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// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
* Copyright (c) 2018-2021 The Linux Foundation. All rights reserved.
* Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include "core.h"
#include "peer.h"
#include "debug.h"
struct ath12k_peer *ath12k_peer_find(struct ath12k_base *ab, int vdev_id,
const u8 *addr)
{
struct ath12k_peer *peer;
lockdep_assert_held(&ab->base_lock);
list_for_each_entry(peer, &ab->peers, list) {
if (peer->vdev_id != vdev_id)
continue;
if (!ether_addr_equal(peer->addr, addr))
continue;
return peer;
}
return NULL;
}
static struct ath12k_peer *ath12k_peer_find_by_pdev_idx(struct ath12k_base *ab,
u8 pdev_idx, const u8 *addr)
{
struct ath12k_peer *peer;
lockdep_assert_held(&ab->base_lock);
list_for_each_entry(peer, &ab->peers, list) {
if (peer->pdev_idx != pdev_idx)
continue;
if (!ether_addr_equal(peer->addr, addr))
continue;
return peer;
}
return NULL;
}
struct ath12k_peer *ath12k_peer_find_by_addr(struct ath12k_base *ab,
const u8 *addr)
{
struct ath12k_peer *peer;
lockdep_assert_held(&ab->base_lock);
list_for_each_entry(peer, &ab->peers, list) {
if (!ether_addr_equal(peer->addr, addr))
continue;
return peer;
}
return NULL;
}
struct ath12k_peer *ath12k_peer_find_by_id(struct ath12k_base *ab,
int peer_id)
{
struct ath12k_peer *peer;
lockdep_assert_held(&ab->base_lock);
list_for_each_entry(peer, &ab->peers, list)
if (peer_id == peer->peer_id)
return peer;
return NULL;
}
bool ath12k_peer_exist_by_vdev_id(struct ath12k_base *ab, int vdev_id)
{
struct ath12k_peer *peer;
spin_lock_bh(&ab->base_lock);
list_for_each_entry(peer, &ab->peers, list) {
if (vdev_id == peer->vdev_id) {
spin_unlock_bh(&ab->base_lock);
return true;
}
}
spin_unlock_bh(&ab->base_lock);
return false;
}
struct ath12k_peer *ath12k_peer_find_by_ast(struct ath12k_base *ab,
int ast_hash)
{
struct ath12k_peer *peer;
lockdep_assert_held(&ab->base_lock);
list_for_each_entry(peer, &ab->peers, list)
if (ast_hash == peer->ast_hash)
return peer;
return NULL;
}
void ath12k_peer_unmap_event(struct ath12k_base *ab, u16 peer_id)
{
struct ath12k_peer *peer;
spin_lock_bh(&ab->base_lock);
peer = ath12k_peer_find_by_id(ab, peer_id);
if (!peer) {
ath12k_warn(ab, "peer-unmap-event: unknown peer id %d\n",
peer_id);
goto exit;
}
ath12k_dbg(ab, ATH12K_DBG_DP_HTT, "htt peer unmap vdev %d peer %pM id %d\n",
peer->vdev_id, peer->addr, peer_id);
list_del(&peer->list);
kfree(peer);
wake_up(&ab->peer_mapping_wq);
exit:
spin_unlock_bh(&ab->base_lock);
}
void ath12k_peer_map_event(struct ath12k_base *ab, u8 vdev_id, u16 peer_id,
u8 *mac_addr, u16 ast_hash, u16 hw_peer_id)
{
struct ath12k_peer *peer;
spin_lock_bh(&ab->base_lock);
peer = ath12k_peer_find(ab, vdev_id, mac_addr);
if (!peer) {
peer = kzalloc(sizeof(*peer), GFP_ATOMIC);
if (!peer)
goto exit;
peer->vdev_id = vdev_id;
peer->peer_id = peer_id;
peer->ast_hash = ast_hash;
peer->hw_peer_id = hw_peer_id;
ether_addr_copy(peer->addr, mac_addr);
list_add(&peer->list, &ab->peers);
wake_up(&ab->peer_mapping_wq);
}
ath12k_dbg(ab, ATH12K_DBG_DP_HTT, "htt peer map vdev %d peer %pM id %d\n",
vdev_id, mac_addr, peer_id);
exit:
spin_unlock_bh(&ab->base_lock);
}
static int ath12k_wait_for_peer_common(struct ath12k_base *ab, int vdev_id,
const u8 *addr, bool expect_mapped)
{
int ret;
ret = wait_event_timeout(ab->peer_mapping_wq, ({
bool mapped;
spin_lock_bh(&ab->base_lock);
mapped = !!ath12k_peer_find(ab, vdev_id, addr);
spin_unlock_bh(&ab->base_lock);
(mapped == expect_mapped ||
test_bit(ATH12K_FLAG_CRASH_FLUSH, &ab->dev_flags));
}), 3 * HZ);
if (ret <= 0)
return -ETIMEDOUT;
return 0;
}
void ath12k_peer_cleanup(struct ath12k *ar, u32 vdev_id)
{
struct ath12k_peer *peer, *tmp;
struct ath12k_base *ab = ar->ab;
lockdep_assert_held(&ar->conf_mutex);
spin_lock_bh(&ab->base_lock);
list_for_each_entry_safe(peer, tmp, &ab->peers, list) {
if (peer->vdev_id != vdev_id)
continue;
ath12k_warn(ab, "removing stale peer %pM from vdev_id %d\n",
peer->addr, vdev_id);
list_del(&peer->list);
kfree(peer);
ar->num_peers--;
}
spin_unlock_bh(&ab->base_lock);
}
static int ath12k_wait_for_peer_deleted(struct ath12k *ar, int vdev_id, const u8 *addr)
{
return ath12k_wait_for_peer_common(ar->ab, vdev_id, addr, false);
}
int ath12k_wait_for_peer_delete_done(struct ath12k *ar, u32 vdev_id,
const u8 *addr)
{
int ret;
unsigned long time_left;
ret = ath12k_wait_for_peer_deleted(ar, vdev_id, addr);
if (ret) {
ath12k_warn(ar->ab, "failed wait for peer deleted");
return ret;
}
time_left = wait_for_completion_timeout(&ar->peer_delete_done,
3 * HZ);
if (time_left == 0) {
ath12k_warn(ar->ab, "Timeout in receiving peer delete response\n");
return -ETIMEDOUT;
}
return 0;
}
int ath12k_peer_delete(struct ath12k *ar, u32 vdev_id, u8 *addr)
{
int ret;
lockdep_assert_held(&ar->conf_mutex);
reinit_completion(&ar->peer_delete_done);
ret = ath12k_wmi_send_peer_delete_cmd(ar, addr, vdev_id);
if (ret) {
ath12k_warn(ar->ab,
"failed to delete peer vdev_id %d addr %pM ret %d\n",
vdev_id, addr, ret);
return ret;
}
ret = ath12k_wait_for_peer_delete_done(ar, vdev_id, addr);
if (ret)
return ret;
ar->num_peers--;
return 0;
}
static int ath12k_wait_for_peer_created(struct ath12k *ar, int vdev_id, const u8 *addr)
{
return ath12k_wait_for_peer_common(ar->ab, vdev_id, addr, true);
}
int ath12k_peer_create(struct ath12k *ar, struct ath12k_vif *arvif,
struct ieee80211_sta *sta,
struct ath12k_wmi_peer_create_arg *arg)
{
struct ath12k_peer *peer;
int ret;
lockdep_assert_held(&ar->conf_mutex);
if (ar->num_peers > (ar->max_num_peers - 1)) {
ath12k_warn(ar->ab,
"failed to create peer due to insufficient peer entry resource in firmware\n");
return -ENOBUFS;
}
spin_lock_bh(&ar->ab->base_lock);
peer = ath12k_peer_find_by_pdev_idx(ar->ab, ar->pdev_idx, arg->peer_addr);
if (peer) {
spin_unlock_bh(&ar->ab->base_lock);
return -EINVAL;
}
spin_unlock_bh(&ar->ab->base_lock);
ret = ath12k_wmi_send_peer_create_cmd(ar, arg);
if (ret) {
ath12k_warn(ar->ab,
"failed to send peer create vdev_id %d ret %d\n",
arg->vdev_id, ret);
return ret;
}
ret = ath12k_wait_for_peer_created(ar, arg->vdev_id,
arg->peer_addr);
if (ret)
return ret;
spin_lock_bh(&ar->ab->base_lock);
peer = ath12k_peer_find(ar->ab, arg->vdev_id, arg->peer_addr);
if (!peer) {
spin_unlock_bh(&ar->ab->base_lock);
ath12k_warn(ar->ab, "failed to find peer %pM on vdev %i after creation\n",
arg->peer_addr, arg->vdev_id);
reinit_completion(&ar->peer_delete_done);
ret = ath12k_wmi_send_peer_delete_cmd(ar, arg->peer_addr,
arg->vdev_id);
if (ret) {
ath12k_warn(ar->ab, "failed to delete peer vdev_id %d addr %pM\n",
arg->vdev_id, arg->peer_addr);
return ret;
}
ret = ath12k_wait_for_peer_delete_done(ar, arg->vdev_id,
arg->peer_addr);
if (ret)
return ret;
return -ENOENT;
}
peer->pdev_idx = ar->pdev_idx;
peer->sta = sta;
if (arvif->vif->type == NL80211_IFTYPE_STATION) {
arvif->ast_hash = peer->ast_hash;
arvif->ast_idx = peer->hw_peer_id;
}
peer->sec_type = HAL_ENCRYPT_TYPE_OPEN;
peer->sec_type_grp = HAL_ENCRYPT_TYPE_OPEN;
ar->num_peers++;
spin_unlock_bh(&ar->ab->base_lock);
return 0;
}
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