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/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
/*
* Copyright (C) 2024 Intel Corporation
*/
#ifndef __iwl_agg_h__
#define __iwl_agg_h__
#include "mld.h"
#include "fw/api/rx.h"
/**
* struct iwl_mld_reorder_buffer - per ra/tid/queue reorder buffer
* @head_sn: reorder window head sequence number
* @num_stored: number of MPDUs stored in the buffer
* @queue: queue of this reorder buffer
* @valid: true if reordering is valid for this queue
*/
struct iwl_mld_reorder_buffer {
u16 head_sn;
u16 num_stored;
int queue;
bool valid;
} ____cacheline_aligned_in_smp;
/**
* struct iwl_mld_reorder_buf_entry - reorder buffer entry per-queue/per-seqno
* @frames: list of skbs stored. a list is necessary because in an A-MSDU,
* all sub-frames share the same sequence number, so they are stored
* together in the same list.
*/
struct iwl_mld_reorder_buf_entry {
struct sk_buff_head frames;
}
#ifndef __CHECKER__
/* sparse doesn't like this construct: "bad integer constant expression" */
__aligned(roundup_pow_of_two(sizeof(struct sk_buff_head)))
#endif
;
/**
* struct iwl_mld_baid_data - Block Ack session data
* @rcu_head: RCU head for freeing this data
* @sta_mask: station mask for the BAID
* @tid: tid of the session
* @baid: baid of the session
* @buf_size: the reorder buffer size as set by the last ADDBA request
* @entries_per_queue: number of buffers per queue, this actually gets
* aligned up to avoid cache line sharing between queues
* @timeout: the timeout value specified in the ADDBA request.
* @last_rx_timestamp: timestamp of the last received packet (in jiffies). This
* value is updated only when the configured @timeout has passed since
* the last update to minimize cache bouncing between RX queues.
* @session_timer: timer is set to expire after 2 * @timeout (since we want
* to minimize the cache bouncing by updating @last_rx_timestamp only once
* after @timeout has passed). If no packets are received within this
* period, it informs mac80211 to initiate delBA flow, terminating the
* BA session.
* @rcu_ptr: BA data RCU protected access
* @mld: mld pointer, needed for timer context
* @reorder_buf: reorder buffer, allocated per queue
* @entries: data
*/
struct iwl_mld_baid_data {
struct rcu_head rcu_head;
u32 sta_mask;
u8 tid;
u8 baid;
u16 buf_size;
u16 entries_per_queue;
u16 timeout;
struct timer_list session_timer;
unsigned long last_rx_timestamp;
struct iwl_mld_baid_data __rcu **rcu_ptr;
struct iwl_mld *mld;
struct iwl_mld_reorder_buffer reorder_buf[IWL_MAX_RX_HW_QUEUES];
struct iwl_mld_reorder_buf_entry entries[] ____cacheline_aligned_in_smp;
};
/**
* struct iwl_mld_delba_data - RX queue sync data for %IWL_MLD_RXQ_NOTIF_DEL_BA
*
* @baid: Block Ack id, used to identify the BA session to be removed
*/
struct iwl_mld_delba_data {
u32 baid;
} __packed;
/**
* enum iwl_mld_reorder_result - Possible return values for iwl_mld_reorder()
* indicating how the caller should handle the skb based on the result.
*
* @IWL_MLD_PASS_SKB: skb should be passed to upper layer.
* @IWL_MLD_BUFFERED_SKB: skb has been buffered, don't pass it to upper layer.
* @IWL_MLD_DROP_SKB: skb should be dropped and freed by the caller.
*/
enum iwl_mld_reorder_result {
IWL_MLD_PASS_SKB,
IWL_MLD_BUFFERED_SKB,
IWL_MLD_DROP_SKB
};
int iwl_mld_ampdu_rx_start(struct iwl_mld *mld, struct ieee80211_sta *sta,
int tid, u16 ssn, u16 buf_size, u16 timeout);
int iwl_mld_ampdu_rx_stop(struct iwl_mld *mld, struct ieee80211_sta *sta,
int tid);
enum iwl_mld_reorder_result
iwl_mld_reorder(struct iwl_mld *mld, struct napi_struct *napi,
int queue, struct ieee80211_sta *sta,
struct sk_buff *skb, struct iwl_rx_mpdu_desc *desc);
void iwl_mld_handle_frame_release_notif(struct iwl_mld *mld,
struct napi_struct *napi,
struct iwl_rx_packet *pkt, int queue);
void iwl_mld_handle_bar_frame_release_notif(struct iwl_mld *mld,
struct napi_struct *napi,
struct iwl_rx_packet *pkt,
int queue);
void iwl_mld_del_ba(struct iwl_mld *mld, int queue,
struct iwl_mld_delba_data *data);
int iwl_mld_update_sta_baids(struct iwl_mld *mld,
u32 old_sta_mask,
u32 new_sta_mask);
#endif /* __iwl_agg_h__ */
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