217 | /* ACL tx timeout must be longer than maximum |
| 1218 | * link supervision timeout (40.9 seconds) */ |
| 1219 | if (!hdev->acl_cnt && (jiffies - hdev->acl_last_tx) > (HZ * 45)) |
| 1220 | hci_acl_tx_to(hdev); |
| 1221 | } |
| 1222 | |
| 1223 | while (hdev->acl_cnt && (conn = hci_low_sent(hdev, ACL_LINK, "e))) { |
| 1224 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { |
| 1225 | BT_DBG("skb %p len %d", skb, skb->len); |
| 1226 | hci_send_frame(skb); |
| 1227 | hdev->acl_last_tx = jiffies; |
| 1228 | |
| 1229 | hdev->acl_cnt--; |
| 1230 | conn->sent++; |
| 1231 | } |
| 1232 | } |
| 1233 | } |
| 1234 | |
| 1235 | /* Schedule SCO */ |
| 1236 | static inline void hci_sched_sco(struct hci_dev *hdev) |
| 1237 | { |
| 1238 | struct hci_conn *conn; |
| 1239 | struct sk_buff *skb; |
| 1240 | int quote; |
| 1241 | |
| 1242 | BT_DBG("%s", hdev->name); |
| 1243 | |
| 1244 | while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, "e))) { |
| 1245 | while (quote-- && (skb = skb_dequeue(&conn->data_q))) { |
| 1246 | BT_DBG("skb %p len %d", skb, skb->len); |
| 1247 | hci_send_frame(skb); |
| 1248 | |
| 1249 | conn->sent++; |
| 1250 | if (conn->sent == ~0) |
| 1251 | conn->sent = 0; |
| 1252 | } |
| 1253 | } |
| 1254 | } |
| 1255 | |
| 1256 | static void hci_tx_task(unsigned long arg) |
| 1257 | { |
| 1258 | struct hci_dev *hdev = (struct hci_dev *) arg; |
| 1259 | struct sk_buff *skb; |
| 1260 | |
| 1261 | read_lock(&hci_task_lock); |
| 1262 | |
| 1263 | BT_DBG("%s acl %d sco %d", hdev->name, hdev->acl_cnt, hdev->sco_cnt); |
| 1264 | |
| 1265 | /* Schedule queues and send stuff to HCI driver */ |
| 1266 | |
| 1267 | hci_sched_acl(hdev); |
| 1268 | |
| 1269 | hci_sched_sco(hdev); |
| 1270 | |
| 1271 | /* Send next queued raw (unknown type) packet */ |
| 1272 | while ((skb = skb_dequeue(&hdev->raw_q))) |
| 1273 | hci_send_frame(skb); |
| 1274 | |
| 1275 | read_unlock(&hci_task_lock); |
| 1276 | } |
| 1277 | |
| 1278 | /* ----- HCI RX task (incoming data proccessing) ----- */ |
| 1279 | |
| 1280 | /* ACL data packet */ |
| 1281 | static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
| 1282 | { |
| 1283 | struct hci_acl_hdr *hdr = (void *) skb->data; |
| 1284 | struct hci_conn *conn; |
| 1285 | __u16 handle, flags; |
| 1286 | |
| 1287 | skb_pull(skb, HCI_ACL_HDR_SIZE); |
| 1288 | |
| 1289 | handle = __le16_to_cpu(hdr->handle); |
| 1290 | flags = hci_flags(handle); |
| 1291 | handle = hci_handle(handle); |
| 1292 | |
| 1293 | BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags); |
| 1294 | |
| 1295 | hdev->stat.acl_rx++; |
| 1296 | |
| 1297 | hci_dev_lock(hdev); |
| 1298 | conn = hci_conn_hash_lookup_handle(hdev, handle); |
| 1299 | hci_dev_unlock(hdev); |
| 1300 | |
| 1301 | if (conn) { |
| 1302 | register struct hci_proto *hp; |
| 1303 | |
| 1304 | /* Send to upper protocol */ |
| 1305 | if ((hp = hci_proto[HCI_PROTO_L2CAP]) && hp->recv_acldata) { |
| 1306 | hp->recv_acldata(conn, skb, flags); |
| 1307 | return; |
| 1308 | } |
| 1309 | } else { |
| 1310 | BT_ERR("%s ACL packet for unknown connection handle %d", |
| 1311 | hdev->name, handle); |
| 1312 | } |
| 1313 | |
| 1314 | kfree_skb(skb); |
| 1315 | } |
| 1316 | |
| 1317 | /* SCO data packet */ |
| 1318 | static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb) |
| 1319 | { |
| 1320 | struct hci_sco_hdr *hdr = (void *) skb->data; |
| 1321 | struct hci_conn *conn; |
| 1322 | __u16 handle; |
| 1323 | |
| 1324 | skb_pull(skb, HCI_SCO_HDR_SIZE); |
| 1325 | |
| 1326 | handle = __le16_to_cpu(hdr->handle); |
| 1327 | |
| 1328 | BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle); |
| 1329 | |
| 1330 | hdev->stat.sco_rx++; |
| 1331 | |
| 1332 | hci_dev_lock(hdev); |
| 1333 | conn = hci_conn_hash_lookup_handle(hdev, handle); |
| 1334 | hci_dev_unlock(hdev); |
| 1335 | |
| 1336 | if (conn) { |
| 1337 | register struct hci_proto *hp; |
| 1338 | |
| 1339 | /* Send to upper protocol */ |
| 1340 | if ((hp = hci_proto[HCI_PROTO_SCO]) && hp->recv_scodata) { |
| 1341 | hp->recv_scodata(conn, skb); |
| 1342 | return; |
| 1343 | } |
| 1344 | } else { |
| 1345 | BT_ERR("%s SCO packet for unknown connection handle %d", |
| 1346 | hdev->name, handle); |
| 1347 | } |
| 1348 | |
| 1349 | kfree_skb(skb); |
| 1350 | } |
| 1351 | |
| 1352 | void hci_rx_task(unsigned long arg) |
| 1353 | { |
| 1354 | struct hci_dev *hdev = (struct hci_dev *) arg; |
| 1355 | struct sk_buff *skb; |
| 1356 | |
| 1357 | BT_DBG("%s", hdev->name); |
| 1358 | |
| 1359 | read_lock(&hci_task_lock); |
| 1360 | |
| 1361 | while ((skb = skb_dequeue(&hdev->rx_q))) { |
| 1362 | if (atomic_read(&hdev->promisc)) { |
| 1363 | /* Send copy to the sockets */ |
| 1364 | hci_send_to_sock(hdev, skb); |
| 1365 | } |
| 1366 | |
| 1367 | if (test_bit(HCI_RAW, &hdev->flags)) { |
| 1368 | kfree_skb(skb); |
| 1369 | continue; |
| 1370 | } |
| 1371 | |
| 1372 | if (test_bit(HCI_INIT, &hdev->flags)) { |
| 1373 | /* Don't process data packets in this states. */ |
| 1374 | switch (skb->pkt_type) { |
| 1375 | case HCI_ACLDATA_PKT: |
| 1376 | case HCI_SCODATA_PKT: |
| 1377 | kfree_skb(skb); |
| 1378 | continue; |
| 1379 | }; |
| 1380 | } |
| 1381 | |
| 1382 | /* Process frame */ |
| 1383 | switch (skb->pkt_type) { |
| 1384 | case HCI_EVENT_PKT: |
| 1385 | hci_event_packet(hdev, skb); |
| 1386 | break; |
| 1387 | |
| 1388 | case HCI_ACLDATA_PKT: |
| 1389 | BT_DBG("%s ACL data packet", hdev->name); |
| 1390 | hci_acldata_packet(hdev, skb); |
| 1391 | break; |
| 1392 | |
| 1393 | case HCI_SCODATA_PKT: |
| 1394 | BT_DBG("%s SCO data packet", hdev->name); |
| 1395 | hci_scodata_packet(hdev, skb); |
| 1396 | break; |
| 1397 | |
| 1398 | default: |
| 1399 | kfree_skb(skb); |
| 1400 | break; |
| 1401 | } |
| 1402 | } |
| 1403 | |
| 1404 | read_unlock(&hci_task_lock); |
| 1405 | } |
| 1406 | |
| 1407 | static void hci_cmd_task(unsigned long arg) |
| 1408 | { |
| 1409 | struct hci_dev *hdev = (struct hci_dev *) arg; |
| 1410 | struct sk_buff *skb; |
| 1411 | |
| 1412 | BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt)); |
| 1413 | |
| 1414 | if (!atomic_read(&hdev->cmd_cnt) && (jiffies - hdev->cmd_last_tx) > HZ) { |
| 1415 | BT_ERR("%s command tx timeout", hdev->name); |
| 1416 | atomic_set(&hdev->cmd_cnt, 1); |
| 1417 | } |
| 1418 | |
| 1419 | /* Send queued commands */ |
| 1420 | if (atomic_read(&hdev->cmd_cnt) && (skb = skb_dequeue(&hdev->cmd_q))) { |
| 1421 | if (hdev->sent_cmd) |
| 1422 | kfree_skb(hdev->sent_cmd); |
| 1423 | |
| 1424 | if ((hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC))) { |
| 1425 | atomic_dec(&hdev->cmd_cnt); |
| 1426 | hci_send_frame(skb); |
| 1427 | hdev->cmd_last_tx = jiffies; |
| 1428 | } else { |
| 1429 | skb_queue_head(&hdev->cmd_q, skb); |
| 1430 | hci_sched_cmd(hdev); |
| 1431 | } |
| 1432 | } |
| 1433 | } |