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