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-rw-r--r--net/bluetooth/a2mp.c1054
1 files changed, 0 insertions, 1054 deletions
diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
deleted file mode 100644
index e7adb8a98c..0000000000
--- a/net/bluetooth/a2mp.c
+++ /dev/null
@@ -1,1054 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- Copyright (c) 2010,2011 Code Aurora Forum. All rights reserved.
- Copyright (c) 2011,2012 Intel Corp.
-
-*/
-
-#include <net/bluetooth/bluetooth.h>
-#include <net/bluetooth/hci_core.h>
-#include <net/bluetooth/l2cap.h>
-
-#include "hci_request.h"
-#include "a2mp.h"
-#include "amp.h"
-
-#define A2MP_FEAT_EXT 0x8000
-
-/* Global AMP Manager list */
-static LIST_HEAD(amp_mgr_list);
-static DEFINE_MUTEX(amp_mgr_list_lock);
-
-/* A2MP build & send command helper functions */
-static struct a2mp_cmd *__a2mp_build(u8 code, u8 ident, u16 len, void *data)
-{
- struct a2mp_cmd *cmd;
- int plen;
-
- plen = sizeof(*cmd) + len;
- cmd = kzalloc(plen, GFP_KERNEL);
- if (!cmd)
- return NULL;
-
- cmd->code = code;
- cmd->ident = ident;
- cmd->len = cpu_to_le16(len);
-
- memcpy(cmd->data, data, len);
-
- return cmd;
-}
-
-static void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data)
-{
- struct l2cap_chan *chan = mgr->a2mp_chan;
- struct a2mp_cmd *cmd;
- u16 total_len = len + sizeof(*cmd);
- struct kvec iv;
- struct msghdr msg;
-
- cmd = __a2mp_build(code, ident, len, data);
- if (!cmd)
- return;
-
- iv.iov_base = cmd;
- iv.iov_len = total_len;
-
- memset(&msg, 0, sizeof(msg));
-
- iov_iter_kvec(&msg.msg_iter, ITER_SOURCE, &iv, 1, total_len);
-
- l2cap_chan_send(chan, &msg, total_len);
-
- kfree(cmd);
-}
-
-static u8 __next_ident(struct amp_mgr *mgr)
-{
- if (++mgr->ident == 0)
- mgr->ident = 1;
-
- return mgr->ident;
-}
-
-static struct amp_mgr *amp_mgr_lookup_by_state(u8 state)
-{
- struct amp_mgr *mgr;
-
- mutex_lock(&amp_mgr_list_lock);
- list_for_each_entry(mgr, &amp_mgr_list, list) {
- if (test_and_clear_bit(state, &mgr->state)) {
- amp_mgr_get(mgr);
- mutex_unlock(&amp_mgr_list_lock);
- return mgr;
- }
- }
- mutex_unlock(&amp_mgr_list_lock);
-
- return NULL;
-}
-
-/* hci_dev_list shall be locked */
-static void __a2mp_add_cl(struct amp_mgr *mgr, struct a2mp_cl *cl)
-{
- struct hci_dev *hdev;
- int i = 1;
-
- cl[0].id = AMP_ID_BREDR;
- cl[0].type = AMP_TYPE_BREDR;
- cl[0].status = AMP_STATUS_BLUETOOTH_ONLY;
-
- list_for_each_entry(hdev, &hci_dev_list, list) {
- if (hdev->dev_type == HCI_AMP) {
- cl[i].id = hdev->id;
- cl[i].type = hdev->amp_type;
- if (test_bit(HCI_UP, &hdev->flags))
- cl[i].status = hdev->amp_status;
- else
- cl[i].status = AMP_STATUS_POWERED_DOWN;
- i++;
- }
- }
-}
-
-/* Processing A2MP messages */
-static int a2mp_command_rej(struct amp_mgr *mgr, struct sk_buff *skb,
- struct a2mp_cmd *hdr)
-{
- struct a2mp_cmd_rej *rej = (void *) skb->data;
-
- if (le16_to_cpu(hdr->len) < sizeof(*rej))
- return -EINVAL;
-
- BT_DBG("ident %u reason %d", hdr->ident, le16_to_cpu(rej->reason));
-
- skb_pull(skb, sizeof(*rej));
-
- return 0;
-}
-
-static int a2mp_discover_req(struct amp_mgr *mgr, struct sk_buff *skb,
- struct a2mp_cmd *hdr)
-{
- struct a2mp_discov_req *req = (void *) skb->data;
- u16 len = le16_to_cpu(hdr->len);
- struct a2mp_discov_rsp *rsp;
- u16 ext_feat;
- u8 num_ctrl;
- struct hci_dev *hdev;
-
- if (len < sizeof(*req))
- return -EINVAL;
-
- skb_pull(skb, sizeof(*req));
-
- ext_feat = le16_to_cpu(req->ext_feat);
-
- BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(req->mtu), ext_feat);
-
- /* check that packet is not broken for now */
- while (ext_feat & A2MP_FEAT_EXT) {
- if (len < sizeof(ext_feat))
- return -EINVAL;
-
- ext_feat = get_unaligned_le16(skb->data);
- BT_DBG("efm 0x%4.4x", ext_feat);
- len -= sizeof(ext_feat);
- skb_pull(skb, sizeof(ext_feat));
- }
-
- read_lock(&hci_dev_list_lock);
-
- /* at minimum the BR/EDR needs to be listed */
- num_ctrl = 1;
-
- list_for_each_entry(hdev, &hci_dev_list, list) {
- if (hdev->dev_type == HCI_AMP)
- num_ctrl++;
- }
-
- len = struct_size(rsp, cl, num_ctrl);
- rsp = kmalloc(len, GFP_ATOMIC);
- if (!rsp) {
- read_unlock(&hci_dev_list_lock);
- return -ENOMEM;
- }
-
- rsp->mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
- rsp->ext_feat = 0;
-
- __a2mp_add_cl(mgr, rsp->cl);
-
- read_unlock(&hci_dev_list_lock);
-
- a2mp_send(mgr, A2MP_DISCOVER_RSP, hdr->ident, len, rsp);
-
- kfree(rsp);
- return 0;
-}
-
-static int a2mp_discover_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
- struct a2mp_cmd *hdr)
-{
- struct a2mp_discov_rsp *rsp = (void *) skb->data;
- u16 len = le16_to_cpu(hdr->len);
- struct a2mp_cl *cl;
- u16 ext_feat;
- bool found = false;
-
- if (len < sizeof(*rsp))
- return -EINVAL;
-
- len -= sizeof(*rsp);
- skb_pull(skb, sizeof(*rsp));
-
- ext_feat = le16_to_cpu(rsp->ext_feat);
-
- BT_DBG("mtu %d efm 0x%4.4x", le16_to_cpu(rsp->mtu), ext_feat);
-
- /* check that packet is not broken for now */
- while (ext_feat & A2MP_FEAT_EXT) {
- if (len < sizeof(ext_feat))
- return -EINVAL;
-
- ext_feat = get_unaligned_le16(skb->data);
- BT_DBG("efm 0x%4.4x", ext_feat);
- len -= sizeof(ext_feat);
- skb_pull(skb, sizeof(ext_feat));
- }
-
- cl = (void *) skb->data;
- while (len >= sizeof(*cl)) {
- BT_DBG("Remote AMP id %u type %u status %u", cl->id, cl->type,
- cl->status);
-
- if (cl->id != AMP_ID_BREDR && cl->type != AMP_TYPE_BREDR) {
- struct a2mp_info_req req;
-
- found = true;
-
- memset(&req, 0, sizeof(req));
-
- req.id = cl->id;
- a2mp_send(mgr, A2MP_GETINFO_REQ, __next_ident(mgr),
- sizeof(req), &req);
- }
-
- len -= sizeof(*cl);
- cl = skb_pull(skb, sizeof(*cl));
- }
-
- /* Fall back to L2CAP init sequence */
- if (!found) {
- struct l2cap_conn *conn = mgr->l2cap_conn;
- struct l2cap_chan *chan;
-
- mutex_lock(&conn->chan_lock);
-
- list_for_each_entry(chan, &conn->chan_l, list) {
-
- BT_DBG("chan %p state %s", chan,
- state_to_string(chan->state));
-
- if (chan->scid == L2CAP_CID_A2MP)
- continue;
-
- l2cap_chan_lock(chan);
-
- if (chan->state == BT_CONNECT)
- l2cap_send_conn_req(chan);
-
- l2cap_chan_unlock(chan);
- }
-
- mutex_unlock(&conn->chan_lock);
- }
-
- return 0;
-}
-
-static int a2mp_change_notify(struct amp_mgr *mgr, struct sk_buff *skb,
- struct a2mp_cmd *hdr)
-{
- struct a2mp_cl *cl = (void *) skb->data;
-
- while (skb->len >= sizeof(*cl)) {
- BT_DBG("Controller id %u type %u status %u", cl->id, cl->type,
- cl->status);
- cl = skb_pull(skb, sizeof(*cl));
- }
-
- /* TODO send A2MP_CHANGE_RSP */
-
- return 0;
-}
-
-static void read_local_amp_info_complete(struct hci_dev *hdev, u8 status,
- u16 opcode)
-{
- BT_DBG("%s status 0x%2.2x", hdev->name, status);
-
- a2mp_send_getinfo_rsp(hdev);
-}
-
-static int a2mp_getinfo_req(struct amp_mgr *mgr, struct sk_buff *skb,
- struct a2mp_cmd *hdr)
-{
- struct a2mp_info_req *req = (void *) skb->data;
- struct hci_dev *hdev;
- struct hci_request hreq;
- int err = 0;
-
- if (le16_to_cpu(hdr->len) < sizeof(*req))
- return -EINVAL;
-
- BT_DBG("id %u", req->id);
-
- hdev = hci_dev_get(req->id);
- if (!hdev || hdev->dev_type != HCI_AMP) {
- struct a2mp_info_rsp rsp;
-
- memset(&rsp, 0, sizeof(rsp));
-
- rsp.id = req->id;
- rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
-
- a2mp_send(mgr, A2MP_GETINFO_RSP, hdr->ident, sizeof(rsp),
- &rsp);
-
- goto done;
- }
-
- set_bit(READ_LOC_AMP_INFO, &mgr->state);
- hci_req_init(&hreq, hdev);
- hci_req_add(&hreq, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
- err = hci_req_run(&hreq, read_local_amp_info_complete);
- if (err < 0)
- a2mp_send_getinfo_rsp(hdev);
-
-done:
- if (hdev)
- hci_dev_put(hdev);
-
- skb_pull(skb, sizeof(*req));
- return 0;
-}
-
-static int a2mp_getinfo_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
- struct a2mp_cmd *hdr)
-{
- struct a2mp_info_rsp *rsp = (struct a2mp_info_rsp *) skb->data;
- struct a2mp_amp_assoc_req req;
- struct amp_ctrl *ctrl;
-
- if (le16_to_cpu(hdr->len) < sizeof(*rsp))
- return -EINVAL;
-
- BT_DBG("id %u status 0x%2.2x", rsp->id, rsp->status);
-
- if (rsp->status)
- return -EINVAL;
-
- ctrl = amp_ctrl_add(mgr, rsp->id);
- if (!ctrl)
- return -ENOMEM;
-
- memset(&req, 0, sizeof(req));
-
- req.id = rsp->id;
- a2mp_send(mgr, A2MP_GETAMPASSOC_REQ, __next_ident(mgr), sizeof(req),
- &req);
-
- skb_pull(skb, sizeof(*rsp));
- return 0;
-}
-
-static int a2mp_getampassoc_req(struct amp_mgr *mgr, struct sk_buff *skb,
- struct a2mp_cmd *hdr)
-{
- struct a2mp_amp_assoc_req *req = (void *) skb->data;
- struct hci_dev *hdev;
- struct amp_mgr *tmp;
-
- if (le16_to_cpu(hdr->len) < sizeof(*req))
- return -EINVAL;
-
- BT_DBG("id %u", req->id);
-
- /* Make sure that other request is not processed */
- tmp = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
-
- hdev = hci_dev_get(req->id);
- if (!hdev || hdev->amp_type == AMP_TYPE_BREDR || tmp) {
- struct a2mp_amp_assoc_rsp rsp;
-
- memset(&rsp, 0, sizeof(rsp));
- rsp.id = req->id;
-
- if (tmp) {
- rsp.status = A2MP_STATUS_COLLISION_OCCURED;
- amp_mgr_put(tmp);
- } else {
- rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
- }
-
- a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, hdr->ident, sizeof(rsp),
- &rsp);
-
- goto done;
- }
-
- amp_read_loc_assoc(hdev, mgr);
-
-done:
- if (hdev)
- hci_dev_put(hdev);
-
- skb_pull(skb, sizeof(*req));
- return 0;
-}
-
-static int a2mp_getampassoc_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
- struct a2mp_cmd *hdr)
-{
- struct a2mp_amp_assoc_rsp *rsp = (void *) skb->data;
- u16 len = le16_to_cpu(hdr->len);
- struct hci_dev *hdev;
- struct amp_ctrl *ctrl;
- struct hci_conn *hcon;
- size_t assoc_len;
-
- if (len < sizeof(*rsp))
- return -EINVAL;
-
- assoc_len = len - sizeof(*rsp);
-
- BT_DBG("id %u status 0x%2.2x assoc len %zu", rsp->id, rsp->status,
- assoc_len);
-
- if (rsp->status)
- return -EINVAL;
-
- /* Save remote ASSOC data */
- ctrl = amp_ctrl_lookup(mgr, rsp->id);
- if (ctrl) {
- u8 *assoc;
-
- assoc = kmemdup(rsp->amp_assoc, assoc_len, GFP_KERNEL);
- if (!assoc) {
- amp_ctrl_put(ctrl);
- return -ENOMEM;
- }
-
- ctrl->assoc = assoc;
- ctrl->assoc_len = assoc_len;
- ctrl->assoc_rem_len = assoc_len;
- ctrl->assoc_len_so_far = 0;
-
- amp_ctrl_put(ctrl);
- }
-
- /* Create Phys Link */
- hdev = hci_dev_get(rsp->id);
- if (!hdev)
- return -EINVAL;
-
- hcon = phylink_add(hdev, mgr, rsp->id, true);
- if (!hcon)
- goto done;
-
- BT_DBG("Created hcon %p: loc:%u -> rem:%u", hcon, hdev->id, rsp->id);
-
- mgr->bredr_chan->remote_amp_id = rsp->id;
-
- amp_create_phylink(hdev, mgr, hcon);
-
-done:
- hci_dev_put(hdev);
- skb_pull(skb, len);
- return 0;
-}
-
-static int a2mp_createphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
- struct a2mp_cmd *hdr)
-{
- struct a2mp_physlink_req *req = (void *) skb->data;
- struct a2mp_physlink_rsp rsp;
- struct hci_dev *hdev;
- struct hci_conn *hcon;
- struct amp_ctrl *ctrl;
-
- if (le16_to_cpu(hdr->len) < sizeof(*req))
- return -EINVAL;
-
- BT_DBG("local_id %u, remote_id %u", req->local_id, req->remote_id);
-
- memset(&rsp, 0, sizeof(rsp));
-
- rsp.local_id = req->remote_id;
- rsp.remote_id = req->local_id;
-
- hdev = hci_dev_get(req->remote_id);
- if (!hdev || hdev->amp_type == AMP_TYPE_BREDR) {
- rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
- goto send_rsp;
- }
-
- ctrl = amp_ctrl_lookup(mgr, rsp.remote_id);
- if (!ctrl) {
- ctrl = amp_ctrl_add(mgr, rsp.remote_id);
- if (ctrl) {
- amp_ctrl_get(ctrl);
- } else {
- rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
- goto send_rsp;
- }
- }
-
- if (ctrl) {
- size_t assoc_len = le16_to_cpu(hdr->len) - sizeof(*req);
- u8 *assoc;
-
- assoc = kmemdup(req->amp_assoc, assoc_len, GFP_KERNEL);
- if (!assoc) {
- amp_ctrl_put(ctrl);
- hci_dev_put(hdev);
- return -ENOMEM;
- }
-
- ctrl->assoc = assoc;
- ctrl->assoc_len = assoc_len;
- ctrl->assoc_rem_len = assoc_len;
- ctrl->assoc_len_so_far = 0;
-
- amp_ctrl_put(ctrl);
- }
-
- hcon = phylink_add(hdev, mgr, req->local_id, false);
- if (hcon) {
- amp_accept_phylink(hdev, mgr, hcon);
- rsp.status = A2MP_STATUS_SUCCESS;
- } else {
- rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
- }
-
-send_rsp:
- if (hdev)
- hci_dev_put(hdev);
-
- /* Reply error now and success after HCI Write Remote AMP Assoc
- command complete with success status
- */
- if (rsp.status != A2MP_STATUS_SUCCESS) {
- a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, hdr->ident,
- sizeof(rsp), &rsp);
- } else {
- set_bit(WRITE_REMOTE_AMP_ASSOC, &mgr->state);
- mgr->ident = hdr->ident;
- }
-
- skb_pull(skb, le16_to_cpu(hdr->len));
- return 0;
-}
-
-static int a2mp_discphyslink_req(struct amp_mgr *mgr, struct sk_buff *skb,
- struct a2mp_cmd *hdr)
-{
- struct a2mp_physlink_req *req = (void *) skb->data;
- struct a2mp_physlink_rsp rsp;
- struct hci_dev *hdev;
- struct hci_conn *hcon;
-
- if (le16_to_cpu(hdr->len) < sizeof(*req))
- return -EINVAL;
-
- BT_DBG("local_id %u remote_id %u", req->local_id, req->remote_id);
-
- memset(&rsp, 0, sizeof(rsp));
-
- rsp.local_id = req->remote_id;
- rsp.remote_id = req->local_id;
- rsp.status = A2MP_STATUS_SUCCESS;
-
- hdev = hci_dev_get(req->remote_id);
- if (!hdev) {
- rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
- goto send_rsp;
- }
-
- hcon = hci_conn_hash_lookup_ba(hdev, AMP_LINK,
- &mgr->l2cap_conn->hcon->dst);
- if (!hcon) {
- bt_dev_err(hdev, "no phys link exist");
- rsp.status = A2MP_STATUS_NO_PHYSICAL_LINK_EXISTS;
- goto clean;
- }
-
- /* TODO Disconnect Phys Link here */
-
-clean:
- hci_dev_put(hdev);
-
-send_rsp:
- a2mp_send(mgr, A2MP_DISCONNPHYSLINK_RSP, hdr->ident, sizeof(rsp), &rsp);
-
- skb_pull(skb, sizeof(*req));
- return 0;
-}
-
-static inline int a2mp_cmd_rsp(struct amp_mgr *mgr, struct sk_buff *skb,
- struct a2mp_cmd *hdr)
-{
- BT_DBG("ident %u code 0x%2.2x", hdr->ident, hdr->code);
-
- skb_pull(skb, le16_to_cpu(hdr->len));
- return 0;
-}
-
-/* Handle A2MP signalling */
-static int a2mp_chan_recv_cb(struct l2cap_chan *chan, struct sk_buff *skb)
-{
- struct a2mp_cmd *hdr;
- struct amp_mgr *mgr = chan->data;
- int err = 0;
-
- amp_mgr_get(mgr);
-
- while (skb->len >= sizeof(*hdr)) {
- u16 len;
-
- hdr = (void *) skb->data;
- len = le16_to_cpu(hdr->len);
-
- BT_DBG("code 0x%2.2x id %u len %u", hdr->code, hdr->ident, len);
-
- skb_pull(skb, sizeof(*hdr));
-
- if (len > skb->len || !hdr->ident) {
- err = -EINVAL;
- break;
- }
-
- mgr->ident = hdr->ident;
-
- switch (hdr->code) {
- case A2MP_COMMAND_REJ:
- a2mp_command_rej(mgr, skb, hdr);
- break;
-
- case A2MP_DISCOVER_REQ:
- err = a2mp_discover_req(mgr, skb, hdr);
- break;
-
- case A2MP_CHANGE_NOTIFY:
- err = a2mp_change_notify(mgr, skb, hdr);
- break;
-
- case A2MP_GETINFO_REQ:
- err = a2mp_getinfo_req(mgr, skb, hdr);
- break;
-
- case A2MP_GETAMPASSOC_REQ:
- err = a2mp_getampassoc_req(mgr, skb, hdr);
- break;
-
- case A2MP_CREATEPHYSLINK_REQ:
- err = a2mp_createphyslink_req(mgr, skb, hdr);
- break;
-
- case A2MP_DISCONNPHYSLINK_REQ:
- err = a2mp_discphyslink_req(mgr, skb, hdr);
- break;
-
- case A2MP_DISCOVER_RSP:
- err = a2mp_discover_rsp(mgr, skb, hdr);
- break;
-
- case A2MP_GETINFO_RSP:
- err = a2mp_getinfo_rsp(mgr, skb, hdr);
- break;
-
- case A2MP_GETAMPASSOC_RSP:
- err = a2mp_getampassoc_rsp(mgr, skb, hdr);
- break;
-
- case A2MP_CHANGE_RSP:
- case A2MP_CREATEPHYSLINK_RSP:
- case A2MP_DISCONNPHYSLINK_RSP:
- err = a2mp_cmd_rsp(mgr, skb, hdr);
- break;
-
- default:
- BT_ERR("Unknown A2MP sig cmd 0x%2.2x", hdr->code);
- err = -EINVAL;
- break;
- }
- }
-
- if (err) {
- struct a2mp_cmd_rej rej;
-
- memset(&rej, 0, sizeof(rej));
-
- rej.reason = cpu_to_le16(0);
- hdr = (void *) skb->data;
-
- BT_DBG("Send A2MP Rej: cmd 0x%2.2x err %d", hdr->code, err);
-
- a2mp_send(mgr, A2MP_COMMAND_REJ, hdr->ident, sizeof(rej),
- &rej);
- }
-
- /* Always free skb and return success error code to prevent
- from sending L2CAP Disconnect over A2MP channel */
- kfree_skb(skb);
-
- amp_mgr_put(mgr);
-
- return 0;
-}
-
-static void a2mp_chan_close_cb(struct l2cap_chan *chan)
-{
- l2cap_chan_put(chan);
-}
-
-static void a2mp_chan_state_change_cb(struct l2cap_chan *chan, int state,
- int err)
-{
- struct amp_mgr *mgr = chan->data;
-
- if (!mgr)
- return;
-
- BT_DBG("chan %p state %s", chan, state_to_string(state));
-
- chan->state = state;
-
- switch (state) {
- case BT_CLOSED:
- if (mgr)
- amp_mgr_put(mgr);
- break;
- }
-}
-
-static struct sk_buff *a2mp_chan_alloc_skb_cb(struct l2cap_chan *chan,
- unsigned long hdr_len,
- unsigned long len, int nb)
-{
- struct sk_buff *skb;
-
- skb = bt_skb_alloc(hdr_len + len, GFP_KERNEL);
- if (!skb)
- return ERR_PTR(-ENOMEM);
-
- return skb;
-}
-
-static const struct l2cap_ops a2mp_chan_ops = {
- .name = "L2CAP A2MP channel",
- .recv = a2mp_chan_recv_cb,
- .close = a2mp_chan_close_cb,
- .state_change = a2mp_chan_state_change_cb,
- .alloc_skb = a2mp_chan_alloc_skb_cb,
-
- /* Not implemented for A2MP */
- .new_connection = l2cap_chan_no_new_connection,
- .teardown = l2cap_chan_no_teardown,
- .ready = l2cap_chan_no_ready,
- .defer = l2cap_chan_no_defer,
- .resume = l2cap_chan_no_resume,
- .set_shutdown = l2cap_chan_no_set_shutdown,
- .get_sndtimeo = l2cap_chan_no_get_sndtimeo,
-};
-
-static struct l2cap_chan *a2mp_chan_open(struct l2cap_conn *conn, bool locked)
-{
- struct l2cap_chan *chan;
- int err;
-
- chan = l2cap_chan_create();
- if (!chan)
- return NULL;
-
- BT_DBG("chan %p", chan);
-
- chan->chan_type = L2CAP_CHAN_FIXED;
- chan->scid = L2CAP_CID_A2MP;
- chan->dcid = L2CAP_CID_A2MP;
- chan->omtu = L2CAP_A2MP_DEFAULT_MTU;
- chan->imtu = L2CAP_A2MP_DEFAULT_MTU;
- chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
-
- chan->ops = &a2mp_chan_ops;
-
- l2cap_chan_set_defaults(chan);
- chan->remote_max_tx = chan->max_tx;
- chan->remote_tx_win = chan->tx_win;
-
- chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
- chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
-
- skb_queue_head_init(&chan->tx_q);
-
- chan->mode = L2CAP_MODE_ERTM;
-
- err = l2cap_ertm_init(chan);
- if (err < 0) {
- l2cap_chan_del(chan, 0);
- return NULL;
- }
-
- chan->conf_state = 0;
-
- if (locked)
- __l2cap_chan_add(conn, chan);
- else
- l2cap_chan_add(conn, chan);
-
- chan->remote_mps = chan->omtu;
- chan->mps = chan->omtu;
-
- chan->state = BT_CONNECTED;
-
- return chan;
-}
-
-/* AMP Manager functions */
-struct amp_mgr *amp_mgr_get(struct amp_mgr *mgr)
-{
- BT_DBG("mgr %p orig refcnt %d", mgr, kref_read(&mgr->kref));
-
- kref_get(&mgr->kref);
-
- return mgr;
-}
-
-static void amp_mgr_destroy(struct kref *kref)
-{
- struct amp_mgr *mgr = container_of(kref, struct amp_mgr, kref);
-
- BT_DBG("mgr %p", mgr);
-
- mutex_lock(&amp_mgr_list_lock);
- list_del(&mgr->list);
- mutex_unlock(&amp_mgr_list_lock);
-
- amp_ctrl_list_flush(mgr);
- kfree(mgr);
-}
-
-int amp_mgr_put(struct amp_mgr *mgr)
-{
- BT_DBG("mgr %p orig refcnt %d", mgr, kref_read(&mgr->kref));
-
- return kref_put(&mgr->kref, &amp_mgr_destroy);
-}
-
-static struct amp_mgr *amp_mgr_create(struct l2cap_conn *conn, bool locked)
-{
- struct amp_mgr *mgr;
- struct l2cap_chan *chan;
-
- mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
- if (!mgr)
- return NULL;
-
- BT_DBG("conn %p mgr %p", conn, mgr);
-
- mgr->l2cap_conn = conn;
-
- chan = a2mp_chan_open(conn, locked);
- if (!chan) {
- kfree(mgr);
- return NULL;
- }
-
- mgr->a2mp_chan = chan;
- chan->data = mgr;
-
- conn->hcon->amp_mgr = mgr;
-
- kref_init(&mgr->kref);
-
- /* Remote AMP ctrl list initialization */
- INIT_LIST_HEAD(&mgr->amp_ctrls);
- mutex_init(&mgr->amp_ctrls_lock);
-
- mutex_lock(&amp_mgr_list_lock);
- list_add(&mgr->list, &amp_mgr_list);
- mutex_unlock(&amp_mgr_list_lock);
-
- return mgr;
-}
-
-struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
- struct sk_buff *skb)
-{
- struct amp_mgr *mgr;
-
- if (conn->hcon->type != ACL_LINK)
- return NULL;
-
- mgr = amp_mgr_create(conn, false);
- if (!mgr) {
- BT_ERR("Could not create AMP manager");
- return NULL;
- }
-
- BT_DBG("mgr: %p chan %p", mgr, mgr->a2mp_chan);
-
- return mgr->a2mp_chan;
-}
-
-void a2mp_send_getinfo_rsp(struct hci_dev *hdev)
-{
- struct amp_mgr *mgr;
- struct a2mp_info_rsp rsp;
-
- mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_INFO);
- if (!mgr)
- return;
-
- BT_DBG("%s mgr %p", hdev->name, mgr);
-
- memset(&rsp, 0, sizeof(rsp));
-
- rsp.id = hdev->id;
- rsp.status = A2MP_STATUS_INVALID_CTRL_ID;
-
- if (hdev->amp_type != AMP_TYPE_BREDR) {
- rsp.status = 0;
- rsp.total_bw = cpu_to_le32(hdev->amp_total_bw);
- rsp.max_bw = cpu_to_le32(hdev->amp_max_bw);
- rsp.min_latency = cpu_to_le32(hdev->amp_min_latency);
- rsp.pal_cap = cpu_to_le16(hdev->amp_pal_cap);
- rsp.assoc_size = cpu_to_le16(hdev->amp_assoc_size);
- }
-
- a2mp_send(mgr, A2MP_GETINFO_RSP, mgr->ident, sizeof(rsp), &rsp);
- amp_mgr_put(mgr);
-}
-
-void a2mp_send_getampassoc_rsp(struct hci_dev *hdev, u8 status)
-{
- struct amp_mgr *mgr;
- struct amp_assoc *loc_assoc = &hdev->loc_assoc;
- struct a2mp_amp_assoc_rsp *rsp;
- size_t len;
-
- mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC);
- if (!mgr)
- return;
-
- BT_DBG("%s mgr %p", hdev->name, mgr);
-
- len = sizeof(struct a2mp_amp_assoc_rsp) + loc_assoc->len;
- rsp = kzalloc(len, GFP_KERNEL);
- if (!rsp) {
- amp_mgr_put(mgr);
- return;
- }
-
- rsp->id = hdev->id;
-
- if (status) {
- rsp->status = A2MP_STATUS_INVALID_CTRL_ID;
- } else {
- rsp->status = A2MP_STATUS_SUCCESS;
- memcpy(rsp->amp_assoc, loc_assoc->data, loc_assoc->len);
- }
-
- a2mp_send(mgr, A2MP_GETAMPASSOC_RSP, mgr->ident, len, rsp);
- amp_mgr_put(mgr);
- kfree(rsp);
-}
-
-void a2mp_send_create_phy_link_req(struct hci_dev *hdev, u8 status)
-{
- struct amp_mgr *mgr;
- struct amp_assoc *loc_assoc = &hdev->loc_assoc;
- struct a2mp_physlink_req *req;
- struct l2cap_chan *bredr_chan;
- size_t len;
-
- mgr = amp_mgr_lookup_by_state(READ_LOC_AMP_ASSOC_FINAL);
- if (!mgr)
- return;
-
- len = sizeof(*req) + loc_assoc->len;
-
- BT_DBG("%s mgr %p assoc_len %zu", hdev->name, mgr, len);
-
- req = kzalloc(len, GFP_KERNEL);
- if (!req) {
- amp_mgr_put(mgr);
- return;
- }
-
- bredr_chan = mgr->bredr_chan;
- if (!bredr_chan)
- goto clean;
-
- req->local_id = hdev->id;
- req->remote_id = bredr_chan->remote_amp_id;
- memcpy(req->amp_assoc, loc_assoc->data, loc_assoc->len);
-
- a2mp_send(mgr, A2MP_CREATEPHYSLINK_REQ, __next_ident(mgr), len, req);
-
-clean:
- amp_mgr_put(mgr);
- kfree(req);
-}
-
-void a2mp_send_create_phy_link_rsp(struct hci_dev *hdev, u8 status)
-{
- struct amp_mgr *mgr;
- struct a2mp_physlink_rsp rsp;
- struct hci_conn *hs_hcon;
-
- mgr = amp_mgr_lookup_by_state(WRITE_REMOTE_AMP_ASSOC);
- if (!mgr)
- return;
-
- memset(&rsp, 0, sizeof(rsp));
-
- hs_hcon = hci_conn_hash_lookup_state(hdev, AMP_LINK, BT_CONNECT);
- if (!hs_hcon) {
- rsp.status = A2MP_STATUS_UNABLE_START_LINK_CREATION;
- } else {
- rsp.remote_id = hs_hcon->remote_id;
- rsp.status = A2MP_STATUS_SUCCESS;
- }
-
- BT_DBG("%s mgr %p hs_hcon %p status %u", hdev->name, mgr, hs_hcon,
- status);
-
- rsp.local_id = hdev->id;
- a2mp_send(mgr, A2MP_CREATEPHYSLINK_RSP, mgr->ident, sizeof(rsp), &rsp);
- amp_mgr_put(mgr);
-}
-
-void a2mp_discover_amp(struct l2cap_chan *chan)
-{
- struct l2cap_conn *conn = chan->conn;
- struct amp_mgr *mgr = conn->hcon->amp_mgr;
- struct a2mp_discov_req req;
-
- BT_DBG("chan %p conn %p mgr %p", chan, conn, mgr);
-
- if (!mgr) {
- mgr = amp_mgr_create(conn, true);
- if (!mgr)
- return;
- }
-
- mgr->bredr_chan = chan;
-
- memset(&req, 0, sizeof(req));
-
- req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
- req.ext_feat = 0;
- a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req);
-}