Andrei Emeltchenko | 903e454 | 2012-09-27 17:26:09 +0300 | [diff] [blame] | 1 | /* |
| 2 | Copyright (c) 2011,2012 Intel Corp. |
| 3 | |
| 4 | This program is free software; you can redistribute it and/or modify |
| 5 | it under the terms of the GNU General Public License version 2 and |
| 6 | only version 2 as published by the Free Software Foundation. |
| 7 | |
| 8 | This program is distributed in the hope that it will be useful, |
| 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | GNU General Public License for more details. |
| 12 | */ |
| 13 | |
| 14 | #include <net/bluetooth/bluetooth.h> |
| 15 | #include <net/bluetooth/hci.h> |
| 16 | #include <net/bluetooth/hci_core.h> |
Dmitry Kasatkin | ba221bb | 2012-09-27 17:26:17 +0300 | [diff] [blame] | 17 | #include <crypto/hash.h> |
Andrei Emeltchenko | 903e454 | 2012-09-27 17:26:09 +0300 | [diff] [blame] | 18 | |
Marcel Holtmann | 7024728 | 2013-10-10 14:54:15 -0700 | [diff] [blame] | 19 | #include "a2mp.h" |
Marcel Holtmann | 7ef9fbf | 2013-10-10 14:54:14 -0700 | [diff] [blame] | 20 | #include "amp.h" |
| 21 | |
Andrei Emeltchenko | 52c0d6e | 2012-09-27 17:26:12 +0300 | [diff] [blame] | 22 | /* Remote AMP Controllers interface */ |
Andrei Emeltchenko | 0b26ab9 | 2012-09-27 17:26:24 +0300 | [diff] [blame] | 23 | void amp_ctrl_get(struct amp_ctrl *ctrl) |
Andrei Emeltchenko | 52c0d6e | 2012-09-27 17:26:12 +0300 | [diff] [blame] | 24 | { |
| 25 | BT_DBG("ctrl %p orig refcnt %d", ctrl, |
| 26 | atomic_read(&ctrl->kref.refcount)); |
| 27 | |
| 28 | kref_get(&ctrl->kref); |
| 29 | } |
| 30 | |
| 31 | static void amp_ctrl_destroy(struct kref *kref) |
| 32 | { |
| 33 | struct amp_ctrl *ctrl = container_of(kref, struct amp_ctrl, kref); |
| 34 | |
| 35 | BT_DBG("ctrl %p", ctrl); |
| 36 | |
| 37 | kfree(ctrl->assoc); |
| 38 | kfree(ctrl); |
| 39 | } |
| 40 | |
| 41 | int amp_ctrl_put(struct amp_ctrl *ctrl) |
| 42 | { |
| 43 | BT_DBG("ctrl %p orig refcnt %d", ctrl, |
| 44 | atomic_read(&ctrl->kref.refcount)); |
| 45 | |
| 46 | return kref_put(&ctrl->kref, &_ctrl_destroy); |
| 47 | } |
| 48 | |
Andrei Emeltchenko | fa4ebc6 | 2012-10-05 16:56:55 +0300 | [diff] [blame] | 49 | struct amp_ctrl *amp_ctrl_add(struct amp_mgr *mgr, u8 id) |
Andrei Emeltchenko | 52c0d6e | 2012-09-27 17:26:12 +0300 | [diff] [blame] | 50 | { |
| 51 | struct amp_ctrl *ctrl; |
| 52 | |
| 53 | ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); |
| 54 | if (!ctrl) |
| 55 | return NULL; |
| 56 | |
Andrei Emeltchenko | fa4ebc6 | 2012-10-05 16:56:55 +0300 | [diff] [blame] | 57 | kref_init(&ctrl->kref); |
| 58 | ctrl->id = id; |
| 59 | |
Andrei Emeltchenko | 52c0d6e | 2012-09-27 17:26:12 +0300 | [diff] [blame] | 60 | mutex_lock(&mgr->amp_ctrls_lock); |
| 61 | list_add(&ctrl->list, &mgr->amp_ctrls); |
| 62 | mutex_unlock(&mgr->amp_ctrls_lock); |
| 63 | |
Andrei Emeltchenko | 52c0d6e | 2012-09-27 17:26:12 +0300 | [diff] [blame] | 64 | BT_DBG("mgr %p ctrl %p", mgr, ctrl); |
| 65 | |
| 66 | return ctrl; |
| 67 | } |
| 68 | |
| 69 | void amp_ctrl_list_flush(struct amp_mgr *mgr) |
| 70 | { |
| 71 | struct amp_ctrl *ctrl, *n; |
| 72 | |
| 73 | BT_DBG("mgr %p", mgr); |
| 74 | |
| 75 | mutex_lock(&mgr->amp_ctrls_lock); |
| 76 | list_for_each_entry_safe(ctrl, n, &mgr->amp_ctrls, list) { |
| 77 | list_del(&ctrl->list); |
| 78 | amp_ctrl_put(ctrl); |
| 79 | } |
| 80 | mutex_unlock(&mgr->amp_ctrls_lock); |
| 81 | } |
| 82 | |
| 83 | struct amp_ctrl *amp_ctrl_lookup(struct amp_mgr *mgr, u8 id) |
| 84 | { |
| 85 | struct amp_ctrl *ctrl; |
| 86 | |
| 87 | BT_DBG("mgr %p id %d", mgr, id); |
| 88 | |
| 89 | mutex_lock(&mgr->amp_ctrls_lock); |
| 90 | list_for_each_entry(ctrl, &mgr->amp_ctrls, list) { |
| 91 | if (ctrl->id == id) { |
| 92 | amp_ctrl_get(ctrl); |
| 93 | mutex_unlock(&mgr->amp_ctrls_lock); |
| 94 | return ctrl; |
| 95 | } |
| 96 | } |
| 97 | mutex_unlock(&mgr->amp_ctrls_lock); |
| 98 | |
| 99 | return NULL; |
| 100 | } |
| 101 | |
Andrei Emeltchenko | 3161ae1 | 2012-09-27 17:26:11 +0300 | [diff] [blame] | 102 | /* Physical Link interface */ |
| 103 | static u8 __next_handle(struct amp_mgr *mgr) |
| 104 | { |
| 105 | if (++mgr->handle == 0) |
| 106 | mgr->handle = 1; |
| 107 | |
| 108 | return mgr->handle; |
| 109 | } |
| 110 | |
| 111 | struct hci_conn *phylink_add(struct hci_dev *hdev, struct amp_mgr *mgr, |
Andrei Emeltchenko | a0c234f | 2012-10-05 16:56:56 +0300 | [diff] [blame] | 112 | u8 remote_id, bool out) |
Andrei Emeltchenko | 3161ae1 | 2012-09-27 17:26:11 +0300 | [diff] [blame] | 113 | { |
Marcel Holtmann | bdc8ead2 | 2013-10-13 02:23:38 -0700 | [diff] [blame] | 114 | bdaddr_t *dst = &mgr->l2cap_conn->hcon->dst; |
Andrei Emeltchenko | 3161ae1 | 2012-09-27 17:26:11 +0300 | [diff] [blame] | 115 | struct hci_conn *hcon; |
Johan Hedberg | a5c4e30 | 2014-07-16 11:56:07 +0300 | [diff] [blame] | 116 | u8 role = out ? HCI_ROLE_MASTER : HCI_ROLE_SLAVE; |
Andrei Emeltchenko | 3161ae1 | 2012-09-27 17:26:11 +0300 | [diff] [blame] | 117 | |
Johan Hedberg | a5c4e30 | 2014-07-16 11:56:07 +0300 | [diff] [blame] | 118 | hcon = hci_conn_add(hdev, AMP_LINK, dst, role); |
Andrei Emeltchenko | 3161ae1 | 2012-09-27 17:26:11 +0300 | [diff] [blame] | 119 | if (!hcon) |
| 120 | return NULL; |
| 121 | |
Andrei Emeltchenko | a0c234f | 2012-10-05 16:56:56 +0300 | [diff] [blame] | 122 | BT_DBG("hcon %p dst %pMR", hcon, dst); |
| 123 | |
Andrei Emeltchenko | 3161ae1 | 2012-09-27 17:26:11 +0300 | [diff] [blame] | 124 | hcon->state = BT_CONNECT; |
Andrei Emeltchenko | 3161ae1 | 2012-09-27 17:26:11 +0300 | [diff] [blame] | 125 | hcon->attempt++; |
| 126 | hcon->handle = __next_handle(mgr); |
| 127 | hcon->remote_id = remote_id; |
Andrei Emeltchenko | f706adf | 2012-10-18 13:16:19 +0300 | [diff] [blame] | 128 | hcon->amp_mgr = amp_mgr_get(mgr); |
Andrei Emeltchenko | 3161ae1 | 2012-09-27 17:26:11 +0300 | [diff] [blame] | 129 | |
| 130 | return hcon; |
| 131 | } |
| 132 | |
Dmitry Kasatkin | ba221bb | 2012-09-27 17:26:17 +0300 | [diff] [blame] | 133 | /* AMP crypto key generation interface */ |
| 134 | static int hmac_sha256(u8 *key, u8 ksize, char *plaintext, u8 psize, u8 *output) |
| 135 | { |
Dmitry Kasatkin | ba221bb | 2012-09-27 17:26:17 +0300 | [diff] [blame] | 136 | struct crypto_shash *tfm; |
Marcel Holtmann | 0a961a4 | 2014-07-20 17:43:07 +0200 | [diff] [blame] | 137 | int ret; |
Dmitry Kasatkin | ba221bb | 2012-09-27 17:26:17 +0300 | [diff] [blame] | 138 | |
| 139 | if (!ksize) |
| 140 | return -EINVAL; |
| 141 | |
| 142 | tfm = crypto_alloc_shash("hmac(sha256)", 0, 0); |
| 143 | if (IS_ERR(tfm)) { |
| 144 | BT_DBG("crypto_alloc_ahash failed: err %ld", PTR_ERR(tfm)); |
| 145 | return PTR_ERR(tfm); |
| 146 | } |
| 147 | |
| 148 | ret = crypto_shash_setkey(tfm, key, ksize); |
| 149 | if (ret) { |
| 150 | BT_DBG("crypto_ahash_setkey failed: err %d", ret); |
| 151 | } else { |
Behan Webster | 9f06a8d | 2014-09-05 16:03:34 -0700 | [diff] [blame] | 152 | char desc[sizeof(struct shash_desc) + |
| 153 | crypto_shash_descsize(tfm)] CRYPTO_MINALIGN_ATTR; |
| 154 | struct shash_desc *shash = (struct shash_desc *)desc; |
Dmitry Kasatkin | ba221bb | 2012-09-27 17:26:17 +0300 | [diff] [blame] | 155 | |
Behan Webster | 9f06a8d | 2014-09-05 16:03:34 -0700 | [diff] [blame] | 156 | shash->tfm = tfm; |
| 157 | shash->flags = CRYPTO_TFM_REQ_MAY_SLEEP; |
Dmitry Kasatkin | ba221bb | 2012-09-27 17:26:17 +0300 | [diff] [blame] | 158 | |
Behan Webster | 9f06a8d | 2014-09-05 16:03:34 -0700 | [diff] [blame] | 159 | ret = crypto_shash_digest(shash, plaintext, psize, |
Dmitry Kasatkin | ba221bb | 2012-09-27 17:26:17 +0300 | [diff] [blame] | 160 | output); |
| 161 | } |
| 162 | |
| 163 | crypto_free_shash(tfm); |
| 164 | return ret; |
| 165 | } |
| 166 | |
Andrei Emeltchenko | 5a34918 | 2012-09-27 17:26:18 +0300 | [diff] [blame] | 167 | int phylink_gen_key(struct hci_conn *conn, u8 *data, u8 *len, u8 *type) |
| 168 | { |
| 169 | struct hci_dev *hdev = conn->hdev; |
| 170 | struct link_key *key; |
| 171 | u8 keybuf[HCI_AMP_LINK_KEY_SIZE]; |
| 172 | u8 gamp_key[HCI_AMP_LINK_KEY_SIZE]; |
| 173 | int err; |
| 174 | |
| 175 | if (!hci_conn_check_link_mode(conn)) |
| 176 | return -EACCES; |
| 177 | |
| 178 | BT_DBG("conn %p key_type %d", conn, conn->key_type); |
| 179 | |
| 180 | /* Legacy key */ |
| 181 | if (conn->key_type < 3) { |
| 182 | BT_ERR("Legacy key type %d", conn->key_type); |
| 183 | return -EACCES; |
| 184 | } |
| 185 | |
| 186 | *type = conn->key_type; |
| 187 | *len = HCI_AMP_LINK_KEY_SIZE; |
| 188 | |
| 189 | key = hci_find_link_key(hdev, &conn->dst); |
Andrei Emeltchenko | 079db0c | 2012-10-05 16:56:53 +0300 | [diff] [blame] | 190 | if (!key) { |
| 191 | BT_DBG("No Link key for conn %p dst %pMR", conn, &conn->dst); |
| 192 | return -EACCES; |
| 193 | } |
Andrei Emeltchenko | 5a34918 | 2012-09-27 17:26:18 +0300 | [diff] [blame] | 194 | |
| 195 | /* BR/EDR Link Key concatenated together with itself */ |
| 196 | memcpy(&keybuf[0], key->val, HCI_LINK_KEY_SIZE); |
| 197 | memcpy(&keybuf[HCI_LINK_KEY_SIZE], key->val, HCI_LINK_KEY_SIZE); |
| 198 | |
| 199 | /* Derive Generic AMP Link Key (gamp) */ |
| 200 | err = hmac_sha256(keybuf, HCI_AMP_LINK_KEY_SIZE, "gamp", 4, gamp_key); |
| 201 | if (err) { |
| 202 | BT_ERR("Could not derive Generic AMP Key: err %d", err); |
| 203 | return err; |
| 204 | } |
| 205 | |
| 206 | if (conn->key_type == HCI_LK_DEBUG_COMBINATION) { |
| 207 | BT_DBG("Use Generic AMP Key (gamp)"); |
| 208 | memcpy(data, gamp_key, HCI_AMP_LINK_KEY_SIZE); |
| 209 | return err; |
| 210 | } |
| 211 | |
| 212 | /* Derive Dedicated AMP Link Key: "802b" is 802.11 PAL keyID */ |
| 213 | return hmac_sha256(gamp_key, HCI_AMP_LINK_KEY_SIZE, "802b", 4, data); |
| 214 | } |
| 215 | |
Andrei Emeltchenko | 903e454 | 2012-09-27 17:26:09 +0300 | [diff] [blame] | 216 | void amp_read_loc_assoc_frag(struct hci_dev *hdev, u8 phy_handle) |
| 217 | { |
| 218 | struct hci_cp_read_local_amp_assoc cp; |
| 219 | struct amp_assoc *loc_assoc = &hdev->loc_assoc; |
| 220 | |
| 221 | BT_DBG("%s handle %d", hdev->name, phy_handle); |
| 222 | |
| 223 | cp.phy_handle = phy_handle; |
| 224 | cp.max_len = cpu_to_le16(hdev->amp_assoc_size); |
| 225 | cp.len_so_far = cpu_to_le16(loc_assoc->offset); |
| 226 | |
| 227 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_ASSOC, sizeof(cp), &cp); |
| 228 | } |
| 229 | |
| 230 | void amp_read_loc_assoc(struct hci_dev *hdev, struct amp_mgr *mgr) |
| 231 | { |
| 232 | struct hci_cp_read_local_amp_assoc cp; |
| 233 | |
| 234 | memset(&hdev->loc_assoc, 0, sizeof(struct amp_assoc)); |
| 235 | memset(&cp, 0, sizeof(cp)); |
| 236 | |
| 237 | cp.max_len = cpu_to_le16(hdev->amp_assoc_size); |
| 238 | |
Andrei Emeltchenko | cb6801c6 | 2012-12-07 14:59:08 +0200 | [diff] [blame] | 239 | set_bit(READ_LOC_AMP_ASSOC, &mgr->state); |
Andrei Emeltchenko | 903e454 | 2012-09-27 17:26:09 +0300 | [diff] [blame] | 240 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_ASSOC, sizeof(cp), &cp); |
| 241 | } |
Andrei Emeltchenko | a02226d | 2012-09-27 17:26:19 +0300 | [diff] [blame] | 242 | |
Andrei Emeltchenko | 9495b2e | 2012-09-27 17:26:22 +0300 | [diff] [blame] | 243 | void amp_read_loc_assoc_final_data(struct hci_dev *hdev, |
| 244 | struct hci_conn *hcon) |
| 245 | { |
| 246 | struct hci_cp_read_local_amp_assoc cp; |
| 247 | struct amp_mgr *mgr = hcon->amp_mgr; |
| 248 | |
| 249 | cp.phy_handle = hcon->handle; |
| 250 | cp.len_so_far = cpu_to_le16(0); |
| 251 | cp.max_len = cpu_to_le16(hdev->amp_assoc_size); |
| 252 | |
Andrei Emeltchenko | cb6801c6 | 2012-12-07 14:59:08 +0200 | [diff] [blame] | 253 | set_bit(READ_LOC_AMP_ASSOC_FINAL, &mgr->state); |
Andrei Emeltchenko | 9495b2e | 2012-09-27 17:26:22 +0300 | [diff] [blame] | 254 | |
| 255 | /* Read Local AMP Assoc final link information data */ |
| 256 | hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_ASSOC, sizeof(cp), &cp); |
| 257 | } |
Andrei Emeltchenko | 93c284e | 2012-09-27 17:26:20 +0300 | [diff] [blame] | 258 | |
| 259 | /* Write AMP Assoc data fragments, returns true with last fragment written*/ |
| 260 | static bool amp_write_rem_assoc_frag(struct hci_dev *hdev, |
| 261 | struct hci_conn *hcon) |
| 262 | { |
| 263 | struct hci_cp_write_remote_amp_assoc *cp; |
| 264 | struct amp_mgr *mgr = hcon->amp_mgr; |
| 265 | struct amp_ctrl *ctrl; |
| 266 | u16 frag_len, len; |
| 267 | |
| 268 | ctrl = amp_ctrl_lookup(mgr, hcon->remote_id); |
| 269 | if (!ctrl) |
| 270 | return false; |
| 271 | |
| 272 | if (!ctrl->assoc_rem_len) { |
| 273 | BT_DBG("all fragments are written"); |
| 274 | ctrl->assoc_rem_len = ctrl->assoc_len; |
| 275 | ctrl->assoc_len_so_far = 0; |
| 276 | |
| 277 | amp_ctrl_put(ctrl); |
| 278 | return true; |
| 279 | } |
| 280 | |
| 281 | frag_len = min_t(u16, 248, ctrl->assoc_rem_len); |
| 282 | len = frag_len + sizeof(*cp); |
| 283 | |
| 284 | cp = kzalloc(len, GFP_KERNEL); |
| 285 | if (!cp) { |
| 286 | amp_ctrl_put(ctrl); |
| 287 | return false; |
| 288 | } |
| 289 | |
| 290 | BT_DBG("hcon %p ctrl %p frag_len %u assoc_len %u rem_len %u", |
| 291 | hcon, ctrl, frag_len, ctrl->assoc_len, ctrl->assoc_rem_len); |
| 292 | |
| 293 | cp->phy_handle = hcon->handle; |
| 294 | cp->len_so_far = cpu_to_le16(ctrl->assoc_len_so_far); |
| 295 | cp->rem_len = cpu_to_le16(ctrl->assoc_rem_len); |
| 296 | memcpy(cp->frag, ctrl->assoc, frag_len); |
| 297 | |
| 298 | ctrl->assoc_len_so_far += frag_len; |
| 299 | ctrl->assoc_rem_len -= frag_len; |
| 300 | |
| 301 | amp_ctrl_put(ctrl); |
| 302 | |
| 303 | hci_send_cmd(hdev, HCI_OP_WRITE_REMOTE_AMP_ASSOC, len, cp); |
| 304 | |
| 305 | kfree(cp); |
| 306 | |
| 307 | return false; |
| 308 | } |
| 309 | |
| 310 | void amp_write_rem_assoc_continue(struct hci_dev *hdev, u8 handle) |
| 311 | { |
| 312 | struct hci_conn *hcon; |
| 313 | |
| 314 | BT_DBG("%s phy handle 0x%2.2x", hdev->name, handle); |
| 315 | |
| 316 | hcon = hci_conn_hash_lookup_handle(hdev, handle); |
| 317 | if (!hcon) |
| 318 | return; |
| 319 | |
Andrei Emeltchenko | 8e05e3b | 2012-12-07 14:59:05 +0200 | [diff] [blame] | 320 | /* Send A2MP create phylink rsp when all fragments are written */ |
| 321 | if (amp_write_rem_assoc_frag(hdev, hcon)) |
| 322 | a2mp_send_create_phy_link_rsp(hdev, 0); |
Andrei Emeltchenko | 93c284e | 2012-09-27 17:26:20 +0300 | [diff] [blame] | 323 | } |
| 324 | |
| 325 | void amp_write_remote_assoc(struct hci_dev *hdev, u8 handle) |
| 326 | { |
| 327 | struct hci_conn *hcon; |
| 328 | |
| 329 | BT_DBG("%s phy handle 0x%2.2x", hdev->name, handle); |
| 330 | |
| 331 | hcon = hci_conn_hash_lookup_handle(hdev, handle); |
| 332 | if (!hcon) |
| 333 | return; |
| 334 | |
| 335 | BT_DBG("%s phy handle 0x%2.2x hcon %p", hdev->name, handle, hcon); |
| 336 | |
| 337 | amp_write_rem_assoc_frag(hdev, hcon); |
| 338 | } |
| 339 | |
Andrei Emeltchenko | a02226d | 2012-09-27 17:26:19 +0300 | [diff] [blame] | 340 | void amp_create_phylink(struct hci_dev *hdev, struct amp_mgr *mgr, |
| 341 | struct hci_conn *hcon) |
| 342 | { |
| 343 | struct hci_cp_create_phy_link cp; |
| 344 | |
| 345 | cp.phy_handle = hcon->handle; |
| 346 | |
| 347 | BT_DBG("%s hcon %p phy handle 0x%2.2x", hdev->name, hcon, |
| 348 | hcon->handle); |
| 349 | |
| 350 | if (phylink_gen_key(mgr->l2cap_conn->hcon, cp.key, &cp.key_len, |
| 351 | &cp.key_type)) { |
| 352 | BT_DBG("Cannot create link key"); |
| 353 | return; |
| 354 | } |
| 355 | |
| 356 | hci_send_cmd(hdev, HCI_OP_CREATE_PHY_LINK, sizeof(cp), &cp); |
| 357 | } |
Andrei Emeltchenko | dffa387 | 2012-09-27 17:26:23 +0300 | [diff] [blame] | 358 | |
| 359 | void amp_accept_phylink(struct hci_dev *hdev, struct amp_mgr *mgr, |
| 360 | struct hci_conn *hcon) |
| 361 | { |
| 362 | struct hci_cp_accept_phy_link cp; |
| 363 | |
| 364 | cp.phy_handle = hcon->handle; |
| 365 | |
| 366 | BT_DBG("%s hcon %p phy handle 0x%2.2x", hdev->name, hcon, |
| 367 | hcon->handle); |
| 368 | |
| 369 | if (phylink_gen_key(mgr->l2cap_conn->hcon, cp.key, &cp.key_len, |
| 370 | &cp.key_type)) { |
| 371 | BT_DBG("Cannot create link key"); |
| 372 | return; |
| 373 | } |
| 374 | |
| 375 | hci_send_cmd(hdev, HCI_OP_ACCEPT_PHY_LINK, sizeof(cp), &cp); |
| 376 | } |
Andrei Emeltchenko | 5ce66b5 | 2012-10-31 15:46:30 +0200 | [diff] [blame] | 377 | |
Andrei Emeltchenko | cf70ff2 | 2012-10-31 15:46:36 +0200 | [diff] [blame] | 378 | void amp_physical_cfm(struct hci_conn *bredr_hcon, struct hci_conn *hs_hcon) |
| 379 | { |
| 380 | struct hci_dev *bredr_hdev = hci_dev_hold(bredr_hcon->hdev); |
| 381 | struct amp_mgr *mgr = hs_hcon->amp_mgr; |
| 382 | struct l2cap_chan *bredr_chan; |
| 383 | |
| 384 | BT_DBG("bredr_hcon %p hs_hcon %p mgr %p", bredr_hcon, hs_hcon, mgr); |
| 385 | |
| 386 | if (!bredr_hdev || !mgr || !mgr->bredr_chan) |
| 387 | return; |
| 388 | |
| 389 | bredr_chan = mgr->bredr_chan; |
| 390 | |
Andrei Emeltchenko | a514b17 | 2012-11-14 17:39:30 +0200 | [diff] [blame] | 391 | l2cap_chan_lock(bredr_chan); |
| 392 | |
Andrei Emeltchenko | cf70ff2 | 2012-10-31 15:46:36 +0200 | [diff] [blame] | 393 | set_bit(FLAG_EFS_ENABLE, &bredr_chan->flags); |
Andrei Emeltchenko | fffadc0 | 2012-11-01 15:37:03 +0200 | [diff] [blame] | 394 | bredr_chan->remote_amp_id = hs_hcon->remote_id; |
Andrei Emeltchenko | 3729599 | 2012-11-20 17:16:20 +0200 | [diff] [blame] | 395 | bredr_chan->local_amp_id = hs_hcon->hdev->id; |
Andrei Emeltchenko | cf70ff2 | 2012-10-31 15:46:36 +0200 | [diff] [blame] | 396 | bredr_chan->hs_hcon = hs_hcon; |
| 397 | bredr_chan->conn->mtu = hs_hcon->hdev->block_mtu; |
Andrei Emeltchenko | cf70ff2 | 2012-10-31 15:46:36 +0200 | [diff] [blame] | 398 | |
Andrei Emeltchenko | a514b17 | 2012-11-14 17:39:30 +0200 | [diff] [blame] | 399 | __l2cap_physical_cfm(bredr_chan, 0); |
| 400 | |
| 401 | l2cap_chan_unlock(bredr_chan); |
Andrei Emeltchenko | cf70ff2 | 2012-10-31 15:46:36 +0200 | [diff] [blame] | 402 | |
| 403 | hci_dev_put(bredr_hdev); |
| 404 | } |
| 405 | |
Andrei Emeltchenko | 5ce66b5 | 2012-10-31 15:46:30 +0200 | [diff] [blame] | 406 | void amp_create_logical_link(struct l2cap_chan *chan) |
| 407 | { |
Andrei Emeltchenko | 7a9898c | 2012-12-07 14:59:06 +0200 | [diff] [blame] | 408 | struct hci_conn *hs_hcon = chan->hs_hcon; |
Andrei Emeltchenko | 5ce66b5 | 2012-10-31 15:46:30 +0200 | [diff] [blame] | 409 | struct hci_cp_create_accept_logical_link cp; |
Andrei Emeltchenko | 5ce66b5 | 2012-10-31 15:46:30 +0200 | [diff] [blame] | 410 | struct hci_dev *hdev; |
| 411 | |
Marcel Holtmann | bdc8ead2 | 2013-10-13 02:23:38 -0700 | [diff] [blame] | 412 | BT_DBG("chan %p hs_hcon %p dst %pMR", chan, hs_hcon, |
| 413 | &chan->conn->hcon->dst); |
Andrei Emeltchenko | 5ce66b5 | 2012-10-31 15:46:30 +0200 | [diff] [blame] | 414 | |
Andrei Emeltchenko | 7a9898c | 2012-12-07 14:59:06 +0200 | [diff] [blame] | 415 | if (!hs_hcon) |
Andrei Emeltchenko | 5ce66b5 | 2012-10-31 15:46:30 +0200 | [diff] [blame] | 416 | return; |
| 417 | |
| 418 | hdev = hci_dev_hold(chan->hs_hcon->hdev); |
| 419 | if (!hdev) |
| 420 | return; |
| 421 | |
Andrei Emeltchenko | 7a9898c | 2012-12-07 14:59:06 +0200 | [diff] [blame] | 422 | cp.phy_handle = hs_hcon->handle; |
Andrei Emeltchenko | 5ce66b5 | 2012-10-31 15:46:30 +0200 | [diff] [blame] | 423 | |
| 424 | cp.tx_flow_spec.id = chan->local_id; |
| 425 | cp.tx_flow_spec.stype = chan->local_stype; |
| 426 | cp.tx_flow_spec.msdu = cpu_to_le16(chan->local_msdu); |
| 427 | cp.tx_flow_spec.sdu_itime = cpu_to_le32(chan->local_sdu_itime); |
| 428 | cp.tx_flow_spec.acc_lat = cpu_to_le32(chan->local_acc_lat); |
| 429 | cp.tx_flow_spec.flush_to = cpu_to_le32(chan->local_flush_to); |
| 430 | |
| 431 | cp.rx_flow_spec.id = chan->remote_id; |
| 432 | cp.rx_flow_spec.stype = chan->remote_stype; |
| 433 | cp.rx_flow_spec.msdu = cpu_to_le16(chan->remote_msdu); |
| 434 | cp.rx_flow_spec.sdu_itime = cpu_to_le32(chan->remote_sdu_itime); |
| 435 | cp.rx_flow_spec.acc_lat = cpu_to_le32(chan->remote_acc_lat); |
| 436 | cp.rx_flow_spec.flush_to = cpu_to_le32(chan->remote_flush_to); |
| 437 | |
Andrei Emeltchenko | 7a9898c | 2012-12-07 14:59:06 +0200 | [diff] [blame] | 438 | if (hs_hcon->out) |
Andrei Emeltchenko | 5ce66b5 | 2012-10-31 15:46:30 +0200 | [diff] [blame] | 439 | hci_send_cmd(hdev, HCI_OP_CREATE_LOGICAL_LINK, sizeof(cp), |
| 440 | &cp); |
| 441 | else |
| 442 | hci_send_cmd(hdev, HCI_OP_ACCEPT_LOGICAL_LINK, sizeof(cp), |
| 443 | &cp); |
| 444 | |
Andrei Emeltchenko | 5ce66b5 | 2012-10-31 15:46:30 +0200 | [diff] [blame] | 445 | hci_dev_put(hdev); |
| 446 | } |
Andrei Emeltchenko | 606e2a1 | 2012-10-31 15:46:31 +0200 | [diff] [blame] | 447 | |
Andrei Emeltchenko | 419e08c | 2012-10-31 15:46:34 +0200 | [diff] [blame] | 448 | void amp_disconnect_logical_link(struct hci_chan *hchan) |
| 449 | { |
| 450 | struct hci_conn *hcon = hchan->conn; |
| 451 | struct hci_cp_disconn_logical_link cp; |
| 452 | |
| 453 | if (hcon->state != BT_CONNECTED) { |
| 454 | BT_DBG("hchan %p not connected", hchan); |
| 455 | return; |
| 456 | } |
| 457 | |
| 458 | cp.log_handle = cpu_to_le16(hchan->handle); |
| 459 | hci_send_cmd(hcon->hdev, HCI_OP_DISCONN_LOGICAL_LINK, sizeof(cp), &cp); |
| 460 | } |
| 461 | |
Andrei Emeltchenko | 606e2a1 | 2012-10-31 15:46:31 +0200 | [diff] [blame] | 462 | void amp_destroy_logical_link(struct hci_chan *hchan, u8 reason) |
| 463 | { |
| 464 | BT_DBG("hchan %p", hchan); |
| 465 | |
| 466 | hci_chan_del(hchan); |
| 467 | } |