xref: /openbmc/linux/drivers/net/wireless/ath/ath11k/dp_rx.c (revision 3e8bd1ba)

// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
 * Copyright (c) 2018-2019 The Linux Foundation. All rights reserved.
 */

#include <linux/ieee80211.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <crypto/hash.h>
#include "core.h"
#include "debug.h"
#include "debugfs_htt_stats.h"
#include "debugfs_sta.h"
#include "hal_desc.h"
#include "hw.h"
#include "dp_rx.h"
#include "hal_rx.h"
#include "dp_tx.h"
#include "peer.h"

#define ATH11K_DP_RX_FRAGMENT_TIMEOUT_MS (2 * HZ)

static inline
u8 *ath11k_dp_rx_h_80211_hdr(struct ath11k_base *ab, struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_hdr_status(desc);
}

static inline
enum hal_encrypt_type ath11k_dp_rx_h_mpdu_start_enctype(struct ath11k_base *ab,
							struct hal_rx_desc *desc)
{
	if (!ab->hw_params.hw_ops->rx_desc_encrypt_valid(desc))
		return HAL_ENCRYPT_TYPE_OPEN;

	return ab->hw_params.hw_ops->rx_desc_get_encrypt_type(desc);
}

static inline u8 ath11k_dp_rx_h_msdu_start_decap_type(struct ath11k_base *ab,
						      struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_decap_type(desc);
}

static inline
bool ath11k_dp_rx_h_msdu_start_ldpc_support(struct ath11k_base *ab,
					    struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_ldpc_support(desc);
}

static inline
u8 ath11k_dp_rx_h_msdu_start_mesh_ctl_present(struct ath11k_base *ab,
					      struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_mesh_ctl(desc);
}

static inline
bool ath11k_dp_rx_h_mpdu_start_seq_ctrl_valid(struct ath11k_base *ab,
					      struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_mpdu_seq_ctl_vld(desc);
}

static inline bool ath11k_dp_rx_h_mpdu_start_fc_valid(struct ath11k_base *ab,
						      struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_mpdu_fc_valid(desc);
}

static inline bool ath11k_dp_rx_h_mpdu_start_more_frags(struct ath11k_base *ab,
							struct sk_buff *skb)
{
	struct ieee80211_hdr *hdr;

	hdr = (struct ieee80211_hdr *)(skb->data + ab->hw_params.hal_desc_sz);
	return ieee80211_has_morefrags(hdr->frame_control);
}

static inline u16 ath11k_dp_rx_h_mpdu_start_frag_no(struct ath11k_base *ab,
						    struct sk_buff *skb)
{
	struct ieee80211_hdr *hdr;

	hdr = (struct ieee80211_hdr *)(skb->data + ab->hw_params.hal_desc_sz);
	return le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
}

static inline u16 ath11k_dp_rx_h_mpdu_start_seq_no(struct ath11k_base *ab,
						   struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_mpdu_start_seq_no(desc);
}

static inline void *ath11k_dp_rx_get_attention(struct ath11k_base *ab,
					       struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_attention(desc);
}

static inline bool ath11k_dp_rx_h_attn_msdu_done(struct rx_attention *attn)
{
	return !!FIELD_GET(RX_ATTENTION_INFO2_MSDU_DONE,
			   __le32_to_cpu(attn->info2));
}

static inline bool ath11k_dp_rx_h_attn_l4_cksum_fail(struct rx_attention *attn)
{
	return !!FIELD_GET(RX_ATTENTION_INFO1_TCP_UDP_CKSUM_FAIL,
			   __le32_to_cpu(attn->info1));
}

static inline bool ath11k_dp_rx_h_attn_ip_cksum_fail(struct rx_attention *attn)
{
	return !!FIELD_GET(RX_ATTENTION_INFO1_IP_CKSUM_FAIL,
			   __le32_to_cpu(attn->info1));
}

static inline bool ath11k_dp_rx_h_attn_is_decrypted(struct rx_attention *attn)
{
	return (FIELD_GET(RX_ATTENTION_INFO2_DCRYPT_STATUS_CODE,
			  __le32_to_cpu(attn->info2)) ==
		RX_DESC_DECRYPT_STATUS_CODE_OK);
}

static u32 ath11k_dp_rx_h_attn_mpdu_err(struct rx_attention *attn)
{
	u32 info = __le32_to_cpu(attn->info1);
	u32 errmap = 0;

	if (info & RX_ATTENTION_INFO1_FCS_ERR)
		errmap |= DP_RX_MPDU_ERR_FCS;

	if (info & RX_ATTENTION_INFO1_DECRYPT_ERR)
		errmap |= DP_RX_MPDU_ERR_DECRYPT;

	if (info & RX_ATTENTION_INFO1_TKIP_MIC_ERR)
		errmap |= DP_RX_MPDU_ERR_TKIP_MIC;

	if (info & RX_ATTENTION_INFO1_A_MSDU_ERROR)
		errmap |= DP_RX_MPDU_ERR_AMSDU_ERR;

	if (info & RX_ATTENTION_INFO1_OVERFLOW_ERR)
		errmap |= DP_RX_MPDU_ERR_OVERFLOW;

	if (info & RX_ATTENTION_INFO1_MSDU_LEN_ERR)
		errmap |= DP_RX_MPDU_ERR_MSDU_LEN;

	if (info & RX_ATTENTION_INFO1_MPDU_LEN_ERR)
		errmap |= DP_RX_MPDU_ERR_MPDU_LEN;

	return errmap;
}

static bool ath11k_dp_rx_h_attn_msdu_len_err(struct ath11k_base *ab,
					     struct hal_rx_desc *desc)
{
	struct rx_attention *rx_attention;
	u32 errmap;

	rx_attention = ath11k_dp_rx_get_attention(ab, desc);
	errmap = ath11k_dp_rx_h_attn_mpdu_err(rx_attention);

	return errmap & DP_RX_MPDU_ERR_MSDU_LEN;
}

static inline u16 ath11k_dp_rx_h_msdu_start_msdu_len(struct ath11k_base *ab,
						     struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_msdu_len(desc);
}

static inline u8 ath11k_dp_rx_h_msdu_start_sgi(struct ath11k_base *ab,
					       struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_msdu_sgi(desc);
}

static inline u8 ath11k_dp_rx_h_msdu_start_rate_mcs(struct ath11k_base *ab,
						    struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_msdu_rate_mcs(desc);
}

static inline u8 ath11k_dp_rx_h_msdu_start_rx_bw(struct ath11k_base *ab,
						 struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_msdu_rx_bw(desc);
}

static inline u32 ath11k_dp_rx_h_msdu_start_freq(struct ath11k_base *ab,
						 struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_msdu_freq(desc);
}

static inline u8 ath11k_dp_rx_h_msdu_start_pkt_type(struct ath11k_base *ab,
						    struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_msdu_pkt_type(desc);
}

static inline u8 ath11k_dp_rx_h_msdu_start_nss(struct ath11k_base *ab,
					       struct hal_rx_desc *desc)
{
	return hweight8(ab->hw_params.hw_ops->rx_desc_get_msdu_nss(desc));
}

static inline u8 ath11k_dp_rx_h_mpdu_start_tid(struct ath11k_base *ab,
					       struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_mpdu_tid(desc);
}

static inline u16 ath11k_dp_rx_h_mpdu_start_peer_id(struct ath11k_base *ab,
						    struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_mpdu_peer_id(desc);
}

static inline u8 ath11k_dp_rx_h_msdu_end_l3pad(struct ath11k_base *ab,
					       struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_l3_pad_bytes(desc);
}

static inline bool ath11k_dp_rx_h_msdu_end_first_msdu(struct ath11k_base *ab,
						      struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_first_msdu(desc);
}

static bool ath11k_dp_rx_h_msdu_end_last_msdu(struct ath11k_base *ab,
					      struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_last_msdu(desc);
}

static void ath11k_dp_rx_desc_end_tlv_copy(struct ath11k_base *ab,
					   struct hal_rx_desc *fdesc,
					   struct hal_rx_desc *ldesc)
{
	ab->hw_params.hw_ops->rx_desc_copy_attn_end_tlv(fdesc, ldesc);
}

static inline u32 ath11k_dp_rxdesc_get_mpdulen_err(struct rx_attention *attn)
{
	return FIELD_GET(RX_ATTENTION_INFO1_MPDU_LEN_ERR,
			 __le32_to_cpu(attn->info1));
}

static inline u8 *ath11k_dp_rxdesc_get_80211hdr(struct ath11k_base *ab,
						struct hal_rx_desc *rx_desc)
{
	u8 *rx_pkt_hdr;

	rx_pkt_hdr = ab->hw_params.hw_ops->rx_desc_get_msdu_payload(rx_desc);

	return rx_pkt_hdr;
}

static inline bool ath11k_dp_rxdesc_mpdu_valid(struct ath11k_base *ab,
					       struct hal_rx_desc *rx_desc)
{
	u32 tlv_tag;

	tlv_tag = ab->hw_params.hw_ops->rx_desc_get_mpdu_start_tag(rx_desc);

	return tlv_tag == HAL_RX_MPDU_START;
}

static inline u32 ath11k_dp_rxdesc_get_ppduid(struct ath11k_base *ab,
					      struct hal_rx_desc *rx_desc)
{
	return ab->hw_params.hw_ops->rx_desc_get_mpdu_ppdu_id(rx_desc);
}

static inline void ath11k_dp_rxdesc_set_msdu_len(struct ath11k_base *ab,
						 struct hal_rx_desc *desc,
						 u16 len)
{
	ab->hw_params.hw_ops->rx_desc_set_msdu_len(desc, len);
}

static bool ath11k_dp_rx_h_attn_is_mcbc(struct ath11k_base *ab,
					struct hal_rx_desc *desc)
{
	struct rx_attention *attn = ath11k_dp_rx_get_attention(ab, desc);

	return ath11k_dp_rx_h_msdu_end_first_msdu(ab, desc) &&
		(!!FIELD_GET(RX_ATTENTION_INFO1_MCAST_BCAST,
		 __le32_to_cpu(attn->info1)));
}

static bool ath11k_dp_rxdesc_mac_addr2_valid(struct ath11k_base *ab,
					     struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_mac_addr2_valid(desc);
}

static u8 *ath11k_dp_rxdesc_mpdu_start_addr2(struct ath11k_base *ab,
					     struct hal_rx_desc *desc)
{
	return ab->hw_params.hw_ops->rx_desc_mpdu_start_addr2(desc);
}

static void ath11k_dp_service_mon_ring(struct timer_list *t)
{
	struct ath11k_base *ab = from_timer(ab, t, mon_reap_timer);
	int i;

	for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++)
		ath11k_dp_rx_process_mon_rings(ab, i, NULL, DP_MON_SERVICE_BUDGET);

	mod_timer(&ab->mon_reap_timer, jiffies +
		  msecs_to_jiffies(ATH11K_MON_TIMER_INTERVAL));
}

static int ath11k_dp_purge_mon_ring(struct ath11k_base *ab)
{
	int i, reaped = 0;
	unsigned long timeout = jiffies + msecs_to_jiffies(DP_MON_PURGE_TIMEOUT_MS);

	do {
		for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++)
			reaped += ath11k_dp_rx_process_mon_rings(ab, i,
								 NULL,
								 DP_MON_SERVICE_BUDGET);

		/* nothing more to reap */
		if (reaped < DP_MON_SERVICE_BUDGET)
			return 0;

	} while (time_before(jiffies, timeout));

	ath11k_warn(ab, "dp mon ring purge timeout");

	return -ETIMEDOUT;
}

/* Returns number of Rx buffers replenished */
int ath11k_dp_rxbufs_replenish(struct ath11k_base *ab, int mac_id,
			       struct dp_rxdma_ring *rx_ring,
			       int req_entries,
			       enum hal_rx_buf_return_buf_manager mgr)
{
	struct hal_srng *srng;
	u32 *desc;
	struct sk_buff *skb;
	int num_free;
	int num_remain;
	int buf_id;
	u32 cookie;
	dma_addr_t paddr;

	req_entries = min(req_entries, rx_ring->bufs_max);

	srng = &ab->hal.srng_list[rx_ring->refill_buf_ring.ring_id];

	spin_lock_bh(&srng->lock);

	ath11k_hal_srng_access_begin(ab, srng);

	num_free = ath11k_hal_srng_src_num_free(ab, srng, true);
	if (!req_entries && (num_free > (rx_ring->bufs_max * 3) / 4))
		req_entries = num_free;

	req_entries = min(num_free, req_entries);
	num_remain = req_entries;

	while (num_remain > 0) {
		skb = dev_alloc_skb(DP_RX_BUFFER_SIZE +
				    DP_RX_BUFFER_ALIGN_SIZE);
		if (!skb)
			break;

		if (!IS_ALIGNED((unsigned long)skb->data,
				DP_RX_BUFFER_ALIGN_SIZE)) {
			skb_pull(skb,
				 PTR_ALIGN(skb->data, DP_RX_BUFFER_ALIGN_SIZE) -
				 skb->data);
		}

		paddr = dma_map_single(ab->dev, skb->data,
				       skb->len + skb_tailroom(skb),
				       DMA_FROM_DEVICE);
		if (dma_mapping_error(ab->dev, paddr))
			goto fail_free_skb;

		spin_lock_bh(&rx_ring->idr_lock);
		buf_id = idr_alloc(&rx_ring->bufs_idr, skb, 1,
				   (rx_ring->bufs_max * 3) + 1, GFP_ATOMIC);
		spin_unlock_bh(&rx_ring->idr_lock);
		if (buf_id <= 0)
			goto fail_dma_unmap;

		desc = ath11k_hal_srng_src_get_next_entry(ab, srng);
		if (!desc)
			goto fail_idr_remove;

		ATH11K_SKB_RXCB(skb)->paddr = paddr;

		cookie = FIELD_PREP(DP_RXDMA_BUF_COOKIE_PDEV_ID, mac_id) |
			 FIELD_PREP(DP_RXDMA_BUF_COOKIE_BUF_ID, buf_id);

		num_remain--;

		ath11k_hal_rx_buf_addr_info_set(desc, paddr, cookie, mgr);
	}

	ath11k_hal_srng_access_end(ab, srng);

	spin_unlock_bh(&srng->lock);

	return req_entries - num_remain;

fail_idr_remove:
	spin_lock_bh(&rx_ring->idr_lock);
	idr_remove(&rx_ring->bufs_idr, buf_id);
	spin_unlock_bh(&rx_ring->idr_lock);
fail_dma_unmap:
	dma_unmap_single(ab->dev, paddr, skb->len + skb_tailroom(skb),
			 DMA_FROM_DEVICE);
fail_free_skb:
	dev_kfree_skb_any(skb);

	ath11k_hal_srng_access_end(ab, srng);

	spin_unlock_bh(&srng->lock);

	return req_entries - num_remain;
}

static int ath11k_dp_rxdma_buf_ring_free(struct ath11k *ar,
					 struct dp_rxdma_ring *rx_ring)
{
	struct sk_buff *skb;
	int buf_id;

	spin_lock_bh(&rx_ring->idr_lock);
	idr_for_each_entry(&rx_ring->bufs_idr, skb, buf_id) {
		idr_remove(&rx_ring->bufs_idr, buf_id);
		/* TODO: Understand where internal driver does this dma_unmap
		 * of rxdma_buffer.
		 */
		dma_unmap_single(ar->ab->dev, ATH11K_SKB_RXCB(skb)->paddr,
				 skb->len + skb_tailroom(skb), DMA_FROM_DEVICE);
		dev_kfree_skb_any(skb);
	}

	idr_destroy(&rx_ring->bufs_idr);
	spin_unlock_bh(&rx_ring->idr_lock);

	return 0;
}

static int ath11k_dp_rxdma_pdev_buf_free(struct ath11k *ar)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_base *ab = ar->ab;
	struct dp_rxdma_ring *rx_ring = &dp->rx_refill_buf_ring;
	int i;

	ath11k_dp_rxdma_buf_ring_free(ar, rx_ring);

	rx_ring = &dp->rxdma_mon_buf_ring;
	ath11k_dp_rxdma_buf_ring_free(ar, rx_ring);

	for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
		rx_ring = &dp->rx_mon_status_refill_ring[i];
		ath11k_dp_rxdma_buf_ring_free(ar, rx_ring);
	}

	return 0;
}

static int ath11k_dp_rxdma_ring_buf_setup(struct ath11k *ar,
					  struct dp_rxdma_ring *rx_ring,
					  u32 ringtype)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	int num_entries;

	num_entries = rx_ring->refill_buf_ring.size /
		ath11k_hal_srng_get_entrysize(ar->ab, ringtype);

	rx_ring->bufs_max = num_entries;
	ath11k_dp_rxbufs_replenish(ar->ab, dp->mac_id, rx_ring, num_entries,
				   ar->ab->hw_params.hal_params->rx_buf_rbm);
	return 0;
}

static int ath11k_dp_rxdma_pdev_buf_setup(struct ath11k *ar)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_base *ab = ar->ab;
	struct dp_rxdma_ring *rx_ring = &dp->rx_refill_buf_ring;
	int i;

	ath11k_dp_rxdma_ring_buf_setup(ar, rx_ring, HAL_RXDMA_BUF);

	if (ar->ab->hw_params.rxdma1_enable) {
		rx_ring = &dp->rxdma_mon_buf_ring;
		ath11k_dp_rxdma_ring_buf_setup(ar, rx_ring, HAL_RXDMA_MONITOR_BUF);
	}

	for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
		rx_ring = &dp->rx_mon_status_refill_ring[i];
		ath11k_dp_rxdma_ring_buf_setup(ar, rx_ring, HAL_RXDMA_MONITOR_STATUS);
	}

	return 0;
}

static void ath11k_dp_rx_pdev_srng_free(struct ath11k *ar)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_base *ab = ar->ab;
	int i;

	ath11k_dp_srng_cleanup(ab, &dp->rx_refill_buf_ring.refill_buf_ring);

	for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
		if (ab->hw_params.rx_mac_buf_ring)
			ath11k_dp_srng_cleanup(ab, &dp->rx_mac_buf_ring[i]);

		ath11k_dp_srng_cleanup(ab, &dp->rxdma_err_dst_ring[i]);
		ath11k_dp_srng_cleanup(ab,
				       &dp->rx_mon_status_refill_ring[i].refill_buf_ring);
	}

	ath11k_dp_srng_cleanup(ab, &dp->rxdma_mon_buf_ring.refill_buf_ring);
}

void ath11k_dp_pdev_reo_cleanup(struct ath11k_base *ab)
{
	struct ath11k_dp *dp = &ab->dp;
	int i;

	for (i = 0; i < DP_REO_DST_RING_MAX; i++)
		ath11k_dp_srng_cleanup(ab, &dp->reo_dst_ring[i]);
}

int ath11k_dp_pdev_reo_setup(struct ath11k_base *ab)
{
	struct ath11k_dp *dp = &ab->dp;
	int ret;
	int i;

	for (i = 0; i < DP_REO_DST_RING_MAX; i++) {
		ret = ath11k_dp_srng_setup(ab, &dp->reo_dst_ring[i],
					   HAL_REO_DST, i, 0,
					   DP_REO_DST_RING_SIZE);
		if (ret) {
			ath11k_warn(ab, "failed to setup reo_dst_ring\n");
			goto err_reo_cleanup;
		}
	}

	return 0;

err_reo_cleanup:
	ath11k_dp_pdev_reo_cleanup(ab);

	return ret;
}

static int ath11k_dp_rx_pdev_srng_alloc(struct ath11k *ar)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_base *ab = ar->ab;
	struct dp_srng *srng = NULL;
	int i;
	int ret;

	ret = ath11k_dp_srng_setup(ar->ab,
				   &dp->rx_refill_buf_ring.refill_buf_ring,
				   HAL_RXDMA_BUF, 0,
				   dp->mac_id, DP_RXDMA_BUF_RING_SIZE);
	if (ret) {
		ath11k_warn(ar->ab, "failed to setup rx_refill_buf_ring\n");
		return ret;
	}

	if (ar->ab->hw_params.rx_mac_buf_ring) {
		for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
			ret = ath11k_dp_srng_setup(ar->ab,
						   &dp->rx_mac_buf_ring[i],
						   HAL_RXDMA_BUF, 1,
						   dp->mac_id + i, 1024);
			if (ret) {
				ath11k_warn(ar->ab, "failed to setup rx_mac_buf_ring %d\n",
					    i);
				return ret;
			}
		}
	}

	for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
		ret = ath11k_dp_srng_setup(ar->ab, &dp->rxdma_err_dst_ring[i],
					   HAL_RXDMA_DST, 0, dp->mac_id + i,
					   DP_RXDMA_ERR_DST_RING_SIZE);
		if (ret) {
			ath11k_warn(ar->ab, "failed to setup rxdma_err_dst_ring %d\n", i);
			return ret;
		}
	}

	for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
		srng = &dp->rx_mon_status_refill_ring[i].refill_buf_ring;
		ret = ath11k_dp_srng_setup(ar->ab,
					   srng,
					   HAL_RXDMA_MONITOR_STATUS, 0, dp->mac_id + i,
					   DP_RXDMA_MON_STATUS_RING_SIZE);
		if (ret) {
			ath11k_warn(ar->ab,
				    "failed to setup rx_mon_status_refill_ring %d\n", i);
			return ret;
		}
	}

	/* if rxdma1_enable is false, then it doesn't need
	 * to setup rxdam_mon_buf_ring, rxdma_mon_dst_ring
	 * and rxdma_mon_desc_ring.
	 * init reap timer for QCA6390.
	 */
	if (!ar->ab->hw_params.rxdma1_enable) {
		//init mon status buffer reap timer
		timer_setup(&ar->ab->mon_reap_timer,
			    ath11k_dp_service_mon_ring, 0);
		return 0;
	}

	ret = ath11k_dp_srng_setup(ar->ab,
				   &dp->rxdma_mon_buf_ring.refill_buf_ring,
				   HAL_RXDMA_MONITOR_BUF, 0, dp->mac_id,
				   DP_RXDMA_MONITOR_BUF_RING_SIZE);
	if (ret) {
		ath11k_warn(ar->ab,
			    "failed to setup HAL_RXDMA_MONITOR_BUF\n");
		return ret;
	}

	ret = ath11k_dp_srng_setup(ar->ab, &dp->rxdma_mon_dst_ring,
				   HAL_RXDMA_MONITOR_DST, 0, dp->mac_id,
				   DP_RXDMA_MONITOR_DST_RING_SIZE);
	if (ret) {
		ath11k_warn(ar->ab,
			    "failed to setup HAL_RXDMA_MONITOR_DST\n");
		return ret;
	}

	ret = ath11k_dp_srng_setup(ar->ab, &dp->rxdma_mon_desc_ring,
				   HAL_RXDMA_MONITOR_DESC, 0, dp->mac_id,
				   DP_RXDMA_MONITOR_DESC_RING_SIZE);
	if (ret) {
		ath11k_warn(ar->ab,
			    "failed to setup HAL_RXDMA_MONITOR_DESC\n");
		return ret;
	}

	return 0;
}

void ath11k_dp_reo_cmd_list_cleanup(struct ath11k_base *ab)
{
	struct ath11k_dp *dp = &ab->dp;
	struct dp_reo_cmd *cmd, *tmp;
	struct dp_reo_cache_flush_elem *cmd_cache, *tmp_cache;
	struct dp_rx_tid *rx_tid;

	spin_lock_bh(&dp->reo_cmd_lock);
	list_for_each_entry_safe(cmd, tmp, &dp->reo_cmd_list, list) {
		list_del(&cmd->list);
		rx_tid = &cmd->data;
		if (rx_tid->vaddr) {
			dma_unmap_single(ab->dev, rx_tid->paddr,
					 rx_tid->size, DMA_BIDIRECTIONAL);
			kfree(rx_tid->vaddr);
			rx_tid->vaddr = NULL;
		}
		kfree(cmd);
	}

	list_for_each_entry_safe(cmd_cache, tmp_cache,
				 &dp->reo_cmd_cache_flush_list, list) {
		list_del(&cmd_cache->list);
		dp->reo_cmd_cache_flush_count--;
		rx_tid = &cmd_cache->data;
		if (rx_tid->vaddr) {
			dma_unmap_single(ab->dev, rx_tid->paddr,
					 rx_tid->size, DMA_BIDIRECTIONAL);
			kfree(rx_tid->vaddr);
			rx_tid->vaddr = NULL;
		}
		kfree(cmd_cache);
	}
	spin_unlock_bh(&dp->reo_cmd_lock);
}

static void ath11k_dp_reo_cmd_free(struct ath11k_dp *dp, void *ctx,
				   enum hal_reo_cmd_status status)
{
	struct dp_rx_tid *rx_tid = ctx;

	if (status != HAL_REO_CMD_SUCCESS)
		ath11k_warn(dp->ab, "failed to flush rx tid hw desc, tid %d status %d\n",
			    rx_tid->tid, status);
	if (rx_tid->vaddr) {
		dma_unmap_single(dp->ab->dev, rx_tid->paddr, rx_tid->size,
				 DMA_BIDIRECTIONAL);
		kfree(rx_tid->vaddr);
		rx_tid->vaddr = NULL;
	}
}

static void ath11k_dp_reo_cache_flush(struct ath11k_base *ab,
				      struct dp_rx_tid *rx_tid)
{
	struct ath11k_hal_reo_cmd cmd = {0};
	unsigned long tot_desc_sz, desc_sz;
	int ret;

	tot_desc_sz = rx_tid->size;
	desc_sz = ath11k_hal_reo_qdesc_size(0, HAL_DESC_REO_NON_QOS_TID);

	while (tot_desc_sz > desc_sz) {
		tot_desc_sz -= desc_sz;
		cmd.addr_lo = lower_32_bits(rx_tid->paddr + tot_desc_sz);
		cmd.addr_hi = upper_32_bits(rx_tid->paddr);
		ret = ath11k_dp_tx_send_reo_cmd(ab, rx_tid,
						HAL_REO_CMD_FLUSH_CACHE, &cmd,
						NULL);
		if (ret)
			ath11k_warn(ab,
				    "failed to send HAL_REO_CMD_FLUSH_CACHE, tid %d (%d)\n",
				    rx_tid->tid, ret);
	}

	memset(&cmd, 0, sizeof(cmd));
	cmd.addr_lo = lower_32_bits(rx_tid->paddr);
	cmd.addr_hi = upper_32_bits(rx_tid->paddr);
	cmd.flag |= HAL_REO_CMD_FLG_NEED_STATUS;
	ret = ath11k_dp_tx_send_reo_cmd(ab, rx_tid,
					HAL_REO_CMD_FLUSH_CACHE,
					&cmd, ath11k_dp_reo_cmd_free);
	if (ret) {
		ath11k_err(ab, "failed to send HAL_REO_CMD_FLUSH_CACHE cmd, tid %d (%d)\n",
			   rx_tid->tid, ret);
		dma_unmap_single(ab->dev, rx_tid->paddr, rx_tid->size,
				 DMA_BIDIRECTIONAL);
		kfree(rx_tid->vaddr);
		rx_tid->vaddr = NULL;
	}
}

static void ath11k_dp_rx_tid_del_func(struct ath11k_dp *dp, void *ctx,
				      enum hal_reo_cmd_status status)
{
	struct ath11k_base *ab = dp->ab;
	struct dp_rx_tid *rx_tid = ctx;
	struct dp_reo_cache_flush_elem *elem, *tmp;

	if (status == HAL_REO_CMD_DRAIN) {
		goto free_desc;
	} else if (status != HAL_REO_CMD_SUCCESS) {
		/* Shouldn't happen! Cleanup in case of other failure? */
		ath11k_warn(ab, "failed to delete rx tid %d hw descriptor %d\n",
			    rx_tid->tid, status);
		return;
	}

	elem = kzalloc(sizeof(*elem), GFP_ATOMIC);
	if (!elem)
		goto free_desc;

	elem->ts = jiffies;
	memcpy(&elem->data, rx_tid, sizeof(*rx_tid));

	spin_lock_bh(&dp->reo_cmd_lock);
	list_add_tail(&elem->list, &dp->reo_cmd_cache_flush_list);
	dp->reo_cmd_cache_flush_count++;

	/* Flush and invalidate aged REO desc from HW cache */
	list_for_each_entry_safe(elem, tmp, &dp->reo_cmd_cache_flush_list,
				 list) {
		if (dp->reo_cmd_cache_flush_count > DP_REO_DESC_FREE_THRESHOLD ||
		    time_after(jiffies, elem->ts +
			       msecs_to_jiffies(DP_REO_DESC_FREE_TIMEOUT_MS))) {
			list_del(&elem->list);
			dp->reo_cmd_cache_flush_count--;
			spin_unlock_bh(&dp->reo_cmd_lock);

			ath11k_dp_reo_cache_flush(ab, &elem->data);
			kfree(elem);
			spin_lock_bh(&dp->reo_cmd_lock);
		}
	}
	spin_unlock_bh(&dp->reo_cmd_lock);

	return;
free_desc:
	dma_unmap_single(ab->dev, rx_tid->paddr, rx_tid->size,
			 DMA_BIDIRECTIONAL);
	kfree(rx_tid->vaddr);
	rx_tid->vaddr = NULL;
}

void ath11k_peer_rx_tid_delete(struct ath11k *ar,
			       struct ath11k_peer *peer, u8 tid)
{
	struct ath11k_hal_reo_cmd cmd = {0};
	struct dp_rx_tid *rx_tid = &peer->rx_tid[tid];
	int ret;

	if (!rx_tid->active)
		return;

	rx_tid->active = false;

	cmd.flag = HAL_REO_CMD_FLG_NEED_STATUS;
	cmd.addr_lo = lower_32_bits(rx_tid->paddr);
	cmd.addr_hi = upper_32_bits(rx_tid->paddr);
	cmd.upd0 |= HAL_REO_CMD_UPD0_VLD;
	ret = ath11k_dp_tx_send_reo_cmd(ar->ab, rx_tid,
					HAL_REO_CMD_UPDATE_RX_QUEUE, &cmd,
					ath11k_dp_rx_tid_del_func);
	if (ret) {
		if (ret != -ESHUTDOWN)
			ath11k_err(ar->ab, "failed to send HAL_REO_CMD_UPDATE_RX_QUEUE cmd, tid %d (%d)\n",
				   tid, ret);
		dma_unmap_single(ar->ab->dev, rx_tid->paddr, rx_tid->size,
				 DMA_BIDIRECTIONAL);
		kfree(rx_tid->vaddr);
		rx_tid->vaddr = NULL;
	}

	rx_tid->paddr = 0;
	rx_tid->size = 0;
}

static int ath11k_dp_rx_link_desc_return(struct ath11k_base *ab,
					 u32 *link_desc,
					 enum hal_wbm_rel_bm_act action)
{
	struct ath11k_dp *dp = &ab->dp;
	struct hal_srng *srng;
	u32 *desc;
	int ret = 0;

	srng = &ab->hal.srng_list[dp->wbm_desc_rel_ring.ring_id];

	spin_lock_bh(&srng->lock);

	ath11k_hal_srng_access_begin(ab, srng);

	desc = ath11k_hal_srng_src_get_next_entry(ab, srng);
	if (!desc) {
		ret = -ENOBUFS;
		goto exit;
	}

	ath11k_hal_rx_msdu_link_desc_set(ab, (void *)desc, (void *)link_desc,
					 action);

exit:
	ath11k_hal_srng_access_end(ab, srng);

	spin_unlock_bh(&srng->lock);

	return ret;
}

static void ath11k_dp_rx_frags_cleanup(struct dp_rx_tid *rx_tid, bool rel_link_desc)
{
	struct ath11k_base *ab = rx_tid->ab;

	lockdep_assert_held(&ab->base_lock);

	if (rx_tid->dst_ring_desc) {
		if (rel_link_desc)
			ath11k_dp_rx_link_desc_return(ab, (u32 *)rx_tid->dst_ring_desc,
						      HAL_WBM_REL_BM_ACT_PUT_IN_IDLE);
		kfree(rx_tid->dst_ring_desc);
		rx_tid->dst_ring_desc = NULL;
	}

	rx_tid->cur_sn = 0;
	rx_tid->last_frag_no = 0;
	rx_tid->rx_frag_bitmap = 0;
	__skb_queue_purge(&rx_tid->rx_frags);
}

void ath11k_peer_frags_flush(struct ath11k *ar, struct ath11k_peer *peer)
{
	struct dp_rx_tid *rx_tid;
	int i;

	lockdep_assert_held(&ar->ab->base_lock);

	for (i = 0; i <= IEEE80211_NUM_TIDS; i++) {
		rx_tid = &peer->rx_tid[i];

		spin_unlock_bh(&ar->ab->base_lock);
		del_timer_sync(&rx_tid->frag_timer);
		spin_lock_bh(&ar->ab->base_lock);

		ath11k_dp_rx_frags_cleanup(rx_tid, true);
	}
}

void ath11k_peer_rx_tid_cleanup(struct ath11k *ar, struct ath11k_peer *peer)
{
	struct dp_rx_tid *rx_tid;
	int i;

	lockdep_assert_held(&ar->ab->base_lock);

	for (i = 0; i <= IEEE80211_NUM_TIDS; i++) {
		rx_tid = &peer->rx_tid[i];

		ath11k_peer_rx_tid_delete(ar, peer, i);
		ath11k_dp_rx_frags_cleanup(rx_tid, true);

		spin_unlock_bh(&ar->ab->base_lock);
		del_timer_sync(&rx_tid->frag_timer);
		spin_lock_bh(&ar->ab->base_lock);
	}
}

static int ath11k_peer_rx_tid_reo_update(struct ath11k *ar,
					 struct ath11k_peer *peer,
					 struct dp_rx_tid *rx_tid,
					 u32 ba_win_sz, u16 ssn,
					 bool update_ssn)
{
	struct ath11k_hal_reo_cmd cmd = {0};
	int ret;

	cmd.addr_lo = lower_32_bits(rx_tid->paddr);
	cmd.addr_hi = upper_32_bits(rx_tid->paddr);
	cmd.flag = HAL_REO_CMD_FLG_NEED_STATUS;
	cmd.upd0 = HAL_REO_CMD_UPD0_BA_WINDOW_SIZE;
	cmd.ba_window_size = ba_win_sz;

	if (update_ssn) {
		cmd.upd0 |= HAL_REO_CMD_UPD0_SSN;
		cmd.upd2 = FIELD_PREP(HAL_REO_CMD_UPD2_SSN, ssn);
	}

	ret = ath11k_dp_tx_send_reo_cmd(ar->ab, rx_tid,
					HAL_REO_CMD_UPDATE_RX_QUEUE, &cmd,
					NULL);
	if (ret) {
		ath11k_warn(ar->ab, "failed to update rx tid queue, tid %d (%d)\n",
			    rx_tid->tid, ret);
		return ret;
	}

	rx_tid->ba_win_sz = ba_win_sz;

	return 0;
}

static void ath11k_dp_rx_tid_mem_free(struct ath11k_base *ab,
				      const u8 *peer_mac, int vdev_id, u8 tid)
{
	struct ath11k_peer *peer;
	struct dp_rx_tid *rx_tid;

	spin_lock_bh(&ab->base_lock);

	peer = ath11k_peer_find(ab, vdev_id, peer_mac);
	if (!peer) {
		ath11k_warn(ab, "failed to find the peer to free up rx tid mem\n");
		goto unlock_exit;
	}

	rx_tid = &peer->rx_tid[tid];
	if (!rx_tid->active)
		goto unlock_exit;

	dma_unmap_single(ab->dev, rx_tid->paddr, rx_tid->size,
			 DMA_BIDIRECTIONAL);
	kfree(rx_tid->vaddr);
	rx_tid->vaddr = NULL;

	rx_tid->active = false;

unlock_exit:
	spin_unlock_bh(&ab->base_lock);
}

int ath11k_peer_rx_tid_setup(struct ath11k *ar, const u8 *peer_mac, int vdev_id,
			     u8 tid, u32 ba_win_sz, u16 ssn,
			     enum hal_pn_type pn_type)
{
	struct ath11k_base *ab = ar->ab;
	struct ath11k_peer *peer;
	struct dp_rx_tid *rx_tid;
	u32 hw_desc_sz;
	u32 *addr_aligned;
	void *vaddr;
	dma_addr_t paddr;
	int ret;

	spin_lock_bh(&ab->base_lock);

	peer = ath11k_peer_find(ab, vdev_id, peer_mac);
	if (!peer) {
		ath11k_warn(ab, "failed to find the peer %pM to set up rx tid\n",
			    peer_mac);
		spin_unlock_bh(&ab->base_lock);
		return -ENOENT;
	}

	rx_tid = &peer->rx_tid[tid];
	/* Update the tid queue if it is already setup */
	if (rx_tid->active) {
		paddr = rx_tid->paddr;
		ret = ath11k_peer_rx_tid_reo_update(ar, peer, rx_tid,
						    ba_win_sz, ssn, true);
		spin_unlock_bh(&ab->base_lock);
		if (ret) {
			ath11k_warn(ab, "failed to update reo for peer %pM rx tid %d\n: %d",
				    peer_mac, tid, ret);
			return ret;
		}

		ret = ath11k_wmi_peer_rx_reorder_queue_setup(ar, vdev_id,
							     peer_mac, paddr,
							     tid, 1, ba_win_sz);
		if (ret)
			ath11k_warn(ab, "failed to send wmi rx reorder queue for peer %pM tid %d: %d\n",
				    peer_mac, tid, ret);
		return ret;
	}

	rx_tid->tid = tid;

	rx_tid->ba_win_sz = ba_win_sz;

	/* TODO: Optimize the memory allocation for qos tid based on
	 * the actual BA window size in REO tid update path.
	 */
	if (tid == HAL_DESC_REO_NON_QOS_TID)
		hw_desc_sz = ath11k_hal_reo_qdesc_size(ba_win_sz, tid);
	else
		hw_desc_sz = ath11k_hal_reo_qdesc_size(DP_BA_WIN_SZ_MAX, tid);

	vaddr = kzalloc(hw_desc_sz + HAL_LINK_DESC_ALIGN - 1, GFP_ATOMIC);
	if (!vaddr) {
		spin_unlock_bh(&ab->base_lock);
		return -ENOMEM;
	}

	addr_aligned = PTR_ALIGN(vaddr, HAL_LINK_DESC_ALIGN);

	ath11k_hal_reo_qdesc_setup(addr_aligned, tid, ba_win_sz,
				   ssn, pn_type);

	paddr = dma_map_single(ab->dev, addr_aligned, hw_desc_sz,
			       DMA_BIDIRECTIONAL);

	ret = dma_mapping_error(ab->dev, paddr);
	if (ret) {
		spin_unlock_bh(&ab->base_lock);
		ath11k_warn(ab, "failed to setup dma map for peer %pM rx tid %d: %d\n",
			    peer_mac, tid, ret);
		goto err_mem_free;
	}

	rx_tid->vaddr = vaddr;
	rx_tid->paddr = paddr;
	rx_tid->size = hw_desc_sz;
	rx_tid->active = true;

	spin_unlock_bh(&ab->base_lock);

	ret = ath11k_wmi_peer_rx_reorder_queue_setup(ar, vdev_id, peer_mac,
						     paddr, tid, 1, ba_win_sz);
	if (ret) {
		ath11k_warn(ar->ab, "failed to setup rx reorder queue for peer %pM tid %d: %d\n",
			    peer_mac, tid, ret);
		ath11k_dp_rx_tid_mem_free(ab, peer_mac, vdev_id, tid);
	}

	return ret;

err_mem_free:
	kfree(rx_tid->vaddr);
	rx_tid->vaddr = NULL;

	return ret;
}

int ath11k_dp_rx_ampdu_start(struct ath11k *ar,
			     struct ieee80211_ampdu_params *params)
{
	struct ath11k_base *ab = ar->ab;
	struct ath11k_sta *arsta = (void *)params->sta->drv_priv;
	int vdev_id = arsta->arvif->vdev_id;
	int ret;

	ret = ath11k_peer_rx_tid_setup(ar, params->sta->addr, vdev_id,
				       params->tid, params->buf_size,
				       params->ssn, arsta->pn_type);
	if (ret)
		ath11k_warn(ab, "failed to setup rx tid %d\n", ret);

	return ret;
}

int ath11k_dp_rx_ampdu_stop(struct ath11k *ar,
			    struct ieee80211_ampdu_params *params)
{
	struct ath11k_base *ab = ar->ab;
	struct ath11k_peer *peer;
	struct ath11k_sta *arsta = (void *)params->sta->drv_priv;
	int vdev_id = arsta->arvif->vdev_id;
	dma_addr_t paddr;
	bool active;
	int ret;

	spin_lock_bh(&ab->base_lock);

	peer = ath11k_peer_find(ab, vdev_id, params->sta->addr);
	if (!peer) {
		ath11k_warn(ab, "failed to find the peer to stop rx aggregation\n");
		spin_unlock_bh(&ab->base_lock);
		return -ENOENT;
	}

	paddr = peer->rx_tid[params->tid].paddr;
	active = peer->rx_tid[params->tid].active;

	if (!active) {
		spin_unlock_bh(&ab->base_lock);
		return 0;
	}

	ret = ath11k_peer_rx_tid_reo_update(ar, peer, peer->rx_tid, 1, 0, false);
	spin_unlock_bh(&ab->base_lock);
	if (ret) {
		ath11k_warn(ab, "failed to update reo for rx tid %d: %d\n",
			    params->tid, ret);
		return ret;
	}

	ret = ath11k_wmi_peer_rx_reorder_queue_setup(ar, vdev_id,
						     params->sta->addr, paddr,
						     params->tid, 1, 1);
	if (ret)
		ath11k_warn(ab, "failed to send wmi to delete rx tid %d\n",
			    ret);

	return ret;
}

int ath11k_dp_peer_rx_pn_replay_config(struct ath11k_vif *arvif,
				       const u8 *peer_addr,
				       enum set_key_cmd key_cmd,
				       struct ieee80211_key_conf *key)
{
	struct ath11k *ar = arvif->ar;
	struct ath11k_base *ab = ar->ab;
	struct ath11k_hal_reo_cmd cmd = {0};
	struct ath11k_peer *peer;
	struct dp_rx_tid *rx_tid;
	u8 tid;
	int ret = 0;

	/* NOTE: Enable PN/TSC replay check offload only for unicast frames.
	 * We use mac80211 PN/TSC replay check functionality for bcast/mcast
	 * for now.
	 */
	if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE))
		return 0;

	cmd.flag |= HAL_REO_CMD_FLG_NEED_STATUS;
	cmd.upd0 |= HAL_REO_CMD_UPD0_PN |
		    HAL_REO_CMD_UPD0_PN_SIZE |
		    HAL_REO_CMD_UPD0_PN_VALID |
		    HAL_REO_CMD_UPD0_PN_CHECK |
		    HAL_REO_CMD_UPD0_SVLD;

	switch (key->cipher) {
	case WLAN_CIPHER_SUITE_TKIP:
	case WLAN_CIPHER_SUITE_CCMP:
	case WLAN_CIPHER_SUITE_CCMP_256:
	case WLAN_CIPHER_SUITE_GCMP:
	case WLAN_CIPHER_SUITE_GCMP_256:
		if (key_cmd == SET_KEY) {
			cmd.upd1 |= HAL_REO_CMD_UPD1_PN_CHECK;
			cmd.pn_size = 48;
		}
		break;
	default:
		break;
	}

	spin_lock_bh(&ab->base_lock);

	peer = ath11k_peer_find(ab, arvif->vdev_id, peer_addr);
	if (!peer) {
		ath11k_warn(ab, "failed to find the peer to configure pn replay detection\n");
		spin_unlock_bh(&ab->base_lock);
		return -ENOENT;
	}

	for (tid = 0; tid <= IEEE80211_NUM_TIDS; tid++) {
		rx_tid = &peer->rx_tid[tid];
		if (!rx_tid->active)
			continue;
		cmd.addr_lo = lower_32_bits(rx_tid->paddr);
		cmd.addr_hi = upper_32_bits(rx_tid->paddr);
		ret = ath11k_dp_tx_send_reo_cmd(ab, rx_tid,
						HAL_REO_CMD_UPDATE_RX_QUEUE,
						&cmd, NULL);
		if (ret) {
			ath11k_warn(ab, "failed to configure rx tid %d queue for pn replay detection %d\n",
				    tid, ret);
			break;
		}
	}

	spin_unlock_bh(&ab->base_lock);

	return ret;
}

static inline int ath11k_get_ppdu_user_index(struct htt_ppdu_stats *ppdu_stats,
					     u16 peer_id)
{
	int i;

	for (i = 0; i < HTT_PPDU_STATS_MAX_USERS - 1; i++) {
		if (ppdu_stats->user_stats[i].is_valid_peer_id) {
			if (peer_id == ppdu_stats->user_stats[i].peer_id)
				return i;
		} else {
			return i;
		}
	}

	return -EINVAL;
}

static int ath11k_htt_tlv_ppdu_stats_parse(struct ath11k_base *ab,
					   u16 tag, u16 len, const void *ptr,
					   void *data)
{
	struct htt_ppdu_stats_info *ppdu_info;
	struct htt_ppdu_user_stats *user_stats;
	int cur_user;
	u16 peer_id;

	ppdu_info = (struct htt_ppdu_stats_info *)data;

	switch (tag) {
	case HTT_PPDU_STATS_TAG_COMMON:
		if (len < sizeof(struct htt_ppdu_stats_common)) {
			ath11k_warn(ab, "Invalid len %d for the tag 0x%x\n",
				    len, tag);
			return -EINVAL;
		}
		memcpy((void *)&ppdu_info->ppdu_stats.common, ptr,
		       sizeof(struct htt_ppdu_stats_common));
		break;
	case HTT_PPDU_STATS_TAG_USR_RATE:
		if (len < sizeof(struct htt_ppdu_stats_user_rate)) {
			ath11k_warn(ab, "Invalid len %d for the tag 0x%x\n",
				    len, tag);
			return -EINVAL;
		}

		peer_id = ((struct htt_ppdu_stats_user_rate *)ptr)->sw_peer_id;
		cur_user = ath11k_get_ppdu_user_index(&ppdu_info->ppdu_stats,
						      peer_id);
		if (cur_user < 0)
			return -EINVAL;
		user_stats = &ppdu_info->ppdu_stats.user_stats[cur_user];
		user_stats->peer_id = peer_id;
		user_stats->is_valid_peer_id = true;
		memcpy((void *)&user_stats->rate, ptr,
		       sizeof(struct htt_ppdu_stats_user_rate));
		user_stats->tlv_flags |= BIT(tag);
		break;
	case HTT_PPDU_STATS_TAG_USR_COMPLTN_COMMON:
		if (len < sizeof(struct htt_ppdu_stats_usr_cmpltn_cmn)) {
			ath11k_warn(ab, "Invalid len %d for the tag 0x%x\n",
				    len, tag);
			return -EINVAL;
		}

		peer_id = ((struct htt_ppdu_stats_usr_cmpltn_cmn *)ptr)->sw_peer_id;
		cur_user = ath11k_get_ppdu_user_index(&ppdu_info->ppdu_stats,
						      peer_id);
		if (cur_user < 0)
			return -EINVAL;
		user_stats = &ppdu_info->ppdu_stats.user_stats[cur_user];
		user_stats->peer_id = peer_id;
		user_stats->is_valid_peer_id = true;
		memcpy((void *)&user_stats->cmpltn_cmn, ptr,
		       sizeof(struct htt_ppdu_stats_usr_cmpltn_cmn));
		user_stats->tlv_flags |= BIT(tag);
		break;
	case HTT_PPDU_STATS_TAG_USR_COMPLTN_ACK_BA_STATUS:
		if (len <
		    sizeof(struct htt_ppdu_stats_usr_cmpltn_ack_ba_status)) {
			ath11k_warn(ab, "Invalid len %d for the tag 0x%x\n",
				    len, tag);
			return -EINVAL;
		}

		peer_id =
		((struct htt_ppdu_stats_usr_cmpltn_ack_ba_status *)ptr)->sw_peer_id;
		cur_user = ath11k_get_ppdu_user_index(&ppdu_info->ppdu_stats,
						      peer_id);
		if (cur_user < 0)
			return -EINVAL;
		user_stats = &ppdu_info->ppdu_stats.user_stats[cur_user];
		user_stats->peer_id = peer_id;
		user_stats->is_valid_peer_id = true;
		memcpy((void *)&user_stats->ack_ba, ptr,
		       sizeof(struct htt_ppdu_stats_usr_cmpltn_ack_ba_status));
		user_stats->tlv_flags |= BIT(tag);
		break;
	}
	return 0;
}

int ath11k_dp_htt_tlv_iter(struct ath11k_base *ab, const void *ptr, size_t len,
			   int (*iter)(struct ath11k_base *ar, u16 tag, u16 len,
				       const void *ptr, void *data),
			   void *data)
{
	const struct htt_tlv *tlv;
	const void *begin = ptr;
	u16 tlv_tag, tlv_len;
	int ret = -EINVAL;

	while (len > 0) {
		if (len < sizeof(*tlv)) {
			ath11k_err(ab, "htt tlv parse failure at byte %zd (%zu bytes left, %zu expected)\n",
				   ptr - begin, len, sizeof(*tlv));
			return -EINVAL;
		}
		tlv = (struct htt_tlv *)ptr;
		tlv_tag = FIELD_GET(HTT_TLV_TAG, tlv->header);
		tlv_len = FIELD_GET(HTT_TLV_LEN, tlv->header);
		ptr += sizeof(*tlv);
		len -= sizeof(*tlv);

		if (tlv_len > len) {
			ath11k_err(ab, "htt tlv parse failure of tag %u at byte %zd (%zu bytes left, %u expected)\n",
				   tlv_tag, ptr - begin, len, tlv_len);
			return -EINVAL;
		}
		ret = iter(ab, tlv_tag, tlv_len, ptr, data);
		if (ret == -ENOMEM)
			return ret;

		ptr += tlv_len;
		len -= tlv_len;
	}
	return 0;
}

static void
ath11k_update_per_peer_tx_stats(struct ath11k *ar,
				struct htt_ppdu_stats *ppdu_stats, u8 user)
{
	struct ath11k_base *ab = ar->ab;
	struct ath11k_peer *peer;
	struct ieee80211_sta *sta;
	struct ath11k_sta *arsta;
	struct htt_ppdu_stats_user_rate *user_rate;
	struct ath11k_per_peer_tx_stats *peer_stats = &ar->peer_tx_stats;
	struct htt_ppdu_user_stats *usr_stats = &ppdu_stats->user_stats[user];
	struct htt_ppdu_stats_common *common = &ppdu_stats->common;
	int ret;
	u8 flags, mcs, nss, bw, sgi, dcm, rate_idx = 0;
	u32 succ_bytes = 0;
	u16 rate = 0, succ_pkts = 0;
	u32 tx_duration = 0;
	u8 tid = HTT_PPDU_STATS_NON_QOS_TID;
	bool is_ampdu = false;

	if (!usr_stats)
		return;

	if (!(usr_stats->tlv_flags & BIT(HTT_PPDU_STATS_TAG_USR_RATE)))
		return;

	if (usr_stats->tlv_flags & BIT(HTT_PPDU_STATS_TAG_USR_COMPLTN_COMMON))
		is_ampdu =
			HTT_USR_CMPLTN_IS_AMPDU(usr_stats->cmpltn_cmn.flags);

	if (usr_stats->tlv_flags &
	    BIT(HTT_PPDU_STATS_TAG_USR_COMPLTN_ACK_BA_STATUS)) {
		succ_bytes = usr_stats->ack_ba.success_bytes;
		succ_pkts = FIELD_GET(HTT_PPDU_STATS_ACK_BA_INFO_NUM_MSDU_M,
				      usr_stats->ack_ba.info);
		tid = FIELD_GET(HTT_PPDU_STATS_ACK_BA_INFO_TID_NUM,
				usr_stats->ack_ba.info);
	}

	if (common->fes_duration_us)
		tx_duration = common->fes_duration_us;

	user_rate = &usr_stats->rate;
	flags = HTT_USR_RATE_PREAMBLE(user_rate->rate_flags);
	bw = HTT_USR_RATE_BW(user_rate->rate_flags) - 2;
	nss = HTT_USR_RATE_NSS(user_rate->rate_flags) + 1;
	mcs = HTT_USR_RATE_MCS(user_rate->rate_flags);
	sgi = HTT_USR_RATE_GI(user_rate->rate_flags);
	dcm = HTT_USR_RATE_DCM(user_rate->rate_flags);

	/* Note: If host configured fixed rates and in some other special
	 * cases, the broadcast/management frames are sent in different rates.
	 * Firmware rate's control to be skipped for this?
	 */

	if (flags == WMI_RATE_PREAMBLE_HE && mcs > ATH11K_HE_MCS_MAX) {
		ath11k_warn(ab, "Invalid HE mcs %d peer stats",  mcs);
		return;
	}

	if (flags == WMI_RATE_PREAMBLE_VHT && mcs > ATH11K_VHT_MCS_MAX) {
		ath11k_warn(ab, "Invalid VHT mcs %d peer stats",  mcs);
		return;
	}

	if (flags == WMI_RATE_PREAMBLE_HT && (mcs > ATH11K_HT_MCS_MAX || nss < 1)) {
		ath11k_warn(ab, "Invalid HT mcs %d nss %d peer stats",
			    mcs, nss);
		return;
	}

	if (flags == WMI_RATE_PREAMBLE_CCK || flags == WMI_RATE_PREAMBLE_OFDM) {
		ret = ath11k_mac_hw_ratecode_to_legacy_rate(mcs,
							    flags,
							    &rate_idx,
							    &rate);
		if (ret < 0)
			return;
	}

	rcu_read_lock();
	spin_lock_bh(&ab->base_lock);
	peer = ath11k_peer_find_by_id(ab, usr_stats->peer_id);

	if (!peer || !peer->sta) {
		spin_unlock_bh(&ab->base_lock);
		rcu_read_unlock();
		return;
	}

	sta = peer->sta;
	arsta = (struct ath11k_sta *)sta->drv_priv;

	memset(&arsta->txrate, 0, sizeof(arsta->txrate));

	switch (flags) {
	case WMI_RATE_PREAMBLE_OFDM:
		arsta->txrate.legacy = rate;
		break;
	case WMI_RATE_PREAMBLE_CCK:
		arsta->txrate.legacy = rate;
		break;
	case WMI_RATE_PREAMBLE_HT:
		arsta->txrate.mcs = mcs + 8 * (nss - 1);
		arsta->txrate.flags = RATE_INFO_FLAGS_MCS;
		if (sgi)
			arsta->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
		break;
	case WMI_RATE_PREAMBLE_VHT:
		arsta->txrate.mcs = mcs;
		arsta->txrate.flags = RATE_INFO_FLAGS_VHT_MCS;
		if (sgi)
			arsta->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
		break;
	case WMI_RATE_PREAMBLE_HE:
		arsta->txrate.mcs = mcs;
		arsta->txrate.flags = RATE_INFO_FLAGS_HE_MCS;
		arsta->txrate.he_dcm = dcm;
		arsta->txrate.he_gi = ath11k_mac_he_gi_to_nl80211_he_gi(sgi);
		arsta->txrate.he_ru_alloc = ath11k_mac_phy_he_ru_to_nl80211_he_ru_alloc
						((user_rate->ru_end -
						 user_rate->ru_start) + 1);
		break;
	}

	arsta->txrate.nss = nss;

	arsta->txrate.bw = ath11k_mac_bw_to_mac80211_bw(bw);
	arsta->tx_duration += tx_duration;
	memcpy(&arsta->last_txrate, &arsta->txrate, sizeof(struct rate_info));

	/* PPDU stats reported for mgmt packet doesn't have valid tx bytes.
	 * So skip peer stats update for mgmt packets.
	 */
	if (tid < HTT_PPDU_STATS_NON_QOS_TID) {
		memset(peer_stats, 0, sizeof(*peer_stats));
		peer_stats->succ_pkts = succ_pkts;
		peer_stats->succ_bytes = succ_bytes;
		peer_stats->is_ampdu = is_ampdu;
		peer_stats->duration = tx_duration;
		peer_stats->ba_fails =
			HTT_USR_CMPLTN_LONG_RETRY(usr_stats->cmpltn_cmn.flags) +
			HTT_USR_CMPLTN_SHORT_RETRY(usr_stats->cmpltn_cmn.flags);

		if (ath11k_debugfs_is_extd_tx_stats_enabled(ar))
			ath11k_debugfs_sta_add_tx_stats(arsta, peer_stats, rate_idx);
	}

	spin_unlock_bh(&ab->base_lock);
	rcu_read_unlock();
}

static void ath11k_htt_update_ppdu_stats(struct ath11k *ar,
					 struct htt_ppdu_stats *ppdu_stats)
{
	u8 user;

	for (user = 0; user < HTT_PPDU_STATS_MAX_USERS - 1; user++)
		ath11k_update_per_peer_tx_stats(ar, ppdu_stats, user);
}

static
struct htt_ppdu_stats_info *ath11k_dp_htt_get_ppdu_desc(struct ath11k *ar,
							u32 ppdu_id)
{
	struct htt_ppdu_stats_info *ppdu_info;

	lockdep_assert_held(&ar->data_lock);

	if (!list_empty(&ar->ppdu_stats_info)) {
		list_for_each_entry(ppdu_info, &ar->ppdu_stats_info, list) {
			if (ppdu_info->ppdu_id == ppdu_id)
				return ppdu_info;
		}

		if (ar->ppdu_stat_list_depth > HTT_PPDU_DESC_MAX_DEPTH) {
			ppdu_info = list_first_entry(&ar->ppdu_stats_info,
						     typeof(*ppdu_info), list);
			list_del(&ppdu_info->list);
			ar->ppdu_stat_list_depth--;
			ath11k_htt_update_ppdu_stats(ar, &ppdu_info->ppdu_stats);
			kfree(ppdu_info);
		}
	}

	ppdu_info = kzalloc(sizeof(*ppdu_info), GFP_ATOMIC);
	if (!ppdu_info)
		return NULL;

	list_add_tail(&ppdu_info->list, &ar->ppdu_stats_info);
	ar->ppdu_stat_list_depth++;

	return ppdu_info;
}

static int ath11k_htt_pull_ppdu_stats(struct ath11k_base *ab,
				      struct sk_buff *skb)
{
	struct ath11k_htt_ppdu_stats_msg *msg;
	struct htt_ppdu_stats_info *ppdu_info;
	struct ath11k *ar;
	int ret;
	u8 pdev_id;
	u32 ppdu_id, len;

	msg = (struct ath11k_htt_ppdu_stats_msg *)skb->data;
	len = FIELD_GET(HTT_T2H_PPDU_STATS_INFO_PAYLOAD_SIZE, msg->info);
	pdev_id = FIELD_GET(HTT_T2H_PPDU_STATS_INFO_PDEV_ID, msg->info);
	ppdu_id = msg->ppdu_id;

	rcu_read_lock();
	ar = ath11k_mac_get_ar_by_pdev_id(ab, pdev_id);
	if (!ar) {
		ret = -EINVAL;
		goto out;
	}

	if (ath11k_debugfs_is_pktlog_lite_mode_enabled(ar))
		trace_ath11k_htt_ppdu_stats(ar, skb->data, len);

	spin_lock_bh(&ar->data_lock);
	ppdu_info = ath11k_dp_htt_get_ppdu_desc(ar, ppdu_id);
	if (!ppdu_info) {
		ret = -EINVAL;
		goto out_unlock_data;
	}

	ppdu_info->ppdu_id = ppdu_id;
	ret = ath11k_dp_htt_tlv_iter(ab, msg->data, len,
				     ath11k_htt_tlv_ppdu_stats_parse,
				     (void *)ppdu_info);
	if (ret) {
		ath11k_warn(ab, "Failed to parse tlv %d\n", ret);
		goto out_unlock_data;
	}

out_unlock_data:
	spin_unlock_bh(&ar->data_lock);

out:
	rcu_read_unlock();

	return ret;
}

static void ath11k_htt_pktlog(struct ath11k_base *ab, struct sk_buff *skb)
{
	struct htt_pktlog_msg *data = (struct htt_pktlog_msg *)skb->data;
	struct ath_pktlog_hdr *hdr = (struct ath_pktlog_hdr *)data;
	struct ath11k *ar;
	u8 pdev_id;

	pdev_id = FIELD_GET(HTT_T2H_PPDU_STATS_INFO_PDEV_ID, data->hdr);
	ar = ath11k_mac_get_ar_by_pdev_id(ab, pdev_id);
	if (!ar) {
		ath11k_warn(ab, "invalid pdev id %d on htt pktlog\n", pdev_id);
		return;
	}

	trace_ath11k_htt_pktlog(ar, data->payload, hdr->size,
				ar->ab->pktlog_defs_checksum);
}

static void ath11k_htt_backpressure_event_handler(struct ath11k_base *ab,
						  struct sk_buff *skb)
{
	u32 *data = (u32 *)skb->data;
	u8 pdev_id, ring_type, ring_id, pdev_idx;
	u16 hp, tp;
	u32 backpressure_time;
	struct ath11k_bp_stats *bp_stats;

	pdev_id = FIELD_GET(HTT_BACKPRESSURE_EVENT_PDEV_ID_M, *data);
	ring_type = FIELD_GET(HTT_BACKPRESSURE_EVENT_RING_TYPE_M, *data);
	ring_id = FIELD_GET(HTT_BACKPRESSURE_EVENT_RING_ID_M, *data);
	++data;

	hp = FIELD_GET(HTT_BACKPRESSURE_EVENT_HP_M, *data);
	tp = FIELD_GET(HTT_BACKPRESSURE_EVENT_TP_M, *data);
	++data;

	backpressure_time = *data;

	ath11k_dbg(ab, ATH11K_DBG_DP_HTT, "backpressure event, pdev %d, ring type %d,ring id %d, hp %d tp %d, backpressure time %d\n",
		   pdev_id, ring_type, ring_id, hp, tp, backpressure_time);

	if (ring_type == HTT_BACKPRESSURE_UMAC_RING_TYPE) {
		if (ring_id >= HTT_SW_UMAC_RING_IDX_MAX)
			return;

		bp_stats = &ab->soc_stats.bp_stats.umac_ring_bp_stats[ring_id];
	} else if (ring_type == HTT_BACKPRESSURE_LMAC_RING_TYPE) {
		pdev_idx = DP_HW2SW_MACID(pdev_id);

		if (ring_id >= HTT_SW_LMAC_RING_IDX_MAX || pdev_idx >= MAX_RADIOS)
			return;

		bp_stats = &ab->soc_stats.bp_stats.lmac_ring_bp_stats[ring_id][pdev_idx];
	} else {
		ath11k_warn(ab, "unknown ring type received in htt bp event %d\n",
			    ring_type);
		return;
	}

	spin_lock_bh(&ab->base_lock);
	bp_stats->hp = hp;
	bp_stats->tp = tp;
	bp_stats->count++;
	bp_stats->jiffies = jiffies;
	spin_unlock_bh(&ab->base_lock);
}

void ath11k_dp_htt_htc_t2h_msg_handler(struct ath11k_base *ab,
				       struct sk_buff *skb)
{
	struct ath11k_dp *dp = &ab->dp;
	struct htt_resp_msg *resp = (struct htt_resp_msg *)skb->data;
	enum htt_t2h_msg_type type = FIELD_GET(HTT_T2H_MSG_TYPE, *(u32 *)resp);
	u16 peer_id;
	u8 vdev_id;
	u8 mac_addr[ETH_ALEN];
	u16 peer_mac_h16;
	u16 ast_hash;
	u16 hw_peer_id;

	ath11k_dbg(ab, ATH11K_DBG_DP_HTT, "dp_htt rx msg type :0x%0x\n", type);

	switch (type) {
	case HTT_T2H_MSG_TYPE_VERSION_CONF:
		dp->htt_tgt_ver_major = FIELD_GET(HTT_T2H_VERSION_CONF_MAJOR,
						  resp->version_msg.version);
		dp->htt_tgt_ver_minor = FIELD_GET(HTT_T2H_VERSION_CONF_MINOR,
						  resp->version_msg.version);
		complete(&dp->htt_tgt_version_received);
		break;
	case HTT_T2H_MSG_TYPE_PEER_MAP:
		vdev_id = FIELD_GET(HTT_T2H_PEER_MAP_INFO_VDEV_ID,
				    resp->peer_map_ev.info);
		peer_id = FIELD_GET(HTT_T2H_PEER_MAP_INFO_PEER_ID,
				    resp->peer_map_ev.info);
		peer_mac_h16 = FIELD_GET(HTT_T2H_PEER_MAP_INFO1_MAC_ADDR_H16,
					 resp->peer_map_ev.info1);
		ath11k_dp_get_mac_addr(resp->peer_map_ev.mac_addr_l32,
				       peer_mac_h16, mac_addr);
		ath11k_peer_map_event(ab, vdev_id, peer_id, mac_addr, 0, 0);
		break;
	case HTT_T2H_MSG_TYPE_PEER_MAP2:
		vdev_id = FIELD_GET(HTT_T2H_PEER_MAP_INFO_VDEV_ID,
				    resp->peer_map_ev.info);
		peer_id = FIELD_GET(HTT_T2H_PEER_MAP_INFO_PEER_ID,
				    resp->peer_map_ev.info);
		peer_mac_h16 = FIELD_GET(HTT_T2H_PEER_MAP_INFO1_MAC_ADDR_H16,
					 resp->peer_map_ev.info1);
		ath11k_dp_get_mac_addr(resp->peer_map_ev.mac_addr_l32,
				       peer_mac_h16, mac_addr);
		ast_hash = FIELD_GET(HTT_T2H_PEER_MAP_INFO2_AST_HASH_VAL,
				     resp->peer_map_ev.info2);
		hw_peer_id = FIELD_GET(HTT_T2H_PEER_MAP_INFO1_HW_PEER_ID,
				       resp->peer_map_ev.info1);
		ath11k_peer_map_event(ab, vdev_id, peer_id, mac_addr, ast_hash,
				      hw_peer_id);
		break;
	case HTT_T2H_MSG_TYPE_PEER_UNMAP:
	case HTT_T2H_MSG_TYPE_PEER_UNMAP2:
		peer_id = FIELD_GET(HTT_T2H_PEER_UNMAP_INFO_PEER_ID,
				    resp->peer_unmap_ev.info);
		ath11k_peer_unmap_event(ab, peer_id);
		break;
	case HTT_T2H_MSG_TYPE_PPDU_STATS_IND:
		ath11k_htt_pull_ppdu_stats(ab, skb);
		break;
	case HTT_T2H_MSG_TYPE_EXT_STATS_CONF:
		ath11k_debugfs_htt_ext_stats_handler(ab, skb);
		break;
	case HTT_T2H_MSG_TYPE_PKTLOG:
		ath11k_htt_pktlog(ab, skb);
		break;
	case HTT_T2H_MSG_TYPE_BKPRESSURE_EVENT_IND:
		ath11k_htt_backpressure_event_handler(ab, skb);
		break;
	default:
		ath11k_warn(ab, "htt event %d not handled\n", type);
		break;
	}

	dev_kfree_skb_any(skb);
}

static int ath11k_dp_rx_msdu_coalesce(struct ath11k *ar,
				      struct sk_buff_head *msdu_list,
				      struct sk_buff *first, struct sk_buff *last,
				      u8 l3pad_bytes, int msdu_len)
{
	struct ath11k_base *ab = ar->ab;
	struct sk_buff *skb;
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(first);
	int buf_first_hdr_len, buf_first_len;
	struct hal_rx_desc *ldesc;
	int space_extra, rem_len, buf_len;
	u32 hal_rx_desc_sz = ar->ab->hw_params.hal_desc_sz;

	/* As the msdu is spread across multiple rx buffers,
	 * find the offset to the start of msdu for computing
	 * the length of the msdu in the first buffer.
	 */
	buf_first_hdr_len = hal_rx_desc_sz + l3pad_bytes;
	buf_first_len = DP_RX_BUFFER_SIZE - buf_first_hdr_len;

	if (WARN_ON_ONCE(msdu_len <= buf_first_len)) {
		skb_put(first, buf_first_hdr_len + msdu_len);
		skb_pull(first, buf_first_hdr_len);
		return 0;
	}

	ldesc = (struct hal_rx_desc *)last->data;
	rxcb->is_first_msdu = ath11k_dp_rx_h_msdu_end_first_msdu(ab, ldesc);
	rxcb->is_last_msdu = ath11k_dp_rx_h_msdu_end_last_msdu(ab, ldesc);

	/* MSDU spans over multiple buffers because the length of the MSDU
	 * exceeds DP_RX_BUFFER_SIZE - HAL_RX_DESC_SIZE. So assume the data
	 * in the first buf is of length DP_RX_BUFFER_SIZE - HAL_RX_DESC_SIZE.
	 */
	skb_put(first, DP_RX_BUFFER_SIZE);
	skb_pull(first, buf_first_hdr_len);

	/* When an MSDU spread over multiple buffers attention, MSDU_END and
	 * MPDU_END tlvs are valid only in the last buffer. Copy those tlvs.
	 */
	ath11k_dp_rx_desc_end_tlv_copy(ab, rxcb->rx_desc, ldesc);

	space_extra = msdu_len - (buf_first_len + skb_tailroom(first));
	if (space_extra > 0 &&
	    (pskb_expand_head(first, 0, space_extra, GFP_ATOMIC) < 0)) {
		/* Free up all buffers of the MSDU */
		while ((skb = __skb_dequeue(msdu_list)) != NULL) {
			rxcb = ATH11K_SKB_RXCB(skb);
			if (!rxcb->is_continuation) {
				dev_kfree_skb_any(skb);
				break;
			}
			dev_kfree_skb_any(skb);
		}
		return -ENOMEM;
	}

	rem_len = msdu_len - buf_first_len;
	while ((skb = __skb_dequeue(msdu_list)) != NULL && rem_len > 0) {
		rxcb = ATH11K_SKB_RXCB(skb);
		if (rxcb->is_continuation)
			buf_len = DP_RX_BUFFER_SIZE - hal_rx_desc_sz;
		else
			buf_len = rem_len;

		if (buf_len > (DP_RX_BUFFER_SIZE - hal_rx_desc_sz)) {
			WARN_ON_ONCE(1);
			dev_kfree_skb_any(skb);
			return -EINVAL;
		}

		skb_put(skb, buf_len + hal_rx_desc_sz);
		skb_pull(skb, hal_rx_desc_sz);
		skb_copy_from_linear_data(skb, skb_put(first, buf_len),
					  buf_len);
		dev_kfree_skb_any(skb);

		rem_len -= buf_len;
		if (!rxcb->is_continuation)
			break;
	}

	return 0;
}

static struct sk_buff *ath11k_dp_rx_get_msdu_last_buf(struct sk_buff_head *msdu_list,
						      struct sk_buff *first)
{
	struct sk_buff *skb;
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(first);

	if (!rxcb->is_continuation)
		return first;

	skb_queue_walk(msdu_list, skb) {
		rxcb = ATH11K_SKB_RXCB(skb);
		if (!rxcb->is_continuation)
			return skb;
	}

	return NULL;
}

static void ath11k_dp_rx_h_csum_offload(struct ath11k *ar, struct sk_buff *msdu)
{
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(msdu);
	struct rx_attention *rx_attention;
	bool ip_csum_fail, l4_csum_fail;

	rx_attention = ath11k_dp_rx_get_attention(ar->ab, rxcb->rx_desc);
	ip_csum_fail = ath11k_dp_rx_h_attn_ip_cksum_fail(rx_attention);
	l4_csum_fail = ath11k_dp_rx_h_attn_l4_cksum_fail(rx_attention);

	msdu->ip_summed = (ip_csum_fail || l4_csum_fail) ?
			  CHECKSUM_NONE : CHECKSUM_UNNECESSARY;
}

static int ath11k_dp_rx_crypto_mic_len(struct ath11k *ar,
				       enum hal_encrypt_type enctype)
{
	switch (enctype) {
	case HAL_ENCRYPT_TYPE_OPEN:
	case HAL_ENCRYPT_TYPE_TKIP_NO_MIC:
	case HAL_ENCRYPT_TYPE_TKIP_MIC:
		return 0;
	case HAL_ENCRYPT_TYPE_CCMP_128:
		return IEEE80211_CCMP_MIC_LEN;
	case HAL_ENCRYPT_TYPE_CCMP_256:
		return IEEE80211_CCMP_256_MIC_LEN;
	case HAL_ENCRYPT_TYPE_GCMP_128:
	case HAL_ENCRYPT_TYPE_AES_GCMP_256:
		return IEEE80211_GCMP_MIC_LEN;
	case HAL_ENCRYPT_TYPE_WEP_40:
	case HAL_ENCRYPT_TYPE_WEP_104:
	case HAL_ENCRYPT_TYPE_WEP_128:
	case HAL_ENCRYPT_TYPE_WAPI_GCM_SM4:
	case HAL_ENCRYPT_TYPE_WAPI:
		break;
	}

	ath11k_warn(ar->ab, "unsupported encryption type %d for mic len\n", enctype);
	return 0;
}

static int ath11k_dp_rx_crypto_param_len(struct ath11k *ar,
					 enum hal_encrypt_type enctype)
{
	switch (enctype) {
	case HAL_ENCRYPT_TYPE_OPEN:
		return 0;
	case HAL_ENCRYPT_TYPE_TKIP_NO_MIC:
	case HAL_ENCRYPT_TYPE_TKIP_MIC:
		return IEEE80211_TKIP_IV_LEN;
	case HAL_ENCRYPT_TYPE_CCMP_128:
		return IEEE80211_CCMP_HDR_LEN;
	case HAL_ENCRYPT_TYPE_CCMP_256:
		return IEEE80211_CCMP_256_HDR_LEN;
	case HAL_ENCRYPT_TYPE_GCMP_128:
	case HAL_ENCRYPT_TYPE_AES_GCMP_256:
		return IEEE80211_GCMP_HDR_LEN;
	case HAL_ENCRYPT_TYPE_WEP_40:
	case HAL_ENCRYPT_TYPE_WEP_104:
	case HAL_ENCRYPT_TYPE_WEP_128:
	case HAL_ENCRYPT_TYPE_WAPI_GCM_SM4:
	case HAL_ENCRYPT_TYPE_WAPI:
		break;
	}

	ath11k_warn(ar->ab, "unsupported encryption type %d\n", enctype);
	return 0;
}

static int ath11k_dp_rx_crypto_icv_len(struct ath11k *ar,
				       enum hal_encrypt_type enctype)
{
	switch (enctype) {
	case HAL_ENCRYPT_TYPE_OPEN:
	case HAL_ENCRYPT_TYPE_CCMP_128:
	case HAL_ENCRYPT_TYPE_CCMP_256:
	case HAL_ENCRYPT_TYPE_GCMP_128:
	case HAL_ENCRYPT_TYPE_AES_GCMP_256:
		return 0;
	case HAL_ENCRYPT_TYPE_TKIP_NO_MIC:
	case HAL_ENCRYPT_TYPE_TKIP_MIC:
		return IEEE80211_TKIP_ICV_LEN;
	case HAL_ENCRYPT_TYPE_WEP_40:
	case HAL_ENCRYPT_TYPE_WEP_104:
	case HAL_ENCRYPT_TYPE_WEP_128:
	case HAL_ENCRYPT_TYPE_WAPI_GCM_SM4:
	case HAL_ENCRYPT_TYPE_WAPI:
		break;
	}

	ath11k_warn(ar->ab, "unsupported encryption type %d\n", enctype);
	return 0;
}

static void ath11k_dp_rx_h_undecap_nwifi(struct ath11k *ar,
					 struct sk_buff *msdu,
					 u8 *first_hdr,
					 enum hal_encrypt_type enctype,
					 struct ieee80211_rx_status *status)
{
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(msdu);
	u8 decap_hdr[DP_MAX_NWIFI_HDR_LEN];
	struct ieee80211_hdr *hdr;
	size_t hdr_len;
	u8 da[ETH_ALEN];
	u8 sa[ETH_ALEN];
	u16 qos_ctl = 0;
	u8 *qos;

	/* copy SA & DA and pull decapped header */
	hdr = (struct ieee80211_hdr *)msdu->data;
	hdr_len = ieee80211_hdrlen(hdr->frame_control);
	ether_addr_copy(da, ieee80211_get_DA(hdr));
	ether_addr_copy(sa, ieee80211_get_SA(hdr));
	skb_pull(msdu, ieee80211_hdrlen(hdr->frame_control));

	if (rxcb->is_first_msdu) {
		/* original 802.11 header is valid for the first msdu
		 * hence we can reuse the same header
		 */
		hdr = (struct ieee80211_hdr *)first_hdr;
		hdr_len = ieee80211_hdrlen(hdr->frame_control);

		/* Each A-MSDU subframe will be reported as a separate MSDU,
		 * so strip the A-MSDU bit from QoS Ctl.
		 */
		if (ieee80211_is_data_qos(hdr->frame_control)) {
			qos = ieee80211_get_qos_ctl(hdr);
			qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;
		}
	} else {
		/*  Rebuild qos header if this is a middle/last msdu */
		hdr->frame_control |= __cpu_to_le16(IEEE80211_STYPE_QOS_DATA);

		/* Reset the order bit as the HT_Control header is stripped */
		hdr->frame_control &= ~(__cpu_to_le16(IEEE80211_FCTL_ORDER));

		qos_ctl = rxcb->tid;

		if (ath11k_dp_rx_h_msdu_start_mesh_ctl_present(ar->ab, rxcb->rx_desc))
			qos_ctl |= IEEE80211_QOS_CTL_MESH_CONTROL_PRESENT;

		/* TODO Add other QoS ctl fields when required */

		/* copy decap header before overwriting for reuse below */
		memcpy(decap_hdr, (uint8_t *)hdr, hdr_len);
	}

	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
		memcpy(skb_push(msdu,
				ath11k_dp_rx_crypto_param_len(ar, enctype)),
		       (void *)hdr + hdr_len,
		       ath11k_dp_rx_crypto_param_len(ar, enctype));
	}

	if (!rxcb->is_first_msdu) {
		memcpy(skb_push(msdu,
				IEEE80211_QOS_CTL_LEN), &qos_ctl,
				IEEE80211_QOS_CTL_LEN);
		memcpy(skb_push(msdu, hdr_len), decap_hdr, hdr_len);
		return;
	}

	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);

	/* original 802.11 header has a different DA and in
	 * case of 4addr it may also have different SA
	 */
	hdr = (struct ieee80211_hdr *)msdu->data;
	ether_addr_copy(ieee80211_get_DA(hdr), da);
	ether_addr_copy(ieee80211_get_SA(hdr), sa);
}

static void ath11k_dp_rx_h_undecap_raw(struct ath11k *ar, struct sk_buff *msdu,
				       enum hal_encrypt_type enctype,
				       struct ieee80211_rx_status *status,
				       bool decrypted)
{
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(msdu);
	struct ieee80211_hdr *hdr;
	size_t hdr_len;
	size_t crypto_len;

	if (!rxcb->is_first_msdu ||
	    !(rxcb->is_first_msdu && rxcb->is_last_msdu)) {
		WARN_ON_ONCE(1);
		return;
	}

	skb_trim(msdu, msdu->len - FCS_LEN);

	if (!decrypted)
		return;

	hdr = (void *)msdu->data;

	/* Tail */
	if (status->flag & RX_FLAG_IV_STRIPPED) {
		skb_trim(msdu, msdu->len -
			 ath11k_dp_rx_crypto_mic_len(ar, enctype));

		skb_trim(msdu, msdu->len -
			 ath11k_dp_rx_crypto_icv_len(ar, enctype));
	} else {
		/* MIC */
		if (status->flag & RX_FLAG_MIC_STRIPPED)
			skb_trim(msdu, msdu->len -
				 ath11k_dp_rx_crypto_mic_len(ar, enctype));

		/* ICV */
		if (status->flag & RX_FLAG_ICV_STRIPPED)
			skb_trim(msdu, msdu->len -
				 ath11k_dp_rx_crypto_icv_len(ar, enctype));
	}

	/* MMIC */
	if ((status->flag & RX_FLAG_MMIC_STRIPPED) &&
	    !ieee80211_has_morefrags(hdr->frame_control) &&
	    enctype == HAL_ENCRYPT_TYPE_TKIP_MIC)
		skb_trim(msdu, msdu->len - IEEE80211_CCMP_MIC_LEN);

	/* Head */
	if (status->flag & RX_FLAG_IV_STRIPPED) {
		hdr_len = ieee80211_hdrlen(hdr->frame_control);
		crypto_len = ath11k_dp_rx_crypto_param_len(ar, enctype);

		memmove((void *)msdu->data + crypto_len,
			(void *)msdu->data, hdr_len);
		skb_pull(msdu, crypto_len);
	}
}

static void *ath11k_dp_rx_h_find_rfc1042(struct ath11k *ar,
					 struct sk_buff *msdu,
					 enum hal_encrypt_type enctype)
{
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(msdu);
	struct ieee80211_hdr *hdr;
	size_t hdr_len, crypto_len;
	void *rfc1042;
	bool is_amsdu;

	is_amsdu = !(rxcb->is_first_msdu && rxcb->is_last_msdu);
	hdr = (struct ieee80211_hdr *)ath11k_dp_rx_h_80211_hdr(ar->ab, rxcb->rx_desc);
	rfc1042 = hdr;

	if (rxcb->is_first_msdu) {
		hdr_len = ieee80211_hdrlen(hdr->frame_control);
		crypto_len = ath11k_dp_rx_crypto_param_len(ar, enctype);

		rfc1042 += hdr_len + crypto_len;
	}

	if (is_amsdu)
		rfc1042 += sizeof(struct ath11k_dp_amsdu_subframe_hdr);

	return rfc1042;
}

static void ath11k_dp_rx_h_undecap_eth(struct ath11k *ar,
				       struct sk_buff *msdu,
				       u8 *first_hdr,
				       enum hal_encrypt_type enctype,
				       struct ieee80211_rx_status *status)
{
	struct ieee80211_hdr *hdr;
	struct ethhdr *eth;
	size_t hdr_len;
	u8 da[ETH_ALEN];
	u8 sa[ETH_ALEN];
	void *rfc1042;

	rfc1042 = ath11k_dp_rx_h_find_rfc1042(ar, msdu, enctype);
	if (WARN_ON_ONCE(!rfc1042))
		return;

	/* pull decapped header and copy SA & DA */
	eth = (struct ethhdr *)msdu->data;
	ether_addr_copy(da, eth->h_dest);
	ether_addr_copy(sa, eth->h_source);
	skb_pull(msdu, sizeof(struct ethhdr));

	/* push rfc1042/llc/snap */
	memcpy(skb_push(msdu, sizeof(struct ath11k_dp_rfc1042_hdr)), rfc1042,
	       sizeof(struct ath11k_dp_rfc1042_hdr));

	/* push original 802.11 header */
	hdr = (struct ieee80211_hdr *)first_hdr;
	hdr_len = ieee80211_hdrlen(hdr->frame_control);

	if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
		memcpy(skb_push(msdu,
				ath11k_dp_rx_crypto_param_len(ar, enctype)),
		       (void *)hdr + hdr_len,
		       ath11k_dp_rx_crypto_param_len(ar, enctype));
	}

	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);

	/* original 802.11 header has a different DA and in
	 * case of 4addr it may also have different SA
	 */
	hdr = (struct ieee80211_hdr *)msdu->data;
	ether_addr_copy(ieee80211_get_DA(hdr), da);
	ether_addr_copy(ieee80211_get_SA(hdr), sa);
}

static void ath11k_dp_rx_h_undecap(struct ath11k *ar, struct sk_buff *msdu,
				   struct hal_rx_desc *rx_desc,
				   enum hal_encrypt_type enctype,
				   struct ieee80211_rx_status *status,
				   bool decrypted)
{
	u8 *first_hdr;
	u8 decap;
	struct ethhdr *ehdr;

	first_hdr = ath11k_dp_rx_h_80211_hdr(ar->ab, rx_desc);
	decap = ath11k_dp_rx_h_msdu_start_decap_type(ar->ab, rx_desc);

	switch (decap) {
	case DP_RX_DECAP_TYPE_NATIVE_WIFI:
		ath11k_dp_rx_h_undecap_nwifi(ar, msdu, first_hdr,
					     enctype, status);
		break;
	case DP_RX_DECAP_TYPE_RAW:
		ath11k_dp_rx_h_undecap_raw(ar, msdu, enctype, status,
					   decrypted);
		break;
	case DP_RX_DECAP_TYPE_ETHERNET2_DIX:
		ehdr = (struct ethhdr *)msdu->data;

		/* mac80211 allows fast path only for authorized STA */
		if (ehdr->h_proto == cpu_to_be16(ETH_P_PAE)) {
			ATH11K_SKB_RXCB(msdu)->is_eapol = true;
			ath11k_dp_rx_h_undecap_eth(ar, msdu, first_hdr,
						   enctype, status);
			break;
		}

		/* PN for mcast packets will be validated in mac80211;
		 * remove eth header and add 802.11 header.
		 */
		if (ATH11K_SKB_RXCB(msdu)->is_mcbc && decrypted)
			ath11k_dp_rx_h_undecap_eth(ar, msdu, first_hdr,
						   enctype, status);
		break;
	case DP_RX_DECAP_TYPE_8023:
		/* TODO: Handle undecap for these formats */
		break;
	}
}

static struct ath11k_peer *
ath11k_dp_rx_h_find_peer(struct ath11k_base *ab, struct sk_buff *msdu)
{
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(msdu);
	struct hal_rx_desc *rx_desc = rxcb->rx_desc;
	struct ath11k_peer *peer = NULL;

	lockdep_assert_held(&ab->base_lock);

	if (rxcb->peer_id)
		peer = ath11k_peer_find_by_id(ab, rxcb->peer_id);

	if (peer)
		return peer;

	if (!rx_desc || !(ath11k_dp_rxdesc_mac_addr2_valid(ab, rx_desc)))
		return NULL;

	peer = ath11k_peer_find_by_addr(ab,
					ath11k_dp_rxdesc_mpdu_start_addr2(ab, rx_desc));
	return peer;
}

static void ath11k_dp_rx_h_mpdu(struct ath11k *ar,
				struct sk_buff *msdu,
				struct hal_rx_desc *rx_desc,
				struct ieee80211_rx_status *rx_status)
{
	bool  fill_crypto_hdr;
	enum hal_encrypt_type enctype;
	bool is_decrypted = false;
	struct ath11k_skb_rxcb *rxcb;
	struct ieee80211_hdr *hdr;
	struct ath11k_peer *peer;
	struct rx_attention *rx_attention;
	u32 err_bitmap;

	/* PN for multicast packets will be checked in mac80211 */
	rxcb = ATH11K_SKB_RXCB(msdu);
	fill_crypto_hdr = ath11k_dp_rx_h_attn_is_mcbc(ar->ab, rx_desc);
	rxcb->is_mcbc = fill_crypto_hdr;

	if (rxcb->is_mcbc) {
		rxcb->peer_id = ath11k_dp_rx_h_mpdu_start_peer_id(ar->ab, rx_desc);
		rxcb->seq_no = ath11k_dp_rx_h_mpdu_start_seq_no(ar->ab, rx_desc);
	}

	spin_lock_bh(&ar->ab->base_lock);
	peer = ath11k_dp_rx_h_find_peer(ar->ab, msdu);
	if (peer) {
		if (rxcb->is_mcbc)
			enctype = peer->sec_type_grp;
		else
			enctype = peer->sec_type;
	} else {
		enctype = ath11k_dp_rx_h_mpdu_start_enctype(ar->ab, rx_desc);
	}
	spin_unlock_bh(&ar->ab->base_lock);

	rx_attention = ath11k_dp_rx_get_attention(ar->ab, rx_desc);
	err_bitmap = ath11k_dp_rx_h_attn_mpdu_err(rx_attention);
	if (enctype != HAL_ENCRYPT_TYPE_OPEN && !err_bitmap)
		is_decrypted = ath11k_dp_rx_h_attn_is_decrypted(rx_attention);

	/* Clear per-MPDU flags while leaving per-PPDU flags intact */
	rx_status->flag &= ~(RX_FLAG_FAILED_FCS_CRC |
			     RX_FLAG_MMIC_ERROR |
			     RX_FLAG_DECRYPTED |
			     RX_FLAG_IV_STRIPPED |
			     RX_FLAG_MMIC_STRIPPED);

	if (err_bitmap & DP_RX_MPDU_ERR_FCS)
		rx_status->flag |= RX_FLAG_FAILED_FCS_CRC;
	if (err_bitmap & DP_RX_MPDU_ERR_TKIP_MIC)
		rx_status->flag |= RX_FLAG_MMIC_ERROR;

	if (is_decrypted) {
		rx_status->flag |= RX_FLAG_DECRYPTED | RX_FLAG_MMIC_STRIPPED;

		if (fill_crypto_hdr)
			rx_status->flag |= RX_FLAG_MIC_STRIPPED |
					RX_FLAG_ICV_STRIPPED;
		else
			rx_status->flag |= RX_FLAG_IV_STRIPPED |
					   RX_FLAG_PN_VALIDATED;
	}

	ath11k_dp_rx_h_csum_offload(ar, msdu);
	ath11k_dp_rx_h_undecap(ar, msdu, rx_desc,
			       enctype, rx_status, is_decrypted);

	if (!is_decrypted || fill_crypto_hdr)
		return;

	if (ath11k_dp_rx_h_msdu_start_decap_type(ar->ab, rx_desc) !=
	    DP_RX_DECAP_TYPE_ETHERNET2_DIX) {
		hdr = (void *)msdu->data;
		hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
	}
}

static void ath11k_dp_rx_h_rate(struct ath11k *ar, struct hal_rx_desc *rx_desc,
				struct ieee80211_rx_status *rx_status)
{
	struct ieee80211_supported_band *sband;
	enum rx_msdu_start_pkt_type pkt_type;
	u8 bw;
	u8 rate_mcs, nss;
	u8 sgi;
	bool is_cck, is_ldpc;

	pkt_type = ath11k_dp_rx_h_msdu_start_pkt_type(ar->ab, rx_desc);
	bw = ath11k_dp_rx_h_msdu_start_rx_bw(ar->ab, rx_desc);
	rate_mcs = ath11k_dp_rx_h_msdu_start_rate_mcs(ar->ab, rx_desc);
	nss = ath11k_dp_rx_h_msdu_start_nss(ar->ab, rx_desc);
	sgi = ath11k_dp_rx_h_msdu_start_sgi(ar->ab, rx_desc);

	switch (pkt_type) {
	case RX_MSDU_START_PKT_TYPE_11A:
	case RX_MSDU_START_PKT_TYPE_11B:
		is_cck = (pkt_type == RX_MSDU_START_PKT_TYPE_11B);
		sband = &ar->mac.sbands[rx_status->band];
		rx_status->rate_idx = ath11k_mac_hw_rate_to_idx(sband, rate_mcs,
								is_cck);
		break;
	case RX_MSDU_START_PKT_TYPE_11N:
		rx_status->encoding = RX_ENC_HT;
		if (rate_mcs > ATH11K_HT_MCS_MAX) {
			ath11k_warn(ar->ab,
				    "Received with invalid mcs in HT mode %d\n",
				     rate_mcs);
			break;
		}
		rx_status->rate_idx = rate_mcs + (8 * (nss - 1));
		if (sgi)
			rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
		rx_status->bw = ath11k_mac_bw_to_mac80211_bw(bw);
		break;
	case RX_MSDU_START_PKT_TYPE_11AC:
		rx_status->encoding = RX_ENC_VHT;
		rx_status->rate_idx = rate_mcs;
		if (rate_mcs > ATH11K_VHT_MCS_MAX) {
			ath11k_warn(ar->ab,
				    "Received with invalid mcs in VHT mode %d\n",
				     rate_mcs);
			break;
		}
		rx_status->nss = nss;
		if (sgi)
			rx_status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
		rx_status->bw = ath11k_mac_bw_to_mac80211_bw(bw);
		is_ldpc = ath11k_dp_rx_h_msdu_start_ldpc_support(ar->ab, rx_desc);
		if (is_ldpc)
			rx_status->enc_flags |= RX_ENC_FLAG_LDPC;
		break;
	case RX_MSDU_START_PKT_TYPE_11AX:
		rx_status->rate_idx = rate_mcs;
		if (rate_mcs > ATH11K_HE_MCS_MAX) {
			ath11k_warn(ar->ab,
				    "Received with invalid mcs in HE mode %d\n",
				    rate_mcs);
			break;
		}
		rx_status->encoding = RX_ENC_HE;
		rx_status->nss = nss;
		rx_status->he_gi = ath11k_mac_he_gi_to_nl80211_he_gi(sgi);
		rx_status->bw = ath11k_mac_bw_to_mac80211_bw(bw);
		break;
	}
}

static void ath11k_dp_rx_h_ppdu(struct ath11k *ar, struct hal_rx_desc *rx_desc,
				struct ieee80211_rx_status *rx_status)
{
	u8 channel_num;
	u32 center_freq, meta_data;
	struct ieee80211_channel *channel;

	rx_status->freq = 0;
	rx_status->rate_idx = 0;
	rx_status->nss = 0;
	rx_status->encoding = RX_ENC_LEGACY;
	rx_status->bw = RATE_INFO_BW_20;

	rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;

	meta_data = ath11k_dp_rx_h_msdu_start_freq(ar->ab, rx_desc);
	channel_num = meta_data;
	center_freq = meta_data >> 16;

	if (center_freq >= ATH11K_MIN_6G_FREQ &&
	    center_freq <= ATH11K_MAX_6G_FREQ) {
		rx_status->band = NL80211_BAND_6GHZ;
		rx_status->freq = center_freq;
	} else if (channel_num >= 1 && channel_num <= 14) {
		rx_status->band = NL80211_BAND_2GHZ;
	} else if (channel_num >= 36 && channel_num <= 177) {
		rx_status->band = NL80211_BAND_5GHZ;
	} else {
		spin_lock_bh(&ar->data_lock);
		channel = ar->rx_channel;
		if (channel) {
			rx_status->band = channel->band;
			channel_num =
				ieee80211_frequency_to_channel(channel->center_freq);
		}
		spin_unlock_bh(&ar->data_lock);
		ath11k_dbg_dump(ar->ab, ATH11K_DBG_DATA, NULL, "rx_desc: ",
				rx_desc, sizeof(struct hal_rx_desc));
	}

	if (rx_status->band != NL80211_BAND_6GHZ)
		rx_status->freq = ieee80211_channel_to_frequency(channel_num,
								 rx_status->band);

	ath11k_dp_rx_h_rate(ar, rx_desc, rx_status);
}

static void ath11k_dp_rx_deliver_msdu(struct ath11k *ar, struct napi_struct *napi,
				      struct sk_buff *msdu,
				      struct ieee80211_rx_status *status)
{
	static const struct ieee80211_radiotap_he known = {
		.data1 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA1_DATA_MCS_KNOWN |
				     IEEE80211_RADIOTAP_HE_DATA1_BW_RU_ALLOC_KNOWN),
		.data2 = cpu_to_le16(IEEE80211_RADIOTAP_HE_DATA2_GI_KNOWN),
	};
	struct ieee80211_rx_status *rx_status;
	struct ieee80211_radiotap_he *he = NULL;
	struct ieee80211_sta *pubsta = NULL;
	struct ath11k_peer *peer;
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(msdu);
	u8 decap = DP_RX_DECAP_TYPE_RAW;
	bool is_mcbc = rxcb->is_mcbc;
	bool is_eapol = rxcb->is_eapol;

	if (status->encoding == RX_ENC_HE &&
	    !(status->flag & RX_FLAG_RADIOTAP_HE) &&
	    !(status->flag & RX_FLAG_SKIP_MONITOR)) {
		he = skb_push(msdu, sizeof(known));
		memcpy(he, &known, sizeof(known));
		status->flag |= RX_FLAG_RADIOTAP_HE;
	}

	if (!(status->flag & RX_FLAG_ONLY_MONITOR))
		decap = ath11k_dp_rx_h_msdu_start_decap_type(ar->ab, rxcb->rx_desc);

	spin_lock_bh(&ar->ab->base_lock);
	peer = ath11k_dp_rx_h_find_peer(ar->ab, msdu);
	if (peer && peer->sta)
		pubsta = peer->sta;
	spin_unlock_bh(&ar->ab->base_lock);

	ath11k_dbg(ar->ab, ATH11K_DBG_DATA,
		   "rx skb %p len %u peer %pM %d %s sn %u %s%s%s%s%s%s%s %srate_idx %u vht_nss %u freq %u band %u flag 0x%x fcs-err %i mic-err %i amsdu-more %i\n",
		   msdu,
		   msdu->len,
		   peer ? peer->addr : NULL,
		   rxcb->tid,
		   is_mcbc ? "mcast" : "ucast",
		   rxcb->seq_no,
		   (status->encoding == RX_ENC_LEGACY) ? "legacy" : "",
		   (status->encoding == RX_ENC_HT) ? "ht" : "",
		   (status->encoding == RX_ENC_VHT) ? "vht" : "",
		   (status->encoding == RX_ENC_HE) ? "he" : "",
		   (status->bw == RATE_INFO_BW_40) ? "40" : "",
		   (status->bw == RATE_INFO_BW_80) ? "80" : "",
		   (status->bw == RATE_INFO_BW_160) ? "160" : "",
		   status->enc_flags & RX_ENC_FLAG_SHORT_GI ? "sgi " : "",
		   status->rate_idx,
		   status->nss,
		   status->freq,
		   status->band, status->flag,
		   !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
		   !!(status->flag & RX_FLAG_MMIC_ERROR),
		   !!(status->flag & RX_FLAG_AMSDU_MORE));

	ath11k_dbg_dump(ar->ab, ATH11K_DBG_DP_RX, NULL, "dp rx msdu: ",
			msdu->data, msdu->len);

	rx_status = IEEE80211_SKB_RXCB(msdu);
	*rx_status = *status;

	/* TODO: trace rx packet */

	/* PN for multicast packets are not validate in HW,
	 * so skip 802.3 rx path
	 * Also, fast_rx expects the STA to be authorized, hence
	 * eapol packets are sent in slow path.
	 */
	if (decap == DP_RX_DECAP_TYPE_ETHERNET2_DIX && !is_eapol &&
	    !(is_mcbc && rx_status->flag & RX_FLAG_DECRYPTED))
		rx_status->flag |= RX_FLAG_8023;

	ieee80211_rx_napi(ar->hw, pubsta, msdu, napi);
}

static int ath11k_dp_rx_process_msdu(struct ath11k *ar,
				     struct sk_buff *msdu,
				     struct sk_buff_head *msdu_list,
				     struct ieee80211_rx_status *rx_status)
{
	struct ath11k_base *ab = ar->ab;
	struct hal_rx_desc *rx_desc, *lrx_desc;
	struct rx_attention *rx_attention;
	struct ath11k_skb_rxcb *rxcb;
	struct sk_buff *last_buf;
	u8 l3_pad_bytes;
	u8 *hdr_status;
	u16 msdu_len;
	int ret;
	u32 hal_rx_desc_sz = ar->ab->hw_params.hal_desc_sz;

	last_buf = ath11k_dp_rx_get_msdu_last_buf(msdu_list, msdu);
	if (!last_buf) {
		ath11k_warn(ab,
			    "No valid Rx buffer to access Atten/MSDU_END/MPDU_END tlvs\n");
		ret = -EIO;
		goto free_out;
	}

	rx_desc = (struct hal_rx_desc *)msdu->data;
	if (ath11k_dp_rx_h_attn_msdu_len_err(ab, rx_desc)) {
		ath11k_warn(ar->ab, "msdu len not valid\n");
		ret = -EIO;
		goto free_out;
	}

	lrx_desc = (struct hal_rx_desc *)last_buf->data;
	rx_attention = ath11k_dp_rx_get_attention(ab, lrx_desc);
	if (!ath11k_dp_rx_h_attn_msdu_done(rx_attention)) {
		ath11k_warn(ab, "msdu_done bit in attention is not set\n");
		ret = -EIO;
		goto free_out;
	}

	rxcb = ATH11K_SKB_RXCB(msdu);
	rxcb->rx_desc = rx_desc;
	msdu_len = ath11k_dp_rx_h_msdu_start_msdu_len(ab, rx_desc);
	l3_pad_bytes = ath11k_dp_rx_h_msdu_end_l3pad(ab, lrx_desc);

	if (rxcb->is_frag) {
		skb_pull(msdu, hal_rx_desc_sz);
	} else if (!rxcb->is_continuation) {
		if ((msdu_len + hal_rx_desc_sz) > DP_RX_BUFFER_SIZE) {
			hdr_status = ath11k_dp_rx_h_80211_hdr(ab, rx_desc);
			ret = -EINVAL;
			ath11k_warn(ab, "invalid msdu len %u\n", msdu_len);
			ath11k_dbg_dump(ab, ATH11K_DBG_DATA, NULL, "", hdr_status,
					sizeof(struct ieee80211_hdr));
			ath11k_dbg_dump(ab, ATH11K_DBG_DATA, NULL, "", rx_desc,
					sizeof(struct hal_rx_desc));
			goto free_out;
		}
		skb_put(msdu, hal_rx_desc_sz + l3_pad_bytes + msdu_len);
		skb_pull(msdu, hal_rx_desc_sz + l3_pad_bytes);
	} else {
		ret = ath11k_dp_rx_msdu_coalesce(ar, msdu_list,
						 msdu, last_buf,
						 l3_pad_bytes, msdu_len);
		if (ret) {
			ath11k_warn(ab,
				    "failed to coalesce msdu rx buffer%d\n", ret);
			goto free_out;
		}
	}

	ath11k_dp_rx_h_ppdu(ar, rx_desc, rx_status);
	ath11k_dp_rx_h_mpdu(ar, msdu, rx_desc, rx_status);

	rx_status->flag |= RX_FLAG_SKIP_MONITOR | RX_FLAG_DUP_VALIDATED;

	return 0;

free_out:
	return ret;
}

static void ath11k_dp_rx_process_received_packets(struct ath11k_base *ab,
						  struct napi_struct *napi,
						  struct sk_buff_head *msdu_list,
						  int mac_id)
{
	struct sk_buff *msdu;
	struct ath11k *ar;
	struct ieee80211_rx_status rx_status = {0};
	int ret;

	if (skb_queue_empty(msdu_list))
		return;

	if (unlikely(!rcu_access_pointer(ab->pdevs_active[mac_id]))) {
		__skb_queue_purge(msdu_list);
		return;
	}

	ar = ab->pdevs[mac_id].ar;
	if (unlikely(test_bit(ATH11K_CAC_RUNNING, &ar->dev_flags))) {
		__skb_queue_purge(msdu_list);
		return;
	}

	while ((msdu = __skb_dequeue(msdu_list))) {
		ret = ath11k_dp_rx_process_msdu(ar, msdu, msdu_list, &rx_status);
		if (unlikely(ret)) {
			ath11k_dbg(ab, ATH11K_DBG_DATA,
				   "Unable to process msdu %d", ret);
			dev_kfree_skb_any(msdu);
			continue;
		}

		ath11k_dp_rx_deliver_msdu(ar, napi, msdu, &rx_status);
	}
}

int ath11k_dp_process_rx(struct ath11k_base *ab, int ring_id,
			 struct napi_struct *napi, int budget)
{
	struct ath11k_dp *dp = &ab->dp;
	struct dp_rxdma_ring *rx_ring;
	int num_buffs_reaped[MAX_RADIOS] = {0};
	struct sk_buff_head msdu_list[MAX_RADIOS];
	struct ath11k_skb_rxcb *rxcb;
	int total_msdu_reaped = 0;
	struct hal_srng *srng;
	struct sk_buff *msdu;
	bool done = false;
	int buf_id, mac_id;
	struct ath11k *ar;
	struct hal_reo_dest_ring *desc;
	enum hal_reo_dest_ring_push_reason push_reason;
	u32 cookie;
	int i;

	for (i = 0; i < MAX_RADIOS; i++)
		__skb_queue_head_init(&msdu_list[i]);

	srng = &ab->hal.srng_list[dp->reo_dst_ring[ring_id].ring_id];

	spin_lock_bh(&srng->lock);

try_again:
	ath11k_hal_srng_access_begin(ab, srng);

	while (likely(desc =
	      (struct hal_reo_dest_ring *)ath11k_hal_srng_dst_get_next_entry(ab,
									     srng))) {
		cookie = FIELD_GET(BUFFER_ADDR_INFO1_SW_COOKIE,
				   desc->buf_addr_info.info1);
		buf_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_BUF_ID,
				   cookie);
		mac_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_PDEV_ID, cookie);

		if (unlikely(buf_id == 0))
			continue;

		ar = ab->pdevs[mac_id].ar;
		rx_ring = &ar->dp.rx_refill_buf_ring;
		spin_lock_bh(&rx_ring->idr_lock);
		msdu = idr_find(&rx_ring->bufs_idr, buf_id);
		if (unlikely(!msdu)) {
			ath11k_warn(ab, "frame rx with invalid buf_id %d\n",
				    buf_id);
			spin_unlock_bh(&rx_ring->idr_lock);
			continue;
		}

		idr_remove(&rx_ring->bufs_idr, buf_id);
		spin_unlock_bh(&rx_ring->idr_lock);

		rxcb = ATH11K_SKB_RXCB(msdu);
		dma_unmap_single(ab->dev, rxcb->paddr,
				 msdu->len + skb_tailroom(msdu),
				 DMA_FROM_DEVICE);

		num_buffs_reaped[mac_id]++;

		push_reason = FIELD_GET(HAL_REO_DEST_RING_INFO0_PUSH_REASON,
					desc->info0);
		if (unlikely(push_reason !=
			     HAL_REO_DEST_RING_PUSH_REASON_ROUTING_INSTRUCTION)) {
			dev_kfree_skb_any(msdu);
			ab->soc_stats.hal_reo_error[dp->reo_dst_ring[ring_id].ring_id]++;
			continue;
		}

		rxcb->is_first_msdu = !!(desc->rx_msdu_info.info0 &
					 RX_MSDU_DESC_INFO0_FIRST_MSDU_IN_MPDU);
		rxcb->is_last_msdu = !!(desc->rx_msdu_info.info0 &
					RX_MSDU_DESC_INFO0_LAST_MSDU_IN_MPDU);
		rxcb->is_continuation = !!(desc->rx_msdu_info.info0 &
					   RX_MSDU_DESC_INFO0_MSDU_CONTINUATION);
		rxcb->peer_id = FIELD_GET(RX_MPDU_DESC_META_DATA_PEER_ID,
					  desc->rx_mpdu_info.meta_data);
		rxcb->seq_no = FIELD_GET(RX_MPDU_DESC_INFO0_SEQ_NUM,
					 desc->rx_mpdu_info.info0);
		rxcb->tid = FIELD_GET(HAL_REO_DEST_RING_INFO0_RX_QUEUE_NUM,
				      desc->info0);

		rxcb->mac_id = mac_id;
		__skb_queue_tail(&msdu_list[mac_id], msdu);

		if (rxcb->is_continuation) {
			done = false;
		} else {
			total_msdu_reaped++;
			done = true;
		}

		if (total_msdu_reaped >= budget)
			break;
	}

	/* Hw might have updated the head pointer after we cached it.
	 * In this case, even though there are entries in the ring we'll
	 * get rx_desc NULL. Give the read another try with updated cached
	 * head pointer so that we can reap complete MPDU in the current
	 * rx processing.
	 */
	if (unlikely(!done && ath11k_hal_srng_dst_num_free(ab, srng, true))) {
		ath11k_hal_srng_access_end(ab, srng);
		goto try_again;
	}

	ath11k_hal_srng_access_end(ab, srng);

	spin_unlock_bh(&srng->lock);

	if (unlikely(!total_msdu_reaped))
		goto exit;

	for (i = 0; i < ab->num_radios; i++) {
		if (!num_buffs_reaped[i])
			continue;

		ath11k_dp_rx_process_received_packets(ab, napi, &msdu_list[i], i);

		ar = ab->pdevs[i].ar;
		rx_ring = &ar->dp.rx_refill_buf_ring;

		ath11k_dp_rxbufs_replenish(ab, i, rx_ring, num_buffs_reaped[i],
					   ab->hw_params.hal_params->rx_buf_rbm);
	}
exit:
	return total_msdu_reaped;
}

static void ath11k_dp_rx_update_peer_stats(struct ath11k_sta *arsta,
					   struct hal_rx_mon_ppdu_info *ppdu_info)
{
	struct ath11k_rx_peer_stats *rx_stats = arsta->rx_stats;
	u32 num_msdu;
	int i;

	if (!rx_stats)
		return;

	arsta->rssi_comb = ppdu_info->rssi_comb;
	ewma_avg_rssi_add(&arsta->avg_rssi, ppdu_info->rssi_comb);

	num_msdu = ppdu_info->tcp_msdu_count + ppdu_info->tcp_ack_msdu_count +
		   ppdu_info->udp_msdu_count + ppdu_info->other_msdu_count;

	rx_stats->num_msdu += num_msdu;
	rx_stats->tcp_msdu_count += ppdu_info->tcp_msdu_count +
				    ppdu_info->tcp_ack_msdu_count;
	rx_stats->udp_msdu_count += ppdu_info->udp_msdu_count;
	rx_stats->other_msdu_count += ppdu_info->other_msdu_count;

	if (ppdu_info->preamble_type == HAL_RX_PREAMBLE_11A ||
	    ppdu_info->preamble_type == HAL_RX_PREAMBLE_11B) {
		ppdu_info->nss = 1;
		ppdu_info->mcs = HAL_RX_MAX_MCS;
		ppdu_info->tid = IEEE80211_NUM_TIDS;
	}

	if (ppdu_info->nss > 0 && ppdu_info->nss <= HAL_RX_MAX_NSS)
		rx_stats->nss_count[ppdu_info->nss - 1] += num_msdu;

	if (ppdu_info->mcs <= HAL_RX_MAX_MCS)
		rx_stats->mcs_count[ppdu_info->mcs] += num_msdu;

	if (ppdu_info->gi < HAL_RX_GI_MAX)
		rx_stats->gi_count[ppdu_info->gi] += num_msdu;

	if (ppdu_info->bw < HAL_RX_BW_MAX)
		rx_stats->bw_count[ppdu_info->bw] += num_msdu;

	if (ppdu_info->ldpc < HAL_RX_SU_MU_CODING_MAX)
		rx_stats->coding_count[ppdu_info->ldpc] += num_msdu;

	if (ppdu_info->tid <= IEEE80211_NUM_TIDS)
		rx_stats->tid_count[ppdu_info->tid] += num_msdu;

	if (ppdu_info->preamble_type < HAL_RX_PREAMBLE_MAX)
		rx_stats->pream_cnt[ppdu_info->preamble_type] += num_msdu;

	if (ppdu_info->reception_type < HAL_RX_RECEPTION_TYPE_MAX)
		rx_stats->reception_type[ppdu_info->reception_type] += num_msdu;

	if (ppdu_info->is_stbc)
		rx_stats->stbc_count += num_msdu;

	if (ppdu_info->beamformed)
		rx_stats->beamformed_count += num_msdu;

	if (ppdu_info->num_mpdu_fcs_ok > 1)
		rx_stats->ampdu_msdu_count += num_msdu;
	else
		rx_stats->non_ampdu_msdu_count += num_msdu;

	rx_stats->num_mpdu_fcs_ok += ppdu_info->num_mpdu_fcs_ok;
	rx_stats->num_mpdu_fcs_err += ppdu_info->num_mpdu_fcs_err;
	rx_stats->dcm_count += ppdu_info->dcm;
	rx_stats->ru_alloc_cnt[ppdu_info->ru_alloc] += num_msdu;

	arsta->rssi_comb = ppdu_info->rssi_comb;

	BUILD_BUG_ON(ARRAY_SIZE(arsta->chain_signal) >
			     ARRAY_SIZE(ppdu_info->rssi_chain_pri20));

	for (i = 0; i < ARRAY_SIZE(arsta->chain_signal); i++)
		arsta->chain_signal[i] = ppdu_info->rssi_chain_pri20[i];

	rx_stats->rx_duration += ppdu_info->rx_duration;
	arsta->rx_duration = rx_stats->rx_duration;
}

static struct sk_buff *ath11k_dp_rx_alloc_mon_status_buf(struct ath11k_base *ab,
							 struct dp_rxdma_ring *rx_ring,
							 int *buf_id)
{
	struct sk_buff *skb;
	dma_addr_t paddr;

	skb = dev_alloc_skb(DP_RX_BUFFER_SIZE +
			    DP_RX_BUFFER_ALIGN_SIZE);

	if (!skb)
		goto fail_alloc_skb;

	if (!IS_ALIGNED((unsigned long)skb->data,
			DP_RX_BUFFER_ALIGN_SIZE)) {
		skb_pull(skb, PTR_ALIGN(skb->data, DP_RX_BUFFER_ALIGN_SIZE) -
			 skb->data);
	}

	paddr = dma_map_single(ab->dev, skb->data,
			       skb->len + skb_tailroom(skb),
			       DMA_FROM_DEVICE);
	if (unlikely(dma_mapping_error(ab->dev, paddr)))
		goto fail_free_skb;

	spin_lock_bh(&rx_ring->idr_lock);
	*buf_id = idr_alloc(&rx_ring->bufs_idr, skb, 0,
			    rx_ring->bufs_max, GFP_ATOMIC);
	spin_unlock_bh(&rx_ring->idr_lock);
	if (*buf_id < 0)
		goto fail_dma_unmap;

	ATH11K_SKB_RXCB(skb)->paddr = paddr;
	return skb;

fail_dma_unmap:
	dma_unmap_single(ab->dev, paddr, skb->len + skb_tailroom(skb),
			 DMA_FROM_DEVICE);
fail_free_skb:
	dev_kfree_skb_any(skb);
fail_alloc_skb:
	return NULL;
}

int ath11k_dp_rx_mon_status_bufs_replenish(struct ath11k_base *ab, int mac_id,
					   struct dp_rxdma_ring *rx_ring,
					   int req_entries,
					   enum hal_rx_buf_return_buf_manager mgr)
{
	struct hal_srng *srng;
	u32 *desc;
	struct sk_buff *skb;
	int num_free;
	int num_remain;
	int buf_id;
	u32 cookie;
	dma_addr_t paddr;

	req_entries = min(req_entries, rx_ring->bufs_max);

	srng = &ab->hal.srng_list[rx_ring->refill_buf_ring.ring_id];

	spin_lock_bh(&srng->lock);

	ath11k_hal_srng_access_begin(ab, srng);

	num_free = ath11k_hal_srng_src_num_free(ab, srng, true);

	req_entries = min(num_free, req_entries);
	num_remain = req_entries;

	while (num_remain > 0) {
		skb = ath11k_dp_rx_alloc_mon_status_buf(ab, rx_ring,
							&buf_id);
		if (!skb)
			break;
		paddr = ATH11K_SKB_RXCB(skb)->paddr;

		desc = ath11k_hal_srng_src_get_next_entry(ab, srng);
		if (!desc)
			goto fail_desc_get;

		cookie = FIELD_PREP(DP_RXDMA_BUF_COOKIE_PDEV_ID, mac_id) |
			 FIELD_PREP(DP_RXDMA_BUF_COOKIE_BUF_ID, buf_id);

		num_remain--;

		ath11k_hal_rx_buf_addr_info_set(desc, paddr, cookie, mgr);
	}

	ath11k_hal_srng_access_end(ab, srng);

	spin_unlock_bh(&srng->lock);

	return req_entries - num_remain;

fail_desc_get:
	spin_lock_bh(&rx_ring->idr_lock);
	idr_remove(&rx_ring->bufs_idr, buf_id);
	spin_unlock_bh(&rx_ring->idr_lock);
	dma_unmap_single(ab->dev, paddr, skb->len + skb_tailroom(skb),
			 DMA_FROM_DEVICE);
	dev_kfree_skb_any(skb);
	ath11k_hal_srng_access_end(ab, srng);
	spin_unlock_bh(&srng->lock);

	return req_entries - num_remain;
}

#define ATH11K_DP_RX_FULL_MON_PPDU_ID_WRAP 32535

static void
ath11k_dp_rx_mon_update_status_buf_state(struct ath11k_mon_data *pmon,
					 struct hal_tlv_hdr *tlv)
{
	struct hal_rx_ppdu_start *ppdu_start;
	u16 ppdu_id_diff, ppdu_id, tlv_len;
	u8 *ptr;

	/* PPDU id is part of second tlv, move ptr to second tlv */
	tlv_len = FIELD_GET(HAL_TLV_HDR_LEN, tlv->tl);
	ptr = (u8 *)tlv;
	ptr += sizeof(*tlv) + tlv_len;
	tlv = (struct hal_tlv_hdr *)ptr;

	if (FIELD_GET(HAL_TLV_HDR_TAG, tlv->tl) != HAL_RX_PPDU_START)
		return;

	ptr += sizeof(*tlv);
	ppdu_start = (struct hal_rx_ppdu_start *)ptr;
	ppdu_id = FIELD_GET(HAL_RX_PPDU_START_INFO0_PPDU_ID,
			    __le32_to_cpu(ppdu_start->info0));

	if (pmon->sw_mon_entries.ppdu_id < ppdu_id) {
		pmon->buf_state = DP_MON_STATUS_LEAD;
		ppdu_id_diff = ppdu_id - pmon->sw_mon_entries.ppdu_id;
		if (ppdu_id_diff > ATH11K_DP_RX_FULL_MON_PPDU_ID_WRAP)
			pmon->buf_state = DP_MON_STATUS_LAG;
	} else if (pmon->sw_mon_entries.ppdu_id > ppdu_id) {
		pmon->buf_state = DP_MON_STATUS_LAG;
		ppdu_id_diff = pmon->sw_mon_entries.ppdu_id - ppdu_id;
		if (ppdu_id_diff > ATH11K_DP_RX_FULL_MON_PPDU_ID_WRAP)
			pmon->buf_state = DP_MON_STATUS_LEAD;
	}
}

static int ath11k_dp_rx_reap_mon_status_ring(struct ath11k_base *ab, int mac_id,
					     int *budget, struct sk_buff_head *skb_list)
{
	struct ath11k *ar;
	const struct ath11k_hw_hal_params *hal_params;
	struct ath11k_pdev_dp *dp;
	struct dp_rxdma_ring *rx_ring;
	struct ath11k_mon_data *pmon;
	struct hal_srng *srng;
	void *rx_mon_status_desc;
	struct sk_buff *skb;
	struct ath11k_skb_rxcb *rxcb;
	struct hal_tlv_hdr *tlv;
	u32 cookie;
	int buf_id, srng_id;
	dma_addr_t paddr;
	u8 rbm;
	int num_buffs_reaped = 0;

	ar = ab->pdevs[ath11k_hw_mac_id_to_pdev_id(&ab->hw_params, mac_id)].ar;
	dp = &ar->dp;
	pmon = &dp->mon_data;
	srng_id = ath11k_hw_mac_id_to_srng_id(&ab->hw_params, mac_id);
	rx_ring = &dp->rx_mon_status_refill_ring[srng_id];

	srng = &ab->hal.srng_list[rx_ring->refill_buf_ring.ring_id];

	spin_lock_bh(&srng->lock);

	ath11k_hal_srng_access_begin(ab, srng);
	while (*budget) {
		*budget -= 1;
		rx_mon_status_desc =
			ath11k_hal_srng_src_peek(ab, srng);
		if (!rx_mon_status_desc) {
			pmon->buf_state = DP_MON_STATUS_REPLINISH;
			break;
		}

		ath11k_hal_rx_buf_addr_info_get(rx_mon_status_desc, &paddr,
						&cookie, &rbm);
		if (paddr) {
			buf_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_BUF_ID, cookie);

			spin_lock_bh(&rx_ring->idr_lock);
			skb = idr_find(&rx_ring->bufs_idr, buf_id);
			spin_unlock_bh(&rx_ring->idr_lock);

			if (!skb) {
				ath11k_warn(ab, "rx monitor status with invalid buf_id %d\n",
					    buf_id);
				pmon->buf_state = DP_MON_STATUS_REPLINISH;
				goto move_next;
			}

			rxcb = ATH11K_SKB_RXCB(skb);

			dma_sync_single_for_cpu(ab->dev, rxcb->paddr,
						skb->len + skb_tailroom(skb),
						DMA_FROM_DEVICE);

			tlv = (struct hal_tlv_hdr *)skb->data;
			if (FIELD_GET(HAL_TLV_HDR_TAG, tlv->tl) !=
					HAL_RX_STATUS_BUFFER_DONE) {
				ath11k_warn(ab, "mon status DONE not set %lx, buf_id %d\n",
					    FIELD_GET(HAL_TLV_HDR_TAG,
						      tlv->tl), buf_id);
				/* If done status is missing, hold onto status
				 * ring until status is done for this status
				 * ring buffer.
				 * Keep HP in mon_status_ring unchanged,
				 * and break from here.
				 * Check status for same buffer for next time
				 */
				pmon->buf_state = DP_MON_STATUS_NO_DMA;
				break;
			}

			spin_lock_bh(&rx_ring->idr_lock);
			idr_remove(&rx_ring->bufs_idr, buf_id);
			spin_unlock_bh(&rx_ring->idr_lock);
			if (ab->hw_params.full_monitor_mode) {
				ath11k_dp_rx_mon_update_status_buf_state(pmon, tlv);
				if (paddr == pmon->mon_status_paddr)
					pmon->buf_state = DP_MON_STATUS_MATCH;
			}

			dma_unmap_single(ab->dev, rxcb->paddr,
					 skb->len + skb_tailroom(skb),
					 DMA_FROM_DEVICE);

			__skb_queue_tail(skb_list, skb);
		} else {
			pmon->buf_state = DP_MON_STATUS_REPLINISH;
		}
move_next:
		skb = ath11k_dp_rx_alloc_mon_status_buf(ab, rx_ring,
							&buf_id);

		if (!skb) {
			hal_params = ab->hw_params.hal_params;
			ath11k_hal_rx_buf_addr_info_set(rx_mon_status_desc, 0, 0,
							hal_params->rx_buf_rbm);
			num_buffs_reaped++;
			break;
		}
		rxcb = ATH11K_SKB_RXCB(skb);

		cookie = FIELD_PREP(DP_RXDMA_BUF_COOKIE_PDEV_ID, mac_id) |
			 FIELD_PREP(DP_RXDMA_BUF_COOKIE_BUF_ID, buf_id);

		ath11k_hal_rx_buf_addr_info_set(rx_mon_status_desc, rxcb->paddr,
						cookie,
						ab->hw_params.hal_params->rx_buf_rbm);
		ath11k_hal_srng_src_get_next_entry(ab, srng);
		num_buffs_reaped++;
	}
	ath11k_hal_srng_access_end(ab, srng);
	spin_unlock_bh(&srng->lock);

	return num_buffs_reaped;
}

static void ath11k_dp_rx_frag_timer(struct timer_list *timer)
{
	struct dp_rx_tid *rx_tid = from_timer(rx_tid, timer, frag_timer);

	spin_lock_bh(&rx_tid->ab->base_lock);
	if (rx_tid->last_frag_no &&
	    rx_tid->rx_frag_bitmap == GENMASK(rx_tid->last_frag_no, 0)) {
		spin_unlock_bh(&rx_tid->ab->base_lock);
		return;
	}
	ath11k_dp_rx_frags_cleanup(rx_tid, true);
	spin_unlock_bh(&rx_tid->ab->base_lock);
}

int ath11k_peer_rx_frag_setup(struct ath11k *ar, const u8 *peer_mac, int vdev_id)
{
	struct ath11k_base *ab = ar->ab;
	struct crypto_shash *tfm;
	struct ath11k_peer *peer;
	struct dp_rx_tid *rx_tid;
	int i;

	tfm = crypto_alloc_shash("michael_mic", 0, 0);
	if (IS_ERR(tfm)) {
		ath11k_warn(ab, "failed to allocate michael_mic shash: %ld\n",
			    PTR_ERR(tfm));
		return PTR_ERR(tfm);
	}

	spin_lock_bh(&ab->base_lock);

	peer = ath11k_peer_find(ab, vdev_id, peer_mac);
	if (!peer) {
		ath11k_warn(ab, "failed to find the peer to set up fragment info\n");
		spin_unlock_bh(&ab->base_lock);
		crypto_free_shash(tfm);
		return -ENOENT;
	}

	for (i = 0; i <= IEEE80211_NUM_TIDS; i++) {
		rx_tid = &peer->rx_tid[i];
		rx_tid->ab = ab;
		timer_setup(&rx_tid->frag_timer, ath11k_dp_rx_frag_timer, 0);
		skb_queue_head_init(&rx_tid->rx_frags);
	}

	peer->tfm_mmic = tfm;
	peer->dp_setup_done = true;
	spin_unlock_bh(&ab->base_lock);

	return 0;
}

static int ath11k_dp_rx_h_michael_mic(struct crypto_shash *tfm, u8 *key,
				      struct ieee80211_hdr *hdr, u8 *data,
				      size_t data_len, u8 *mic)
{
	SHASH_DESC_ON_STACK(desc, tfm);
	u8 mic_hdr[16] = {0};
	u8 tid = 0;
	int ret;

	if (!tfm)
		return -EINVAL;

	desc->tfm = tfm;

	ret = crypto_shash_setkey(tfm, key, 8);
	if (ret)
		goto out;

	ret = crypto_shash_init(desc);
	if (ret)
		goto out;

	/* TKIP MIC header */
	memcpy(mic_hdr, ieee80211_get_DA(hdr), ETH_ALEN);
	memcpy(mic_hdr + ETH_ALEN, ieee80211_get_SA(hdr), ETH_ALEN);
	if (ieee80211_is_data_qos(hdr->frame_control))
		tid = ieee80211_get_tid(hdr);
	mic_hdr[12] = tid;

	ret = crypto_shash_update(desc, mic_hdr, 16);
	if (ret)
		goto out;
	ret = crypto_shash_update(desc, data, data_len);
	if (ret)
		goto out;
	ret = crypto_shash_final(desc, mic);
out:
	shash_desc_zero(desc);
	return ret;
}

static int ath11k_dp_rx_h_verify_tkip_mic(struct ath11k *ar, struct ath11k_peer *peer,
					  struct sk_buff *msdu)
{
	struct hal_rx_desc *rx_desc = (struct hal_rx_desc *)msdu->data;
	struct ieee80211_rx_status *rxs = IEEE80211_SKB_RXCB(msdu);
	struct ieee80211_key_conf *key_conf;
	struct ieee80211_hdr *hdr;
	u8 mic[IEEE80211_CCMP_MIC_LEN];
	int head_len, tail_len, ret;
	size_t data_len;
	u32 hdr_len, hal_rx_desc_sz = ar->ab->hw_params.hal_desc_sz;
	u8 *key, *data;
	u8 key_idx;

	if (ath11k_dp_rx_h_mpdu_start_enctype(ar->ab, rx_desc) !=
	    HAL_ENCRYPT_TYPE_TKIP_MIC)
		return 0;

	hdr = (struct ieee80211_hdr *)(msdu->data + hal_rx_desc_sz);
	hdr_len = ieee80211_hdrlen(hdr->frame_control);
	head_len = hdr_len + hal_rx_desc_sz + IEEE80211_TKIP_IV_LEN;
	tail_len = IEEE80211_CCMP_MIC_LEN + IEEE80211_TKIP_ICV_LEN + FCS_LEN;

	if (!is_multicast_ether_addr(hdr->addr1))
		key_idx = peer->ucast_keyidx;
	else
		key_idx = peer->mcast_keyidx;

	key_conf = peer->keys[key_idx];

	data = msdu->data + head_len;
	data_len = msdu->len - head_len - tail_len;
	key = &key_conf->key[NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY];

	ret = ath11k_dp_rx_h_michael_mic(peer->tfm_mmic, key, hdr, data, data_len, mic);
	if (ret || memcmp(mic, data + data_len, IEEE80211_CCMP_MIC_LEN))
		goto mic_fail;

	return 0;

mic_fail:
	(ATH11K_SKB_RXCB(msdu))->is_first_msdu = true;
	(ATH11K_SKB_RXCB(msdu))->is_last_msdu = true;

	rxs->flag |= RX_FLAG_MMIC_ERROR | RX_FLAG_MMIC_STRIPPED |
		    RX_FLAG_IV_STRIPPED | RX_FLAG_DECRYPTED;
	skb_pull(msdu, hal_rx_desc_sz);

	ath11k_dp_rx_h_ppdu(ar, rx_desc, rxs);
	ath11k_dp_rx_h_undecap(ar, msdu, rx_desc,
			       HAL_ENCRYPT_TYPE_TKIP_MIC, rxs, true);
	ieee80211_rx(ar->hw, msdu);
	return -EINVAL;
}

static void ath11k_dp_rx_h_undecap_frag(struct ath11k *ar, struct sk_buff *msdu,
					enum hal_encrypt_type enctype, u32 flags)
{
	struct ieee80211_hdr *hdr;
	size_t hdr_len;
	size_t crypto_len;
	u32 hal_rx_desc_sz = ar->ab->hw_params.hal_desc_sz;

	if (!flags)
		return;

	hdr = (struct ieee80211_hdr *)(msdu->data + hal_rx_desc_sz);

	if (flags & RX_FLAG_MIC_STRIPPED)
		skb_trim(msdu, msdu->len -
			 ath11k_dp_rx_crypto_mic_len(ar, enctype));

	if (flags & RX_FLAG_ICV_STRIPPED)
		skb_trim(msdu, msdu->len -
			 ath11k_dp_rx_crypto_icv_len(ar, enctype));

	if (flags & RX_FLAG_IV_STRIPPED) {
		hdr_len = ieee80211_hdrlen(hdr->frame_control);
		crypto_len = ath11k_dp_rx_crypto_param_len(ar, enctype);

		memmove((void *)msdu->data + hal_rx_desc_sz + crypto_len,
			(void *)msdu->data + hal_rx_desc_sz, hdr_len);
		skb_pull(msdu, crypto_len);
	}
}

static int ath11k_dp_rx_h_defrag(struct ath11k *ar,
				 struct ath11k_peer *peer,
				 struct dp_rx_tid *rx_tid,
				 struct sk_buff **defrag_skb)
{
	struct hal_rx_desc *rx_desc;
	struct sk_buff *skb, *first_frag, *last_frag;
	struct ieee80211_hdr *hdr;
	struct rx_attention *rx_attention;
	enum hal_encrypt_type enctype;
	bool is_decrypted = false;
	int msdu_len = 0;
	int extra_space;
	u32 flags, hal_rx_desc_sz = ar->ab->hw_params.hal_desc_sz;

	first_frag = skb_peek(&rx_tid->rx_frags);
	last_frag = skb_peek_tail(&rx_tid->rx_frags);

	skb_queue_walk(&rx_tid->rx_frags, skb) {
		flags = 0;
		rx_desc = (struct hal_rx_desc *)skb->data;
		hdr = (struct ieee80211_hdr *)(skb->data + hal_rx_desc_sz);

		enctype = ath11k_dp_rx_h_mpdu_start_enctype(ar->ab, rx_desc);
		if (enctype != HAL_ENCRYPT_TYPE_OPEN) {
			rx_attention = ath11k_dp_rx_get_attention(ar->ab, rx_desc);
			is_decrypted = ath11k_dp_rx_h_attn_is_decrypted(rx_attention);
		}

		if (is_decrypted) {
			if (skb != first_frag)
				flags |=  RX_FLAG_IV_STRIPPED;
			if (skb != last_frag)
				flags |= RX_FLAG_ICV_STRIPPED |
					 RX_FLAG_MIC_STRIPPED;
		}

		/* RX fragments are always raw packets */
		if (skb != last_frag)
			skb_trim(skb, skb->len - FCS_LEN);
		ath11k_dp_rx_h_undecap_frag(ar, skb, enctype, flags);

		if (skb != first_frag)
			skb_pull(skb, hal_rx_desc_sz +
				      ieee80211_hdrlen(hdr->frame_control));
		msdu_len += skb->len;
	}

	extra_space = msdu_len - (DP_RX_BUFFER_SIZE + skb_tailroom(first_frag));
	if (extra_space > 0 &&
	    (pskb_expand_head(first_frag, 0, extra_space, GFP_ATOMIC) < 0))
		return -ENOMEM;

	__skb_unlink(first_frag, &rx_tid->rx_frags);
	while ((skb = __skb_dequeue(&rx_tid->rx_frags))) {
		skb_put_data(first_frag, skb->data, skb->len);
		dev_kfree_skb_any(skb);
	}

	hdr = (struct ieee80211_hdr *)(first_frag->data + hal_rx_desc_sz);
	hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_MOREFRAGS);
	ATH11K_SKB_RXCB(first_frag)->is_frag = 1;

	if (ath11k_dp_rx_h_verify_tkip_mic(ar, peer, first_frag))
		first_frag = NULL;

	*defrag_skb = first_frag;
	return 0;
}

static int ath11k_dp_rx_h_defrag_reo_reinject(struct ath11k *ar, struct dp_rx_tid *rx_tid,
					      struct sk_buff *defrag_skb)
{
	struct ath11k_base *ab = ar->ab;
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct dp_rxdma_ring *rx_refill_ring = &dp->rx_refill_buf_ring;
	struct hal_rx_desc *rx_desc = (struct hal_rx_desc *)defrag_skb->data;
	struct hal_reo_entrance_ring *reo_ent_ring;
	struct hal_reo_dest_ring *reo_dest_ring;
	struct dp_link_desc_bank *link_desc_banks;
	struct hal_rx_msdu_link *msdu_link;
	struct hal_rx_msdu_details *msdu0;
	struct hal_srng *srng;
	dma_addr_t paddr;
	u32 desc_bank, msdu_info, mpdu_info;
	u32 dst_idx, cookie, hal_rx_desc_sz;
	int ret, buf_id;

	hal_rx_desc_sz = ab->hw_params.hal_desc_sz;
	link_desc_banks = ab->dp.link_desc_banks;
	reo_dest_ring = rx_tid->dst_ring_desc;

	ath11k_hal_rx_reo_ent_paddr_get(ab, reo_dest_ring, &paddr, &desc_bank);
	msdu_link = (struct hal_rx_msdu_link *)(link_desc_banks[desc_bank].vaddr +
			(paddr - link_desc_banks[desc_bank].paddr));
	msdu0 = &msdu_link->msdu_link[0];
	dst_idx = FIELD_GET(RX_MSDU_DESC_INFO0_REO_DEST_IND, msdu0->rx_msdu_info.info0);
	memset(msdu0, 0, sizeof(*msdu0));

	msdu_info = FIELD_PREP(RX_MSDU_DESC_INFO0_FIRST_MSDU_IN_MPDU, 1) |
		    FIELD_PREP(RX_MSDU_DESC_INFO0_LAST_MSDU_IN_MPDU, 1) |
		    FIELD_PREP(RX_MSDU_DESC_INFO0_MSDU_CONTINUATION, 0) |
		    FIELD_PREP(RX_MSDU_DESC_INFO0_MSDU_LENGTH,
			       defrag_skb->len - hal_rx_desc_sz) |
		    FIELD_PREP(RX_MSDU_DESC_INFO0_REO_DEST_IND, dst_idx) |
		    FIELD_PREP(RX_MSDU_DESC_INFO0_VALID_SA, 1) |
		    FIELD_PREP(RX_MSDU_DESC_INFO0_VALID_DA, 1);
	msdu0->rx_msdu_info.info0 = msdu_info;

	/* change msdu len in hal rx desc */
	ath11k_dp_rxdesc_set_msdu_len(ab, rx_desc, defrag_skb->len - hal_rx_desc_sz);

	paddr = dma_map_single(ab->dev, defrag_skb->data,
			       defrag_skb->len + skb_tailroom(defrag_skb),
			       DMA_TO_DEVICE);
	if (dma_mapping_error(ab->dev, paddr))
		return -ENOMEM;

	spin_lock_bh(&rx_refill_ring->idr_lock);
	buf_id = idr_alloc(&rx_refill_ring->bufs_idr, defrag_skb, 0,
			   rx_refill_ring->bufs_max * 3, GFP_ATOMIC);
	spin_unlock_bh(&rx_refill_ring->idr_lock);
	if (buf_id < 0) {
		ret = -ENOMEM;
		goto err_unmap_dma;
	}

	ATH11K_SKB_RXCB(defrag_skb)->paddr = paddr;
	cookie = FIELD_PREP(DP_RXDMA_BUF_COOKIE_PDEV_ID, dp->mac_id) |
		 FIELD_PREP(DP_RXDMA_BUF_COOKIE_BUF_ID, buf_id);

	ath11k_hal_rx_buf_addr_info_set(msdu0, paddr, cookie,
					ab->hw_params.hal_params->rx_buf_rbm);

	/* Fill mpdu details into reo entrance ring */
	srng = &ab->hal.srng_list[ab->dp.reo_reinject_ring.ring_id];

	spin_lock_bh(&srng->lock);
	ath11k_hal_srng_access_begin(ab, srng);

	reo_ent_ring = (struct hal_reo_entrance_ring *)
			ath11k_hal_srng_src_get_next_entry(ab, srng);
	if (!reo_ent_ring) {
		ath11k_hal_srng_access_end(ab, srng);
		spin_unlock_bh(&srng->lock);
		ret = -ENOSPC;
		goto err_free_idr;
	}
	memset(reo_ent_ring, 0, sizeof(*reo_ent_ring));

	ath11k_hal_rx_reo_ent_paddr_get(ab, reo_dest_ring, &paddr, &desc_bank);
	ath11k_hal_rx_buf_addr_info_set(reo_ent_ring, paddr, desc_bank,
					HAL_RX_BUF_RBM_WBM_IDLE_DESC_LIST);

	mpdu_info = FIELD_PREP(RX_MPDU_DESC_INFO0_MSDU_COUNT, 1) |
		    FIELD_PREP(RX_MPDU_DESC_INFO0_SEQ_NUM, rx_tid->cur_sn) |
		    FIELD_PREP(RX_MPDU_DESC_INFO0_FRAG_FLAG, 0) |
		    FIELD_PREP(RX_MPDU_DESC_INFO0_VALID_SA, 1) |
		    FIELD_PREP(RX_MPDU_DESC_INFO0_VALID_DA, 1) |
		    FIELD_PREP(RX_MPDU_DESC_INFO0_RAW_MPDU, 1) |
		    FIELD_PREP(RX_MPDU_DESC_INFO0_VALID_PN, 1);

	reo_ent_ring->rx_mpdu_info.info0 = mpdu_info;
	reo_ent_ring->rx_mpdu_info.meta_data = reo_dest_ring->rx_mpdu_info.meta_data;
	reo_ent_ring->queue_addr_lo = reo_dest_ring->queue_addr_lo;
	reo_ent_ring->info0 = FIELD_PREP(HAL_REO_ENTR_RING_INFO0_QUEUE_ADDR_HI,
					 FIELD_GET(HAL_REO_DEST_RING_INFO0_QUEUE_ADDR_HI,
						   reo_dest_ring->info0)) |
			      FIELD_PREP(HAL_REO_ENTR_RING_INFO0_DEST_IND, dst_idx);
	ath11k_hal_srng_access_end(ab, srng);
	spin_unlock_bh(&srng->lock);

	return 0;

err_free_idr:
	spin_lock_bh(&rx_refill_ring->idr_lock);
	idr_remove(&rx_refill_ring->bufs_idr, buf_id);
	spin_unlock_bh(&rx_refill_ring->idr_lock);
err_unmap_dma:
	dma_unmap_single(ab->dev, paddr, defrag_skb->len + skb_tailroom(defrag_skb),
			 DMA_TO_DEVICE);
	return ret;
}

static int ath11k_dp_rx_h_cmp_frags(struct ath11k *ar,
				    struct sk_buff *a, struct sk_buff *b)
{
	int frag1, frag2;

	frag1 = ath11k_dp_rx_h_mpdu_start_frag_no(ar->ab, a);
	frag2 = ath11k_dp_rx_h_mpdu_start_frag_no(ar->ab, b);

	return frag1 - frag2;
}

static void ath11k_dp_rx_h_sort_frags(struct ath11k *ar,
				      struct sk_buff_head *frag_list,
				      struct sk_buff *cur_frag)
{
	struct sk_buff *skb;
	int cmp;

	skb_queue_walk(frag_list, skb) {
		cmp = ath11k_dp_rx_h_cmp_frags(ar, skb, cur_frag);
		if (cmp < 0)
			continue;
		__skb_queue_before(frag_list, skb, cur_frag);
		return;
	}
	__skb_queue_tail(frag_list, cur_frag);
}

static u64 ath11k_dp_rx_h_get_pn(struct ath11k *ar, struct sk_buff *skb)
{
	struct ieee80211_hdr *hdr;
	u64 pn = 0;
	u8 *ehdr;
	u32 hal_rx_desc_sz = ar->ab->hw_params.hal_desc_sz;

	hdr = (struct ieee80211_hdr *)(skb->data + hal_rx_desc_sz);
	ehdr = skb->data + hal_rx_desc_sz + ieee80211_hdrlen(hdr->frame_control);

	pn = ehdr[0];
	pn |= (u64)ehdr[1] << 8;
	pn |= (u64)ehdr[4] << 16;
	pn |= (u64)ehdr[5] << 24;
	pn |= (u64)ehdr[6] << 32;
	pn |= (u64)ehdr[7] << 40;

	return pn;
}

static bool
ath11k_dp_rx_h_defrag_validate_incr_pn(struct ath11k *ar, struct dp_rx_tid *rx_tid)
{
	enum hal_encrypt_type encrypt_type;
	struct sk_buff *first_frag, *skb;
	struct hal_rx_desc *desc;
	u64 last_pn;
	u64 cur_pn;

	first_frag = skb_peek(&rx_tid->rx_frags);
	desc = (struct hal_rx_desc *)first_frag->data;

	encrypt_type = ath11k_dp_rx_h_mpdu_start_enctype(ar->ab, desc);
	if (encrypt_type != HAL_ENCRYPT_TYPE_CCMP_128 &&
	    encrypt_type != HAL_ENCRYPT_TYPE_CCMP_256 &&
	    encrypt_type != HAL_ENCRYPT_TYPE_GCMP_128 &&
	    encrypt_type != HAL_ENCRYPT_TYPE_AES_GCMP_256)
		return true;

	last_pn = ath11k_dp_rx_h_get_pn(ar, first_frag);
	skb_queue_walk(&rx_tid->rx_frags, skb) {
		if (skb == first_frag)
			continue;

		cur_pn = ath11k_dp_rx_h_get_pn(ar, skb);
		if (cur_pn != last_pn + 1)
			return false;
		last_pn = cur_pn;
	}
	return true;
}

static int ath11k_dp_rx_frag_h_mpdu(struct ath11k *ar,
				    struct sk_buff *msdu,
				    u32 *ring_desc)
{
	struct ath11k_base *ab = ar->ab;
	struct hal_rx_desc *rx_desc;
	struct ath11k_peer *peer;
	struct dp_rx_tid *rx_tid;
	struct sk_buff *defrag_skb = NULL;
	u32 peer_id;
	u16 seqno, frag_no;
	u8 tid;
	int ret = 0;
	bool more_frags;
	bool is_mcbc;

	rx_desc = (struct hal_rx_desc *)msdu->data;
	peer_id = ath11k_dp_rx_h_mpdu_start_peer_id(ar->ab, rx_desc);
	tid = ath11k_dp_rx_h_mpdu_start_tid(ar->ab, rx_desc);
	seqno = ath11k_dp_rx_h_mpdu_start_seq_no(ar->ab, rx_desc);
	frag_no = ath11k_dp_rx_h_mpdu_start_frag_no(ar->ab, msdu);
	more_frags = ath11k_dp_rx_h_mpdu_start_more_frags(ar->ab, msdu);
	is_mcbc = ath11k_dp_rx_h_attn_is_mcbc(ar->ab, rx_desc);

	/* Multicast/Broadcast fragments are not expected */
	if (is_mcbc)
		return -EINVAL;

	if (!ath11k_dp_rx_h_mpdu_start_seq_ctrl_valid(ar->ab, rx_desc) ||
	    !ath11k_dp_rx_h_mpdu_start_fc_valid(ar->ab, rx_desc) ||
	    tid > IEEE80211_NUM_TIDS)
		return -EINVAL;

	/* received unfragmented packet in reo
	 * exception ring, this shouldn't happen
	 * as these packets typically come from
	 * reo2sw srngs.
	 */
	if (WARN_ON_ONCE(!frag_no && !more_frags))
		return -EINVAL;

	spin_lock_bh(&ab->base_lock);
	peer = ath11k_peer_find_by_id(ab, peer_id);
	if (!peer) {
		ath11k_warn(ab, "failed to find the peer to de-fragment received fragment peer_id %d\n",
			    peer_id);
		ret = -ENOENT;
		goto out_unlock;
	}
	if (!peer->dp_setup_done) {
		ath11k_warn(ab, "The peer %pM [%d] has uninitialized datapath\n",
			    peer->addr, peer_id);
		ret = -ENOENT;
		goto out_unlock;
	}

	rx_tid = &peer->rx_tid[tid];

	if ((!skb_queue_empty(&rx_tid->rx_frags) && seqno != rx_tid->cur_sn) ||
	    skb_queue_empty(&rx_tid->rx_frags)) {
		/* Flush stored fragments and start a new sequence */
		ath11k_dp_rx_frags_cleanup(rx_tid, true);
		rx_tid->cur_sn = seqno;
	}

	if (rx_tid->rx_frag_bitmap & BIT(frag_no)) {
		/* Fragment already present */
		ret = -EINVAL;
		goto out_unlock;
	}

	if (!rx_tid->rx_frag_bitmap || (frag_no > __fls(rx_tid->rx_frag_bitmap)))
		__skb_queue_tail(&rx_tid->rx_frags, msdu);
	else
		ath11k_dp_rx_h_sort_frags(ar, &rx_tid->rx_frags, msdu);

	rx_tid->rx_frag_bitmap |= BIT(frag_no);
	if (!more_frags)
		rx_tid->last_frag_no = frag_no;

	if (frag_no == 0) {
		rx_tid->dst_ring_desc = kmemdup(ring_desc,
						sizeof(*rx_tid->dst_ring_desc),
						GFP_ATOMIC);
		if (!rx_tid->dst_ring_desc) {
			ret = -ENOMEM;
			goto out_unlock;
		}
	} else {
		ath11k_dp_rx_link_desc_return(ab, ring_desc,
					      HAL_WBM_REL_BM_ACT_PUT_IN_IDLE);
	}

	if (!rx_tid->last_frag_no ||
	    rx_tid->rx_frag_bitmap != GENMASK(rx_tid->last_frag_no, 0)) {
		mod_timer(&rx_tid->frag_timer, jiffies +
					       ATH11K_DP_RX_FRAGMENT_TIMEOUT_MS);
		goto out_unlock;
	}

	spin_unlock_bh(&ab->base_lock);
	del_timer_sync(&rx_tid->frag_timer);
	spin_lock_bh(&ab->base_lock);

	peer = ath11k_peer_find_by_id(ab, peer_id);
	if (!peer)
		goto err_frags_cleanup;

	if (!ath11k_dp_rx_h_defrag_validate_incr_pn(ar, rx_tid))
		goto err_frags_cleanup;

	if (ath11k_dp_rx_h_defrag(ar, peer, rx_tid, &defrag_skb))
		goto err_frags_cleanup;

	if (!defrag_skb)
		goto err_frags_cleanup;

	if (ath11k_dp_rx_h_defrag_reo_reinject(ar, rx_tid, defrag_skb))
		goto err_frags_cleanup;

	ath11k_dp_rx_frags_cleanup(rx_tid, false);
	goto out_unlock;

err_frags_cleanup:
	dev_kfree_skb_any(defrag_skb);
	ath11k_dp_rx_frags_cleanup(rx_tid, true);
out_unlock:
	spin_unlock_bh(&ab->base_lock);
	return ret;
}

static int
ath11k_dp_process_rx_err_buf(struct ath11k *ar, u32 *ring_desc, int buf_id, bool drop)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct dp_rxdma_ring *rx_ring = &dp->rx_refill_buf_ring;
	struct sk_buff *msdu;
	struct ath11k_skb_rxcb *rxcb;
	struct hal_rx_desc *rx_desc;
	u8 *hdr_status;
	u16 msdu_len;
	u32 hal_rx_desc_sz = ar->ab->hw_params.hal_desc_sz;

	spin_lock_bh(&rx_ring->idr_lock);
	msdu = idr_find(&rx_ring->bufs_idr, buf_id);
	if (!msdu) {
		ath11k_warn(ar->ab, "rx err buf with invalid buf_id %d\n",
			    buf_id);
		spin_unlock_bh(&rx_ring->idr_lock);
		return -EINVAL;
	}

	idr_remove(&rx_ring->bufs_idr, buf_id);
	spin_unlock_bh(&rx_ring->idr_lock);

	rxcb = ATH11K_SKB_RXCB(msdu);
	dma_unmap_single(ar->ab->dev, rxcb->paddr,
			 msdu->len + skb_tailroom(msdu),
			 DMA_FROM_DEVICE);

	if (drop) {
		dev_kfree_skb_any(msdu);
		return 0;
	}

	rcu_read_lock();
	if (!rcu_dereference(ar->ab->pdevs_active[ar->pdev_idx])) {
		dev_kfree_skb_any(msdu);
		goto exit;
	}

	if (test_bit(ATH11K_CAC_RUNNING, &ar->dev_flags)) {
		dev_kfree_skb_any(msdu);
		goto exit;
	}

	rx_desc = (struct hal_rx_desc *)msdu->data;
	msdu_len = ath11k_dp_rx_h_msdu_start_msdu_len(ar->ab, rx_desc);
	if ((msdu_len + hal_rx_desc_sz) > DP_RX_BUFFER_SIZE) {
		hdr_status = ath11k_dp_rx_h_80211_hdr(ar->ab, rx_desc);
		ath11k_warn(ar->ab, "invalid msdu leng %u", msdu_len);
		ath11k_dbg_dump(ar->ab, ATH11K_DBG_DATA, NULL, "", hdr_status,
				sizeof(struct ieee80211_hdr));
		ath11k_dbg_dump(ar->ab, ATH11K_DBG_DATA, NULL, "", rx_desc,
				sizeof(struct hal_rx_desc));
		dev_kfree_skb_any(msdu);
		goto exit;
	}

	skb_put(msdu, hal_rx_desc_sz + msdu_len);

	if (ath11k_dp_rx_frag_h_mpdu(ar, msdu, ring_desc)) {
		dev_kfree_skb_any(msdu);
		ath11k_dp_rx_link_desc_return(ar->ab, ring_desc,
					      HAL_WBM_REL_BM_ACT_PUT_IN_IDLE);
	}
exit:
	rcu_read_unlock();
	return 0;
}

int ath11k_dp_process_rx_err(struct ath11k_base *ab, struct napi_struct *napi,
			     int budget)
{
	u32 msdu_cookies[HAL_NUM_RX_MSDUS_PER_LINK_DESC];
	struct dp_link_desc_bank *link_desc_banks;
	enum hal_rx_buf_return_buf_manager rbm;
	int tot_n_bufs_reaped, quota, ret, i;
	int n_bufs_reaped[MAX_RADIOS] = {0};
	struct dp_rxdma_ring *rx_ring;
	struct dp_srng *reo_except;
	u32 desc_bank, num_msdus;
	struct hal_srng *srng;
	struct ath11k_dp *dp;
	void *link_desc_va;
	int buf_id, mac_id;
	struct ath11k *ar;
	dma_addr_t paddr;
	u32 *desc;
	bool is_frag;
	u8 drop = 0;

	tot_n_bufs_reaped = 0;
	quota = budget;

	dp = &ab->dp;
	reo_except = &dp->reo_except_ring;
	link_desc_banks = dp->link_desc_banks;

	srng = &ab->hal.srng_list[reo_except->ring_id];

	spin_lock_bh(&srng->lock);

	ath11k_hal_srng_access_begin(ab, srng);

	while (budget &&
	       (desc = ath11k_hal_srng_dst_get_next_entry(ab, srng))) {
		struct hal_reo_dest_ring *reo_desc = (struct hal_reo_dest_ring *)desc;

		ab->soc_stats.err_ring_pkts++;
		ret = ath11k_hal_desc_reo_parse_err(ab, desc, &paddr,
						    &desc_bank);
		if (ret) {
			ath11k_warn(ab, "failed to parse error reo desc %d\n",
				    ret);
			continue;
		}
		link_desc_va = link_desc_banks[desc_bank].vaddr +
			       (paddr - link_desc_banks[desc_bank].paddr);
		ath11k_hal_rx_msdu_link_info_get(link_desc_va, &num_msdus, msdu_cookies,
						 &rbm);
		if (rbm != HAL_RX_BUF_RBM_WBM_IDLE_DESC_LIST &&
		    rbm != HAL_RX_BUF_RBM_SW3_BM) {
			ab->soc_stats.invalid_rbm++;
			ath11k_warn(ab, "invalid return buffer manager %d\n", rbm);
			ath11k_dp_rx_link_desc_return(ab, desc,
						      HAL_WBM_REL_BM_ACT_REL_MSDU);
			continue;
		}

		is_frag = !!(reo_desc->rx_mpdu_info.info0 & RX_MPDU_DESC_INFO0_FRAG_FLAG);

		/* Process only rx fragments with one msdu per link desc below, and drop
		 * msdu's indicated due to error reasons.
		 */
		if (!is_frag || num_msdus > 1) {
			drop = 1;
			/* Return the link desc back to wbm idle list */
			ath11k_dp_rx_link_desc_return(ab, desc,
						      HAL_WBM_REL_BM_ACT_PUT_IN_IDLE);
		}

		for (i = 0; i < num_msdus; i++) {
			buf_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_BUF_ID,
					   msdu_cookies[i]);

			mac_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_PDEV_ID,
					   msdu_cookies[i]);

			ar = ab->pdevs[mac_id].ar;

			if (!ath11k_dp_process_rx_err_buf(ar, desc, buf_id, drop)) {
				n_bufs_reaped[mac_id]++;
				tot_n_bufs_reaped++;
			}
		}

		if (tot_n_bufs_reaped >= quota) {
			tot_n_bufs_reaped = quota;
			goto exit;
		}

		budget = quota - tot_n_bufs_reaped;
	}

exit:
	ath11k_hal_srng_access_end(ab, srng);

	spin_unlock_bh(&srng->lock);

	for (i = 0; i <  ab->num_radios; i++) {
		if (!n_bufs_reaped[i])
			continue;

		ar = ab->pdevs[i].ar;
		rx_ring = &ar->dp.rx_refill_buf_ring;

		ath11k_dp_rxbufs_replenish(ab, i, rx_ring, n_bufs_reaped[i],
					   ab->hw_params.hal_params->rx_buf_rbm);
	}

	return tot_n_bufs_reaped;
}

static void ath11k_dp_rx_null_q_desc_sg_drop(struct ath11k *ar,
					     int msdu_len,
					     struct sk_buff_head *msdu_list)
{
	struct sk_buff *skb, *tmp;
	struct ath11k_skb_rxcb *rxcb;
	int n_buffs;

	n_buffs = DIV_ROUND_UP(msdu_len,
			       (DP_RX_BUFFER_SIZE - ar->ab->hw_params.hal_desc_sz));

	skb_queue_walk_safe(msdu_list, skb, tmp) {
		rxcb = ATH11K_SKB_RXCB(skb);
		if (rxcb->err_rel_src == HAL_WBM_REL_SRC_MODULE_REO &&
		    rxcb->err_code == HAL_REO_DEST_RING_ERROR_CODE_DESC_ADDR_ZERO) {
			if (!n_buffs)
				break;
			__skb_unlink(skb, msdu_list);
			dev_kfree_skb_any(skb);
			n_buffs--;
		}
	}
}

static int ath11k_dp_rx_h_null_q_desc(struct ath11k *ar, struct sk_buff *msdu,
				      struct ieee80211_rx_status *status,
				      struct sk_buff_head *msdu_list)
{
	u16 msdu_len;
	struct hal_rx_desc *desc = (struct hal_rx_desc *)msdu->data;
	struct rx_attention *rx_attention;
	u8 l3pad_bytes;
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(msdu);
	u32 hal_rx_desc_sz = ar->ab->hw_params.hal_desc_sz;

	msdu_len = ath11k_dp_rx_h_msdu_start_msdu_len(ar->ab, desc);

	if (!rxcb->is_frag && ((msdu_len + hal_rx_desc_sz) > DP_RX_BUFFER_SIZE)) {
		/* First buffer will be freed by the caller, so deduct it's length */
		msdu_len = msdu_len - (DP_RX_BUFFER_SIZE - hal_rx_desc_sz);
		ath11k_dp_rx_null_q_desc_sg_drop(ar, msdu_len, msdu_list);
		return -EINVAL;
	}

	rx_attention = ath11k_dp_rx_get_attention(ar->ab, desc);
	if (!ath11k_dp_rx_h_attn_msdu_done(rx_attention)) {
		ath11k_warn(ar->ab,
			    "msdu_done bit not set in null_q_des processing\n");
		__skb_queue_purge(msdu_list);
		return -EIO;
	}

	/* Handle NULL queue descriptor violations arising out a missing
	 * REO queue for a given peer or a given TID. This typically
	 * may happen if a packet is received on a QOS enabled TID before the
	 * ADDBA negotiation for that TID, when the TID queue is setup. Or
	 * it may also happen for MC/BC frames if they are not routed to the
	 * non-QOS TID queue, in the absence of any other default TID queue.
	 * This error can show up both in a REO destination or WBM release ring.
	 */

	rxcb->is_first_msdu = ath11k_dp_rx_h_msdu_end_first_msdu(ar->ab, desc);
	rxcb->is_last_msdu = ath11k_dp_rx_h_msdu_end_last_msdu(ar->ab, desc);

	if (rxcb->is_frag) {
		skb_pull(msdu, hal_rx_desc_sz);
	} else {
		l3pad_bytes = ath11k_dp_rx_h_msdu_end_l3pad(ar->ab, desc);

		if ((hal_rx_desc_sz + l3pad_bytes + msdu_len) > DP_RX_BUFFER_SIZE)
			return -EINVAL;

		skb_put(msdu, hal_rx_desc_sz + l3pad_bytes + msdu_len);
		skb_pull(msdu, hal_rx_desc_sz + l3pad_bytes);
	}
	ath11k_dp_rx_h_ppdu(ar, desc, status);

	ath11k_dp_rx_h_mpdu(ar, msdu, desc, status);

	rxcb->tid = ath11k_dp_rx_h_mpdu_start_tid(ar->ab, desc);

	/* Please note that caller will having the access to msdu and completing
	 * rx with mac80211. Need not worry about cleaning up amsdu_list.
	 */

	return 0;
}

static bool ath11k_dp_rx_h_reo_err(struct ath11k *ar, struct sk_buff *msdu,
				   struct ieee80211_rx_status *status,
				   struct sk_buff_head *msdu_list)
{
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(msdu);
	bool drop = false;

	ar->ab->soc_stats.reo_error[rxcb->err_code]++;

	switch (rxcb->err_code) {
	case HAL_REO_DEST_RING_ERROR_CODE_DESC_ADDR_ZERO:
		if (ath11k_dp_rx_h_null_q_desc(ar, msdu, status, msdu_list))
			drop = true;
		break;
	case HAL_REO_DEST_RING_ERROR_CODE_PN_CHECK_FAILED:
		/* TODO: Do not drop PN failed packets in the driver;
		 * instead, it is good to drop such packets in mac80211
		 * after incrementing the replay counters.
		 */
		fallthrough;
	default:
		/* TODO: Review other errors and process them to mac80211
		 * as appropriate.
		 */
		drop = true;
		break;
	}

	return drop;
}

static void ath11k_dp_rx_h_tkip_mic_err(struct ath11k *ar, struct sk_buff *msdu,
					struct ieee80211_rx_status *status)
{
	u16 msdu_len;
	struct hal_rx_desc *desc = (struct hal_rx_desc *)msdu->data;
	u8 l3pad_bytes;
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(msdu);
	u32 hal_rx_desc_sz = ar->ab->hw_params.hal_desc_sz;

	rxcb->is_first_msdu = ath11k_dp_rx_h_msdu_end_first_msdu(ar->ab, desc);
	rxcb->is_last_msdu = ath11k_dp_rx_h_msdu_end_last_msdu(ar->ab, desc);

	l3pad_bytes = ath11k_dp_rx_h_msdu_end_l3pad(ar->ab, desc);
	msdu_len = ath11k_dp_rx_h_msdu_start_msdu_len(ar->ab, desc);
	skb_put(msdu, hal_rx_desc_sz + l3pad_bytes + msdu_len);
	skb_pull(msdu, hal_rx_desc_sz + l3pad_bytes);

	ath11k_dp_rx_h_ppdu(ar, desc, status);

	status->flag |= (RX_FLAG_MMIC_STRIPPED | RX_FLAG_MMIC_ERROR |
			 RX_FLAG_DECRYPTED);

	ath11k_dp_rx_h_undecap(ar, msdu, desc,
			       HAL_ENCRYPT_TYPE_TKIP_MIC, status, false);
}

static bool ath11k_dp_rx_h_rxdma_err(struct ath11k *ar,  struct sk_buff *msdu,
				     struct ieee80211_rx_status *status)
{
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(msdu);
	bool drop = false;

	ar->ab->soc_stats.rxdma_error[rxcb->err_code]++;

	switch (rxcb->err_code) {
	case HAL_REO_ENTR_RING_RXDMA_ECODE_TKIP_MIC_ERR:
		ath11k_dp_rx_h_tkip_mic_err(ar, msdu, status);
		break;
	default:
		/* TODO: Review other rxdma error code to check if anything is
		 * worth reporting to mac80211
		 */
		drop = true;
		break;
	}

	return drop;
}

static void ath11k_dp_rx_wbm_err(struct ath11k *ar,
				 struct napi_struct *napi,
				 struct sk_buff *msdu,
				 struct sk_buff_head *msdu_list)
{
	struct ath11k_skb_rxcb *rxcb = ATH11K_SKB_RXCB(msdu);
	struct ieee80211_rx_status rxs = {0};
	bool drop = true;

	switch (rxcb->err_rel_src) {
	case HAL_WBM_REL_SRC_MODULE_REO:
		drop = ath11k_dp_rx_h_reo_err(ar, msdu, &rxs, msdu_list);
		break;
	case HAL_WBM_REL_SRC_MODULE_RXDMA:
		drop = ath11k_dp_rx_h_rxdma_err(ar, msdu, &rxs);
		break;
	default:
		/* msdu will get freed */
		break;
	}

	if (drop) {
		dev_kfree_skb_any(msdu);
		return;
	}

	ath11k_dp_rx_deliver_msdu(ar, napi, msdu, &rxs);
}

int ath11k_dp_rx_process_wbm_err(struct ath11k_base *ab,
				 struct napi_struct *napi, int budget)
{
	struct ath11k *ar;
	struct ath11k_dp *dp = &ab->dp;
	struct dp_rxdma_ring *rx_ring;
	struct hal_rx_wbm_rel_info err_info;
	struct hal_srng *srng;
	struct sk_buff *msdu;
	struct sk_buff_head msdu_list[MAX_RADIOS];
	struct ath11k_skb_rxcb *rxcb;
	u32 *rx_desc;
	int buf_id, mac_id;
	int num_buffs_reaped[MAX_RADIOS] = {0};
	int total_num_buffs_reaped = 0;
	int ret, i;

	for (i = 0; i < ab->num_radios; i++)
		__skb_queue_head_init(&msdu_list[i]);

	srng = &ab->hal.srng_list[dp->rx_rel_ring.ring_id];

	spin_lock_bh(&srng->lock);

	ath11k_hal_srng_access_begin(ab, srng);

	while (budget) {
		rx_desc = ath11k_hal_srng_dst_get_next_entry(ab, srng);
		if (!rx_desc)
			break;

		ret = ath11k_hal_wbm_desc_parse_err(ab, rx_desc, &err_info);
		if (ret) {
			ath11k_warn(ab,
				    "failed to parse rx error in wbm_rel ring desc %d\n",
				    ret);
			continue;
		}

		buf_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_BUF_ID, err_info.cookie);
		mac_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_PDEV_ID, err_info.cookie);

		ar = ab->pdevs[mac_id].ar;
		rx_ring = &ar->dp.rx_refill_buf_ring;

		spin_lock_bh(&rx_ring->idr_lock);
		msdu = idr_find(&rx_ring->bufs_idr, buf_id);
		if (!msdu) {
			ath11k_warn(ab, "frame rx with invalid buf_id %d pdev %d\n",
				    buf_id, mac_id);
			spin_unlock_bh(&rx_ring->idr_lock);
			continue;
		}

		idr_remove(&rx_ring->bufs_idr, buf_id);
		spin_unlock_bh(&rx_ring->idr_lock);

		rxcb = ATH11K_SKB_RXCB(msdu);
		dma_unmap_single(ab->dev, rxcb->paddr,
				 msdu->len + skb_tailroom(msdu),
				 DMA_FROM_DEVICE);

		num_buffs_reaped[mac_id]++;
		total_num_buffs_reaped++;
		budget--;

		if (err_info.push_reason !=
		    HAL_REO_DEST_RING_PUSH_REASON_ERR_DETECTED) {
			dev_kfree_skb_any(msdu);
			continue;
		}

		rxcb->err_rel_src = err_info.err_rel_src;
		rxcb->err_code = err_info.err_code;
		rxcb->rx_desc = (struct hal_rx_desc *)msdu->data;
		__skb_queue_tail(&msdu_list[mac_id], msdu);
	}

	ath11k_hal_srng_access_end(ab, srng);

	spin_unlock_bh(&srng->lock);

	if (!total_num_buffs_reaped)
		goto done;

	for (i = 0; i <  ab->num_radios; i++) {
		if (!num_buffs_reaped[i])
			continue;

		ar = ab->pdevs[i].ar;
		rx_ring = &ar->dp.rx_refill_buf_ring;

		ath11k_dp_rxbufs_replenish(ab, i, rx_ring, num_buffs_reaped[i],
					   ab->hw_params.hal_params->rx_buf_rbm);
	}

	rcu_read_lock();
	for (i = 0; i <  ab->num_radios; i++) {
		if (!rcu_dereference(ab->pdevs_active[i])) {
			__skb_queue_purge(&msdu_list[i]);
			continue;
		}

		ar = ab->pdevs[i].ar;

		if (test_bit(ATH11K_CAC_RUNNING, &ar->dev_flags)) {
			__skb_queue_purge(&msdu_list[i]);
			continue;
		}

		while ((msdu = __skb_dequeue(&msdu_list[i])) != NULL)
			ath11k_dp_rx_wbm_err(ar, napi, msdu, &msdu_list[i]);
	}
	rcu_read_unlock();
done:
	return total_num_buffs_reaped;
}

int ath11k_dp_process_rxdma_err(struct ath11k_base *ab, int mac_id, int budget)
{
	struct ath11k *ar;
	struct dp_srng *err_ring;
	struct dp_rxdma_ring *rx_ring;
	struct dp_link_desc_bank *link_desc_banks = ab->dp.link_desc_banks;
	struct hal_srng *srng;
	u32 msdu_cookies[HAL_NUM_RX_MSDUS_PER_LINK_DESC];
	enum hal_rx_buf_return_buf_manager rbm;
	enum hal_reo_entr_rxdma_ecode rxdma_err_code;
	struct ath11k_skb_rxcb *rxcb;
	struct sk_buff *skb;
	struct hal_reo_entrance_ring *entr_ring;
	void *desc;
	int num_buf_freed = 0;
	int quota = budget;
	dma_addr_t paddr;
	u32 desc_bank;
	void *link_desc_va;
	int num_msdus;
	int i;
	int buf_id;

	ar = ab->pdevs[ath11k_hw_mac_id_to_pdev_id(&ab->hw_params, mac_id)].ar;
	err_ring = &ar->dp.rxdma_err_dst_ring[ath11k_hw_mac_id_to_srng_id(&ab->hw_params,
									  mac_id)];
	rx_ring = &ar->dp.rx_refill_buf_ring;

	srng = &ab->hal.srng_list[err_ring->ring_id];

	spin_lock_bh(&srng->lock);

	ath11k_hal_srng_access_begin(ab, srng);

	while (quota-- &&
	       (desc = ath11k_hal_srng_dst_get_next_entry(ab, srng))) {
		ath11k_hal_rx_reo_ent_paddr_get(ab, desc, &paddr, &desc_bank);

		entr_ring = (struct hal_reo_entrance_ring *)desc;
		rxdma_err_code =
			FIELD_GET(HAL_REO_ENTR_RING_INFO1_RXDMA_ERROR_CODE,
				  entr_ring->info1);
		ab->soc_stats.rxdma_error[rxdma_err_code]++;

		link_desc_va = link_desc_banks[desc_bank].vaddr +
			       (paddr - link_desc_banks[desc_bank].paddr);
		ath11k_hal_rx_msdu_link_info_get(link_desc_va, &num_msdus,
						 msdu_cookies, &rbm);

		for (i = 0; i < num_msdus; i++) {
			buf_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_BUF_ID,
					   msdu_cookies[i]);

			spin_lock_bh(&rx_ring->idr_lock);
			skb = idr_find(&rx_ring->bufs_idr, buf_id);
			if (!skb) {
				ath11k_warn(ab, "rxdma error with invalid buf_id %d\n",
					    buf_id);
				spin_unlock_bh(&rx_ring->idr_lock);
				continue;
			}

			idr_remove(&rx_ring->bufs_idr, buf_id);
			spin_unlock_bh(&rx_ring->idr_lock);

			rxcb = ATH11K_SKB_RXCB(skb);
			dma_unmap_single(ab->dev, rxcb->paddr,
					 skb->len + skb_tailroom(skb),
					 DMA_FROM_DEVICE);
			dev_kfree_skb_any(skb);

			num_buf_freed++;
		}

		ath11k_dp_rx_link_desc_return(ab, desc,
					      HAL_WBM_REL_BM_ACT_PUT_IN_IDLE);
	}

	ath11k_hal_srng_access_end(ab, srng);

	spin_unlock_bh(&srng->lock);

	if (num_buf_freed)
		ath11k_dp_rxbufs_replenish(ab, mac_id, rx_ring, num_buf_freed,
					   ab->hw_params.hal_params->rx_buf_rbm);

	return budget - quota;
}

void ath11k_dp_process_reo_status(struct ath11k_base *ab)
{
	struct ath11k_dp *dp = &ab->dp;
	struct hal_srng *srng;
	struct dp_reo_cmd *cmd, *tmp;
	bool found = false;
	u32 *reo_desc;
	u16 tag;
	struct hal_reo_status reo_status;

	srng = &ab->hal.srng_list[dp->reo_status_ring.ring_id];

	memset(&reo_status, 0, sizeof(reo_status));

	spin_lock_bh(&srng->lock);

	ath11k_hal_srng_access_begin(ab, srng);

	while ((reo_desc = ath11k_hal_srng_dst_get_next_entry(ab, srng))) {
		tag = FIELD_GET(HAL_SRNG_TLV_HDR_TAG, *reo_desc);

		switch (tag) {
		case HAL_REO_GET_QUEUE_STATS_STATUS:
			ath11k_hal_reo_status_queue_stats(ab, reo_desc,
							  &reo_status);
			break;
		case HAL_REO_FLUSH_QUEUE_STATUS:
			ath11k_hal_reo_flush_queue_status(ab, reo_desc,
							  &reo_status);
			break;
		case HAL_REO_FLUSH_CACHE_STATUS:
			ath11k_hal_reo_flush_cache_status(ab, reo_desc,
							  &reo_status);
			break;
		case HAL_REO_UNBLOCK_CACHE_STATUS:
			ath11k_hal_reo_unblk_cache_status(ab, reo_desc,
							  &reo_status);
			break;
		case HAL_REO_FLUSH_TIMEOUT_LIST_STATUS:
			ath11k_hal_reo_flush_timeout_list_status(ab, reo_desc,
								 &reo_status);
			break;
		case HAL_REO_DESCRIPTOR_THRESHOLD_REACHED_STATUS:
			ath11k_hal_reo_desc_thresh_reached_status(ab, reo_desc,
								  &reo_status);
			break;
		case HAL_REO_UPDATE_RX_REO_QUEUE_STATUS:
			ath11k_hal_reo_update_rx_reo_queue_status(ab, reo_desc,
								  &reo_status);
			break;
		default:
			ath11k_warn(ab, "Unknown reo status type %d\n", tag);
			continue;
		}

		spin_lock_bh(&dp->reo_cmd_lock);
		list_for_each_entry_safe(cmd, tmp, &dp->reo_cmd_list, list) {
			if (reo_status.uniform_hdr.cmd_num == cmd->cmd_num) {
				found = true;
				list_del(&cmd->list);
				break;
			}
		}
		spin_unlock_bh(&dp->reo_cmd_lock);

		if (found) {
			cmd->handler(dp, (void *)&cmd->data,
				     reo_status.uniform_hdr.cmd_status);
			kfree(cmd);
		}

		found = false;
	}

	ath11k_hal_srng_access_end(ab, srng);

	spin_unlock_bh(&srng->lock);
}

void ath11k_dp_rx_pdev_free(struct ath11k_base *ab, int mac_id)
{
	struct ath11k *ar = ab->pdevs[mac_id].ar;

	ath11k_dp_rx_pdev_srng_free(ar);
	ath11k_dp_rxdma_pdev_buf_free(ar);
}

int ath11k_dp_rx_pdev_alloc(struct ath11k_base *ab, int mac_id)
{
	struct ath11k *ar = ab->pdevs[mac_id].ar;
	struct ath11k_pdev_dp *dp = &ar->dp;
	u32 ring_id;
	int i;
	int ret;

	ret = ath11k_dp_rx_pdev_srng_alloc(ar);
	if (ret) {
		ath11k_warn(ab, "failed to setup rx srngs\n");
		return ret;
	}

	ret = ath11k_dp_rxdma_pdev_buf_setup(ar);
	if (ret) {
		ath11k_warn(ab, "failed to setup rxdma ring\n");
		return ret;
	}

	ring_id = dp->rx_refill_buf_ring.refill_buf_ring.ring_id;
	ret = ath11k_dp_tx_htt_srng_setup(ab, ring_id, mac_id, HAL_RXDMA_BUF);
	if (ret) {
		ath11k_warn(ab, "failed to configure rx_refill_buf_ring %d\n",
			    ret);
		return ret;
	}

	if (ab->hw_params.rx_mac_buf_ring) {
		for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
			ring_id = dp->rx_mac_buf_ring[i].ring_id;
			ret = ath11k_dp_tx_htt_srng_setup(ab, ring_id,
							  mac_id + i, HAL_RXDMA_BUF);
			if (ret) {
				ath11k_warn(ab, "failed to configure rx_mac_buf_ring%d %d\n",
					    i, ret);
				return ret;
			}
		}
	}

	for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
		ring_id = dp->rxdma_err_dst_ring[i].ring_id;
		ret = ath11k_dp_tx_htt_srng_setup(ab, ring_id,
						  mac_id + i, HAL_RXDMA_DST);
		if (ret) {
			ath11k_warn(ab, "failed to configure rxdma_err_dest_ring%d %d\n",
				    i, ret);
			return ret;
		}
	}

	if (!ab->hw_params.rxdma1_enable)
		goto config_refill_ring;

	ring_id = dp->rxdma_mon_buf_ring.refill_buf_ring.ring_id;
	ret = ath11k_dp_tx_htt_srng_setup(ab, ring_id,
					  mac_id, HAL_RXDMA_MONITOR_BUF);
	if (ret) {
		ath11k_warn(ab, "failed to configure rxdma_mon_buf_ring %d\n",
			    ret);
		return ret;
	}
	ret = ath11k_dp_tx_htt_srng_setup(ab,
					  dp->rxdma_mon_dst_ring.ring_id,
					  mac_id, HAL_RXDMA_MONITOR_DST);
	if (ret) {
		ath11k_warn(ab, "failed to configure rxdma_mon_dst_ring %d\n",
			    ret);
		return ret;
	}
	ret = ath11k_dp_tx_htt_srng_setup(ab,
					  dp->rxdma_mon_desc_ring.ring_id,
					  mac_id, HAL_RXDMA_MONITOR_DESC);
	if (ret) {
		ath11k_warn(ab, "failed to configure rxdma_mon_dst_ring %d\n",
			    ret);
		return ret;
	}

config_refill_ring:
	for (i = 0; i < ab->hw_params.num_rxmda_per_pdev; i++) {
		ring_id = dp->rx_mon_status_refill_ring[i].refill_buf_ring.ring_id;
		ret = ath11k_dp_tx_htt_srng_setup(ab, ring_id, mac_id + i,
						  HAL_RXDMA_MONITOR_STATUS);
		if (ret) {
			ath11k_warn(ab,
				    "failed to configure mon_status_refill_ring%d %d\n",
				    i, ret);
			return ret;
		}
	}

	return 0;
}

static void ath11k_dp_mon_set_frag_len(u32 *total_len, u32 *frag_len)
{
	if (*total_len >= (DP_RX_BUFFER_SIZE - sizeof(struct hal_rx_desc))) {
		*frag_len = DP_RX_BUFFER_SIZE - sizeof(struct hal_rx_desc);
		*total_len -= *frag_len;
	} else {
		*frag_len = *total_len;
		*total_len = 0;
	}
}

static
int ath11k_dp_rx_monitor_link_desc_return(struct ath11k *ar,
					  void *p_last_buf_addr_info,
					  u8 mac_id)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct dp_srng *dp_srng;
	void *hal_srng;
	void *src_srng_desc;
	int ret = 0;

	if (ar->ab->hw_params.rxdma1_enable) {
		dp_srng = &dp->rxdma_mon_desc_ring;
		hal_srng = &ar->ab->hal.srng_list[dp_srng->ring_id];
	} else {
		dp_srng = &ar->ab->dp.wbm_desc_rel_ring;
		hal_srng = &ar->ab->hal.srng_list[dp_srng->ring_id];
	}

	ath11k_hal_srng_access_begin(ar->ab, hal_srng);

	src_srng_desc = ath11k_hal_srng_src_get_next_entry(ar->ab, hal_srng);

	if (src_srng_desc) {
		struct ath11k_buffer_addr *src_desc =
				(struct ath11k_buffer_addr *)src_srng_desc;

		*src_desc = *((struct ath11k_buffer_addr *)p_last_buf_addr_info);
	} else {
		ath11k_dbg(ar->ab, ATH11K_DBG_DATA,
			   "Monitor Link Desc Ring %d Full", mac_id);
		ret = -ENOMEM;
	}

	ath11k_hal_srng_access_end(ar->ab, hal_srng);
	return ret;
}

static
void ath11k_dp_rx_mon_next_link_desc_get(void *rx_msdu_link_desc,
					 dma_addr_t *paddr, u32 *sw_cookie,
					 u8 *rbm,
					 void **pp_buf_addr_info)
{
	struct hal_rx_msdu_link *msdu_link =
			(struct hal_rx_msdu_link *)rx_msdu_link_desc;
	struct ath11k_buffer_addr *buf_addr_info;

	buf_addr_info = (struct ath11k_buffer_addr *)&msdu_link->buf_addr_info;

	ath11k_hal_rx_buf_addr_info_get(buf_addr_info, paddr, sw_cookie, rbm);

	*pp_buf_addr_info = (void *)buf_addr_info;
}

static int ath11k_dp_pkt_set_pktlen(struct sk_buff *skb, u32 len)
{
	if (skb->len > len) {
		skb_trim(skb, len);
	} else {
		if (skb_tailroom(skb) < len - skb->len) {
			if ((pskb_expand_head(skb, 0,
					      len - skb->len - skb_tailroom(skb),
					      GFP_ATOMIC))) {
				dev_kfree_skb_any(skb);
				return -ENOMEM;
			}
		}
		skb_put(skb, (len - skb->len));
	}
	return 0;
}

static void ath11k_hal_rx_msdu_list_get(struct ath11k *ar,
					void *msdu_link_desc,
					struct hal_rx_msdu_list *msdu_list,
					u16 *num_msdus)
{
	struct hal_rx_msdu_details *msdu_details = NULL;
	struct rx_msdu_desc *msdu_desc_info = NULL;
	struct hal_rx_msdu_link *msdu_link = NULL;
	int i;
	u32 last = FIELD_PREP(RX_MSDU_DESC_INFO0_LAST_MSDU_IN_MPDU, 1);
	u32 first = FIELD_PREP(RX_MSDU_DESC_INFO0_FIRST_MSDU_IN_MPDU, 1);
	u8  tmp  = 0;

	msdu_link = (struct hal_rx_msdu_link *)msdu_link_desc;
	msdu_details = &msdu_link->msdu_link[0];

	for (i = 0; i < HAL_RX_NUM_MSDU_DESC; i++) {
		if (FIELD_GET(BUFFER_ADDR_INFO0_ADDR,
			      msdu_details[i].buf_addr_info.info0) == 0) {
			msdu_desc_info = &msdu_details[i - 1].rx_msdu_info;
			msdu_desc_info->info0 |= last;
			;
			break;
		}
		msdu_desc_info = &msdu_details[i].rx_msdu_info;

		if (!i)
			msdu_desc_info->info0 |= first;
		else if (i == (HAL_RX_NUM_MSDU_DESC - 1))
			msdu_desc_info->info0 |= last;
		msdu_list->msdu_info[i].msdu_flags = msdu_desc_info->info0;
		msdu_list->msdu_info[i].msdu_len =
			 HAL_RX_MSDU_PKT_LENGTH_GET(msdu_desc_info->info0);
		msdu_list->sw_cookie[i] =
			FIELD_GET(BUFFER_ADDR_INFO1_SW_COOKIE,
				  msdu_details[i].buf_addr_info.info1);
		tmp = FIELD_GET(BUFFER_ADDR_INFO1_RET_BUF_MGR,
				msdu_details[i].buf_addr_info.info1);
		msdu_list->rbm[i] = tmp;
	}
	*num_msdus = i;
}

static u32 ath11k_dp_rx_mon_comp_ppduid(u32 msdu_ppdu_id, u32 *ppdu_id,
					u32 *rx_bufs_used)
{
	u32 ret = 0;

	if ((*ppdu_id < msdu_ppdu_id) &&
	    ((msdu_ppdu_id - *ppdu_id) < DP_NOT_PPDU_ID_WRAP_AROUND)) {
		*ppdu_id = msdu_ppdu_id;
		ret = msdu_ppdu_id;
	} else if ((*ppdu_id > msdu_ppdu_id) &&
		((*ppdu_id - msdu_ppdu_id) > DP_NOT_PPDU_ID_WRAP_AROUND)) {
		/* mon_dst is behind than mon_status
		 * skip dst_ring and free it
		 */
		*rx_bufs_used += 1;
		*ppdu_id = msdu_ppdu_id;
		ret = msdu_ppdu_id;
	}
	return ret;
}

static void ath11k_dp_mon_get_buf_len(struct hal_rx_msdu_desc_info *info,
				      bool *is_frag, u32 *total_len,
				      u32 *frag_len, u32 *msdu_cnt)
{
	if (info->msdu_flags & RX_MSDU_DESC_INFO0_MSDU_CONTINUATION) {
		if (!*is_frag) {
			*total_len = info->msdu_len;
			*is_frag = true;
		}
		ath11k_dp_mon_set_frag_len(total_len,
					   frag_len);
	} else {
		if (*is_frag) {
			ath11k_dp_mon_set_frag_len(total_len,
						   frag_len);
		} else {
			*frag_len = info->msdu_len;
		}
		*is_frag = false;
		*msdu_cnt -= 1;
	}
}

static u32
ath11k_dp_rx_mon_mpdu_pop(struct ath11k *ar, int mac_id,
			  void *ring_entry, struct sk_buff **head_msdu,
			  struct sk_buff **tail_msdu, u32 *npackets,
			  u32 *ppdu_id)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_mon_data *pmon = (struct ath11k_mon_data *)&dp->mon_data;
	struct dp_rxdma_ring *rx_ring = &dp->rxdma_mon_buf_ring;
	struct sk_buff *msdu = NULL, *last = NULL;
	struct hal_rx_msdu_list msdu_list;
	void *p_buf_addr_info, *p_last_buf_addr_info;
	struct hal_rx_desc *rx_desc;
	void *rx_msdu_link_desc;
	dma_addr_t paddr;
	u16 num_msdus = 0;
	u32 rx_buf_size, rx_pkt_offset, sw_cookie;
	u32 rx_bufs_used = 0, i = 0;
	u32 msdu_ppdu_id = 0, msdu_cnt = 0;
	u32 total_len = 0, frag_len = 0;
	bool is_frag, is_first_msdu;
	bool drop_mpdu = false;
	struct ath11k_skb_rxcb *rxcb;
	struct hal_reo_entrance_ring *ent_desc =
			(struct hal_reo_entrance_ring *)ring_entry;
	int buf_id;
	u32 rx_link_buf_info[2];
	u8 rbm;

	if (!ar->ab->hw_params.rxdma1_enable)
		rx_ring = &dp->rx_refill_buf_ring;

	ath11k_hal_rx_reo_ent_buf_paddr_get(ring_entry, &paddr,
					    &sw_cookie,
					    &p_last_buf_addr_info, &rbm,
					    &msdu_cnt);

	if (FIELD_GET(HAL_REO_ENTR_RING_INFO1_RXDMA_PUSH_REASON,
		      ent_desc->info1) ==
		      HAL_REO_DEST_RING_PUSH_REASON_ERR_DETECTED) {
		u8 rxdma_err =
			FIELD_GET(HAL_REO_ENTR_RING_INFO1_RXDMA_ERROR_CODE,
				  ent_desc->info1);
		if (rxdma_err == HAL_REO_ENTR_RING_RXDMA_ECODE_FLUSH_REQUEST_ERR ||
		    rxdma_err == HAL_REO_ENTR_RING_RXDMA_ECODE_MPDU_LEN_ERR ||
		    rxdma_err == HAL_REO_ENTR_RING_RXDMA_ECODE_OVERFLOW_ERR) {
			drop_mpdu = true;
			pmon->rx_mon_stats.dest_mpdu_drop++;
		}
	}

	is_frag = false;
	is_first_msdu = true;

	do {
		if (pmon->mon_last_linkdesc_paddr == paddr) {
			pmon->rx_mon_stats.dup_mon_linkdesc_cnt++;
			return rx_bufs_used;
		}

		if (ar->ab->hw_params.rxdma1_enable)
			rx_msdu_link_desc =
				(void *)pmon->link_desc_banks[sw_cookie].vaddr +
				(paddr - pmon->link_desc_banks[sw_cookie].paddr);
		else
			rx_msdu_link_desc =
				(void *)ar->ab->dp.link_desc_banks[sw_cookie].vaddr +
				(paddr - ar->ab->dp.link_desc_banks[sw_cookie].paddr);

		ath11k_hal_rx_msdu_list_get(ar, rx_msdu_link_desc, &msdu_list,
					    &num_msdus);

		for (i = 0; i < num_msdus; i++) {
			u32 l2_hdr_offset;

			if (pmon->mon_last_buf_cookie == msdu_list.sw_cookie[i]) {
				ath11k_dbg(ar->ab, ATH11K_DBG_DATA,
					   "i %d last_cookie %d is same\n",
					   i, pmon->mon_last_buf_cookie);
				drop_mpdu = true;
				pmon->rx_mon_stats.dup_mon_buf_cnt++;
				continue;
			}
			buf_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_BUF_ID,
					   msdu_list.sw_cookie[i]);

			spin_lock_bh(&rx_ring->idr_lock);
			msdu = idr_find(&rx_ring->bufs_idr, buf_id);
			spin_unlock_bh(&rx_ring->idr_lock);
			if (!msdu) {
				ath11k_dbg(ar->ab, ATH11K_DBG_DATA,
					   "msdu_pop: invalid buf_id %d\n", buf_id);
				break;
			}
			rxcb = ATH11K_SKB_RXCB(msdu);
			if (!rxcb->unmapped) {
				dma_unmap_single(ar->ab->dev, rxcb->paddr,
						 msdu->len +
						 skb_tailroom(msdu),
						 DMA_FROM_DEVICE);
				rxcb->unmapped = 1;
			}
			if (drop_mpdu) {
				ath11k_dbg(ar->ab, ATH11K_DBG_DATA,
					   "i %d drop msdu %p *ppdu_id %x\n",
					   i, msdu, *ppdu_id);
				dev_kfree_skb_any(msdu);
				msdu = NULL;
				goto next_msdu;
			}

			rx_desc = (struct hal_rx_desc *)msdu->data;

			rx_pkt_offset = sizeof(struct hal_rx_desc);
			l2_hdr_offset = ath11k_dp_rx_h_msdu_end_l3pad(ar->ab, rx_desc);

			if (is_first_msdu) {
				if (!ath11k_dp_rxdesc_mpdu_valid(ar->ab, rx_desc)) {
					drop_mpdu = true;
					dev_kfree_skb_any(msdu);
					msdu = NULL;
					pmon->mon_last_linkdesc_paddr = paddr;
					goto next_msdu;
				}

				msdu_ppdu_id =
					ath11k_dp_rxdesc_get_ppduid(ar->ab, rx_desc);

				if (ath11k_dp_rx_mon_comp_ppduid(msdu_ppdu_id,
								 ppdu_id,
								 &rx_bufs_used)) {
					if (rx_bufs_used) {
						drop_mpdu = true;
						dev_kfree_skb_any(msdu);
						msdu = NULL;
						goto next_msdu;
					}
					return rx_bufs_used;
				}
				pmon->mon_last_linkdesc_paddr = paddr;
				is_first_msdu = false;
			}
			ath11k_dp_mon_get_buf_len(&msdu_list.msdu_info[i],
						  &is_frag, &total_len,
						  &frag_len, &msdu_cnt);
			rx_buf_size = rx_pkt_offset + l2_hdr_offset + frag_len;

			ath11k_dp_pkt_set_pktlen(msdu, rx_buf_size);

			if (!(*head_msdu))
				*head_msdu = msdu;
			else if (last)
				last->next = msdu;

			last = msdu;
next_msdu:
			pmon->mon_last_buf_cookie = msdu_list.sw_cookie[i];
			rx_bufs_used++;
			spin_lock_bh(&rx_ring->idr_lock);
			idr_remove(&rx_ring->bufs_idr, buf_id);
			spin_unlock_bh(&rx_ring->idr_lock);
		}

		ath11k_hal_rx_buf_addr_info_set(rx_link_buf_info, paddr, sw_cookie, rbm);

		ath11k_dp_rx_mon_next_link_desc_get(rx_msdu_link_desc, &paddr,
						    &sw_cookie, &rbm,
						    &p_buf_addr_info);

		if (ar->ab->hw_params.rxdma1_enable) {
			if (ath11k_dp_rx_monitor_link_desc_return(ar,
								  p_last_buf_addr_info,
								  dp->mac_id))
				ath11k_dbg(ar->ab, ATH11K_DBG_DATA,
					   "dp_rx_monitor_link_desc_return failed");
		} else {
			ath11k_dp_rx_link_desc_return(ar->ab, rx_link_buf_info,
						      HAL_WBM_REL_BM_ACT_PUT_IN_IDLE);
		}

		p_last_buf_addr_info = p_buf_addr_info;

	} while (paddr && msdu_cnt);

	if (last)
		last->next = NULL;

	*tail_msdu = msdu;

	if (msdu_cnt == 0)
		*npackets = 1;

	return rx_bufs_used;
}

static void ath11k_dp_rx_msdus_set_payload(struct ath11k *ar, struct sk_buff *msdu)
{
	u32 rx_pkt_offset, l2_hdr_offset;

	rx_pkt_offset = ar->ab->hw_params.hal_desc_sz;
	l2_hdr_offset = ath11k_dp_rx_h_msdu_end_l3pad(ar->ab,
						      (struct hal_rx_desc *)msdu->data);
	skb_pull(msdu, rx_pkt_offset + l2_hdr_offset);
}

static struct sk_buff *
ath11k_dp_rx_mon_merg_msdus(struct ath11k *ar,
			    u32 mac_id, struct sk_buff *head_msdu,
			    struct sk_buff *last_msdu,
			    struct ieee80211_rx_status *rxs, bool *fcs_err)
{
	struct ath11k_base *ab = ar->ab;
	struct sk_buff *msdu, *prev_buf;
	struct hal_rx_desc *rx_desc;
	char *hdr_desc;
	u8 *dest, decap_format;
	struct ieee80211_hdr_3addr *wh;
	struct rx_attention *rx_attention;
	u32 err_bitmap;

	if (!head_msdu)
		goto err_merge_fail;

	rx_desc = (struct hal_rx_desc *)head_msdu->data;
	rx_attention = ath11k_dp_rx_get_attention(ab, rx_desc);
	err_bitmap = ath11k_dp_rx_h_attn_mpdu_err(rx_attention);

	if (err_bitmap & DP_RX_MPDU_ERR_FCS)
		*fcs_err = true;

	if (ath11k_dp_rxdesc_get_mpdulen_err(rx_attention))
		return NULL;

	decap_format = ath11k_dp_rx_h_msdu_start_decap_type(ab, rx_desc);

	ath11k_dp_rx_h_ppdu(ar, rx_desc, rxs);

	if (decap_format == DP_RX_DECAP_TYPE_RAW) {
		ath11k_dp_rx_msdus_set_payload(ar, head_msdu);

		prev_buf = head_msdu;
		msdu = head_msdu->next;

		while (msdu) {
			ath11k_dp_rx_msdus_set_payload(ar, msdu);

			prev_buf = msdu;
			msdu = msdu->next;
		}

		prev_buf->next = NULL;

		skb_trim(prev_buf, prev_buf->len - HAL_RX_FCS_LEN);
	} else if (decap_format == DP_RX_DECAP_TYPE_NATIVE_WIFI) {
		u8 qos_pkt = 0;

		rx_desc = (struct hal_rx_desc *)head_msdu->data;
		hdr_desc = ath11k_dp_rxdesc_get_80211hdr(ab, rx_desc);

		/* Base size */
		wh = (struct ieee80211_hdr_3addr *)hdr_desc;

		if (ieee80211_is_data_qos(wh->frame_control))
			qos_pkt = 1;

		msdu = head_msdu;

		while (msdu) {
			ath11k_dp_rx_msdus_set_payload(ar, msdu);
			if (qos_pkt) {
				dest = skb_push(msdu, sizeof(__le16));
				if (!dest)
					goto err_merge_fail;
				memcpy(dest, hdr_desc, sizeof(struct ieee80211_qos_hdr));
			}
			prev_buf = msdu;
			msdu = msdu->next;
		}
		dest = skb_put(prev_buf, HAL_RX_FCS_LEN);
		if (!dest)
			goto err_merge_fail;

		ath11k_dbg(ab, ATH11K_DBG_DATA,
			   "mpdu_buf %p mpdu_buf->len %u",
			   prev_buf, prev_buf->len);
	} else {
		ath11k_dbg(ab, ATH11K_DBG_DATA,
			   "decap format %d is not supported!\n",
			   decap_format);
		goto err_merge_fail;
	}

	return head_msdu;

err_merge_fail:
	return NULL;
}

static void
ath11k_dp_rx_update_radiotap_he(struct hal_rx_mon_ppdu_info *rx_status,
				u8 *rtap_buf)
{
	u32 rtap_len = 0;

	put_unaligned_le16(rx_status->he_data1, &rtap_buf[rtap_len]);
	rtap_len += 2;

	put_unaligned_le16(rx_status->he_data2, &rtap_buf[rtap_len]);
	rtap_len += 2;

	put_unaligned_le16(rx_status->he_data3, &rtap_buf[rtap_len]);
	rtap_len += 2;

	put_unaligned_le16(rx_status->he_data4, &rtap_buf[rtap_len]);
	rtap_len += 2;

	put_unaligned_le16(rx_status->he_data5, &rtap_buf[rtap_len]);
	rtap_len += 2;

	put_unaligned_le16(rx_status->he_data6, &rtap_buf[rtap_len]);
}

static void
ath11k_dp_rx_update_radiotap_he_mu(struct hal_rx_mon_ppdu_info *rx_status,
				   u8 *rtap_buf)
{
	u32 rtap_len = 0;

	put_unaligned_le16(rx_status->he_flags1, &rtap_buf[rtap_len]);
	rtap_len += 2;

	put_unaligned_le16(rx_status->he_flags2, &rtap_buf[rtap_len]);
	rtap_len += 2;

	rtap_buf[rtap_len] = rx_status->he_RU[0];
	rtap_len += 1;

	rtap_buf[rtap_len] = rx_status->he_RU[1];
	rtap_len += 1;

	rtap_buf[rtap_len] = rx_status->he_RU[2];
	rtap_len += 1;

	rtap_buf[rtap_len] = rx_status->he_RU[3];
}

static void ath11k_update_radiotap(struct ath11k *ar,
				   struct hal_rx_mon_ppdu_info *ppduinfo,
				   struct sk_buff *mon_skb,
				   struct ieee80211_rx_status *rxs)
{
	struct ieee80211_supported_band *sband;
	u8 *ptr = NULL;

	rxs->flag |= RX_FLAG_MACTIME_START;
	rxs->signal = ppduinfo->rssi_comb + ATH11K_DEFAULT_NOISE_FLOOR;

	if (ppduinfo->nss)
		rxs->nss = ppduinfo->nss;

	if (ppduinfo->he_mu_flags) {
		rxs->flag |= RX_FLAG_RADIOTAP_HE_MU;
		rxs->encoding = RX_ENC_HE;
		ptr = skb_push(mon_skb, sizeof(struct ieee80211_radiotap_he_mu));
		ath11k_dp_rx_update_radiotap_he_mu(ppduinfo, ptr);
	} else if (ppduinfo->he_flags) {
		rxs->flag |= RX_FLAG_RADIOTAP_HE;
		rxs->encoding = RX_ENC_HE;
		ptr = skb_push(mon_skb, sizeof(struct ieee80211_radiotap_he));
		ath11k_dp_rx_update_radiotap_he(ppduinfo, ptr);
		rxs->rate_idx = ppduinfo->rate;
	} else if (ppduinfo->vht_flags) {
		rxs->encoding = RX_ENC_VHT;
		rxs->rate_idx = ppduinfo->rate;
	} else if (ppduinfo->ht_flags) {
		rxs->encoding = RX_ENC_HT;
		rxs->rate_idx = ppduinfo->rate;
	} else {
		rxs->encoding = RX_ENC_LEGACY;
		sband = &ar->mac.sbands[rxs->band];
		rxs->rate_idx = ath11k_mac_hw_rate_to_idx(sband, ppduinfo->rate,
							  ppduinfo->cck_flag);
	}

	rxs->mactime = ppduinfo->tsft;
}

static int ath11k_dp_rx_mon_deliver(struct ath11k *ar, u32 mac_id,
				    struct sk_buff *head_msdu,
				    struct hal_rx_mon_ppdu_info *ppduinfo,
				    struct sk_buff *tail_msdu,
				    struct napi_struct *napi)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct sk_buff *mon_skb, *skb_next, *header;
	struct ieee80211_rx_status *rxs = &dp->rx_status;
	bool fcs_err = false;

	mon_skb = ath11k_dp_rx_mon_merg_msdus(ar, mac_id, head_msdu,
					      tail_msdu, rxs, &fcs_err);

	if (!mon_skb)
		goto mon_deliver_fail;

	header = mon_skb;

	rxs->flag = 0;

	if (fcs_err)
		rxs->flag = RX_FLAG_FAILED_FCS_CRC;

	do {
		skb_next = mon_skb->next;
		if (!skb_next)
			rxs->flag &= ~RX_FLAG_AMSDU_MORE;
		else
			rxs->flag |= RX_FLAG_AMSDU_MORE;

		if (mon_skb == header) {
			header = NULL;
			rxs->flag &= ~RX_FLAG_ALLOW_SAME_PN;
		} else {
			rxs->flag |= RX_FLAG_ALLOW_SAME_PN;
		}
		rxs->flag |= RX_FLAG_ONLY_MONITOR;
		ath11k_update_radiotap(ar, ppduinfo, mon_skb, rxs);

		ath11k_dp_rx_deliver_msdu(ar, napi, mon_skb, rxs);
		mon_skb = skb_next;
	} while (mon_skb);
	rxs->flag = 0;

	return 0;

mon_deliver_fail:
	mon_skb = head_msdu;
	while (mon_skb) {
		skb_next = mon_skb->next;
		dev_kfree_skb_any(mon_skb);
		mon_skb = skb_next;
	}
	return -EINVAL;
}

/* The destination ring processing is stuck if the destination is not
 * moving while status ring moves 16 PPDU. The destination ring processing
 * skips this destination ring PPDU as a workaround.
 */
#define MON_DEST_RING_STUCK_MAX_CNT 16

static void ath11k_dp_rx_mon_dest_process(struct ath11k *ar, int mac_id,
					  u32 quota, struct napi_struct *napi)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_mon_data *pmon = (struct ath11k_mon_data *)&dp->mon_data;
	const struct ath11k_hw_hal_params *hal_params;
	void *ring_entry;
	void *mon_dst_srng;
	u32 ppdu_id;
	u32 rx_bufs_used;
	u32 ring_id;
	struct ath11k_pdev_mon_stats *rx_mon_stats;
	u32	 npackets = 0;
	u32 mpdu_rx_bufs_used;

	if (ar->ab->hw_params.rxdma1_enable)
		ring_id = dp->rxdma_mon_dst_ring.ring_id;
	else
		ring_id = dp->rxdma_err_dst_ring[mac_id].ring_id;

	mon_dst_srng = &ar->ab->hal.srng_list[ring_id];

	if (!mon_dst_srng) {
		ath11k_warn(ar->ab,
			    "HAL Monitor Destination Ring Init Failed -- %p",
			    mon_dst_srng);
		return;
	}

	spin_lock_bh(&pmon->mon_lock);

	ath11k_hal_srng_access_begin(ar->ab, mon_dst_srng);

	ppdu_id = pmon->mon_ppdu_info.ppdu_id;
	rx_bufs_used = 0;
	rx_mon_stats = &pmon->rx_mon_stats;

	while ((ring_entry = ath11k_hal_srng_dst_peek(ar->ab, mon_dst_srng))) {
		struct sk_buff *head_msdu, *tail_msdu;

		head_msdu = NULL;
		tail_msdu = NULL;

		mpdu_rx_bufs_used = ath11k_dp_rx_mon_mpdu_pop(ar, mac_id, ring_entry,
							      &head_msdu,
							      &tail_msdu,
							      &npackets, &ppdu_id);

		rx_bufs_used += mpdu_rx_bufs_used;

		if (mpdu_rx_bufs_used) {
			dp->mon_dest_ring_stuck_cnt = 0;
		} else {
			dp->mon_dest_ring_stuck_cnt++;
			rx_mon_stats->dest_mon_not_reaped++;
		}

		if (dp->mon_dest_ring_stuck_cnt > MON_DEST_RING_STUCK_MAX_CNT) {
			rx_mon_stats->dest_mon_stuck++;
			ath11k_dbg(ar->ab, ATH11K_DBG_DATA,
				   "status ring ppdu_id=%d dest ring ppdu_id=%d mon_dest_ring_stuck_cnt=%d dest_mon_not_reaped=%u dest_mon_stuck=%u\n",
				   pmon->mon_ppdu_info.ppdu_id, ppdu_id,
				   dp->mon_dest_ring_stuck_cnt,
				   rx_mon_stats->dest_mon_not_reaped,
				   rx_mon_stats->dest_mon_stuck);
			pmon->mon_ppdu_info.ppdu_id = ppdu_id;
			continue;
		}

		if (ppdu_id != pmon->mon_ppdu_info.ppdu_id) {
			pmon->mon_ppdu_status = DP_PPDU_STATUS_START;
			ath11k_dbg(ar->ab, ATH11K_DBG_DATA,
				   "dest_rx: new ppdu_id %x != status ppdu_id %x dest_mon_not_reaped = %u dest_mon_stuck = %u\n",
				   ppdu_id, pmon->mon_ppdu_info.ppdu_id,
				   rx_mon_stats->dest_mon_not_reaped,
				   rx_mon_stats->dest_mon_stuck);
			break;
		}
		if (head_msdu && tail_msdu) {
			ath11k_dp_rx_mon_deliver(ar, dp->mac_id, head_msdu,
						 &pmon->mon_ppdu_info,
						 tail_msdu, napi);
			rx_mon_stats->dest_mpdu_done++;
		}

		ring_entry = ath11k_hal_srng_dst_get_next_entry(ar->ab,
								mon_dst_srng);
	}
	ath11k_hal_srng_access_end(ar->ab, mon_dst_srng);

	spin_unlock_bh(&pmon->mon_lock);

	if (rx_bufs_used) {
		rx_mon_stats->dest_ppdu_done++;
		hal_params = ar->ab->hw_params.hal_params;

		if (ar->ab->hw_params.rxdma1_enable)
			ath11k_dp_rxbufs_replenish(ar->ab, dp->mac_id,
						   &dp->rxdma_mon_buf_ring,
						   rx_bufs_used,
						   hal_params->rx_buf_rbm);
		else
			ath11k_dp_rxbufs_replenish(ar->ab, dp->mac_id,
						   &dp->rx_refill_buf_ring,
						   rx_bufs_used,
						   hal_params->rx_buf_rbm);
	}
}

int ath11k_dp_rx_process_mon_status(struct ath11k_base *ab, int mac_id,
				    struct napi_struct *napi, int budget)
{
	struct ath11k *ar = ath11k_ab_to_ar(ab, mac_id);
	enum hal_rx_mon_status hal_status;
	struct sk_buff *skb;
	struct sk_buff_head skb_list;
	struct ath11k_peer *peer;
	struct ath11k_sta *arsta;
	int num_buffs_reaped = 0;
	u32 rx_buf_sz;
	u16 log_type;
	struct ath11k_mon_data *pmon = (struct ath11k_mon_data *)&ar->dp.mon_data;
	struct ath11k_pdev_mon_stats *rx_mon_stats = &pmon->rx_mon_stats;
	struct hal_rx_mon_ppdu_info *ppdu_info = &pmon->mon_ppdu_info;

	__skb_queue_head_init(&skb_list);

	num_buffs_reaped = ath11k_dp_rx_reap_mon_status_ring(ab, mac_id, &budget,
							     &skb_list);
	if (!num_buffs_reaped)
		goto exit;

	memset(ppdu_info, 0, sizeof(*ppdu_info));
	ppdu_info->peer_id = HAL_INVALID_PEERID;

	while ((skb = __skb_dequeue(&skb_list))) {
		if (ath11k_debugfs_is_pktlog_lite_mode_enabled(ar)) {
			log_type = ATH11K_PKTLOG_TYPE_LITE_RX;
			rx_buf_sz = DP_RX_BUFFER_SIZE_LITE;
		} else if (ath11k_debugfs_is_pktlog_rx_stats_enabled(ar)) {
			log_type = ATH11K_PKTLOG_TYPE_RX_STATBUF;
			rx_buf_sz = DP_RX_BUFFER_SIZE;
		} else {
			log_type = ATH11K_PKTLOG_TYPE_INVALID;
			rx_buf_sz = 0;
		}

		if (log_type != ATH11K_PKTLOG_TYPE_INVALID)
			trace_ath11k_htt_rxdesc(ar, skb->data, log_type, rx_buf_sz);

		memset(ppdu_info, 0, sizeof(*ppdu_info));
		ppdu_info->peer_id = HAL_INVALID_PEERID;
		hal_status = ath11k_hal_rx_parse_mon_status(ab, ppdu_info, skb);

		if (test_bit(ATH11K_FLAG_MONITOR_STARTED, &ar->monitor_flags) &&
		    pmon->mon_ppdu_status == DP_PPDU_STATUS_START &&
		    hal_status == HAL_TLV_STATUS_PPDU_DONE) {
			rx_mon_stats->status_ppdu_done++;
			pmon->mon_ppdu_status = DP_PPDU_STATUS_DONE;
			ath11k_dp_rx_mon_dest_process(ar, mac_id, budget, napi);
			pmon->mon_ppdu_status = DP_PPDU_STATUS_START;
		}

		if (ppdu_info->peer_id == HAL_INVALID_PEERID ||
		    hal_status != HAL_RX_MON_STATUS_PPDU_DONE) {
			dev_kfree_skb_any(skb);
			continue;
		}

		rcu_read_lock();
		spin_lock_bh(&ab->base_lock);
		peer = ath11k_peer_find_by_id(ab, ppdu_info->peer_id);

		if (!peer || !peer->sta) {
			ath11k_dbg(ab, ATH11K_DBG_DATA,
				   "failed to find the peer with peer_id %d\n",
				   ppdu_info->peer_id);
			goto next_skb;
		}

		arsta = (struct ath11k_sta *)peer->sta->drv_priv;
		ath11k_dp_rx_update_peer_stats(arsta, ppdu_info);

		if (ath11k_debugfs_is_pktlog_peer_valid(ar, peer->addr))
			trace_ath11k_htt_rxdesc(ar, skb->data, log_type, rx_buf_sz);

next_skb:
		spin_unlock_bh(&ab->base_lock);
		rcu_read_unlock();

		dev_kfree_skb_any(skb);
		memset(ppdu_info, 0, sizeof(*ppdu_info));
		ppdu_info->peer_id = HAL_INVALID_PEERID;
	}
exit:
	return num_buffs_reaped;
}

static u32
ath11k_dp_rx_full_mon_mpdu_pop(struct ath11k *ar,
			       void *ring_entry, struct sk_buff **head_msdu,
			       struct sk_buff **tail_msdu,
			       struct hal_sw_mon_ring_entries *sw_mon_entries)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_mon_data *pmon = &dp->mon_data;
	struct dp_rxdma_ring *rx_ring = &dp->rxdma_mon_buf_ring;
	struct sk_buff *msdu = NULL, *last = NULL;
	struct hal_sw_monitor_ring *sw_desc = ring_entry;
	struct hal_rx_msdu_list msdu_list;
	struct hal_rx_desc *rx_desc;
	struct ath11k_skb_rxcb *rxcb;
	void *rx_msdu_link_desc;
	void *p_buf_addr_info, *p_last_buf_addr_info;
	int buf_id, i = 0;
	u32 rx_buf_size, rx_pkt_offset, l2_hdr_offset;
	u32 rx_bufs_used = 0, msdu_cnt = 0;
	u32 total_len = 0, frag_len = 0, sw_cookie;
	u16 num_msdus = 0;
	u8 rxdma_err, rbm;
	bool is_frag, is_first_msdu;
	bool drop_mpdu = false;

	ath11k_hal_rx_sw_mon_ring_buf_paddr_get(ring_entry, sw_mon_entries);

	sw_cookie = sw_mon_entries->mon_dst_sw_cookie;
	sw_mon_entries->end_of_ppdu = false;
	sw_mon_entries->drop_ppdu = false;
	p_last_buf_addr_info = sw_mon_entries->dst_buf_addr_info;
	msdu_cnt = sw_mon_entries->msdu_cnt;

	sw_mon_entries->end_of_ppdu =
		FIELD_GET(HAL_SW_MON_RING_INFO0_END_OF_PPDU, sw_desc->info0);
	if (sw_mon_entries->end_of_ppdu)
		return rx_bufs_used;

	if (FIELD_GET(HAL_SW_MON_RING_INFO0_RXDMA_PUSH_REASON,
		      sw_desc->info0) ==
		      HAL_REO_DEST_RING_PUSH_REASON_ERR_DETECTED) {
		rxdma_err =
			FIELD_GET(HAL_SW_MON_RING_INFO0_RXDMA_ERROR_CODE,
				  sw_desc->info0);
		if (rxdma_err == HAL_REO_ENTR_RING_RXDMA_ECODE_FLUSH_REQUEST_ERR ||
		    rxdma_err == HAL_REO_ENTR_RING_RXDMA_ECODE_MPDU_LEN_ERR ||
		    rxdma_err == HAL_REO_ENTR_RING_RXDMA_ECODE_OVERFLOW_ERR) {
			pmon->rx_mon_stats.dest_mpdu_drop++;
			drop_mpdu = true;
		}
	}

	is_frag = false;
	is_first_msdu = true;

	do {
		rx_msdu_link_desc =
			(u8 *)pmon->link_desc_banks[sw_cookie].vaddr +
			(sw_mon_entries->mon_dst_paddr -
			 pmon->link_desc_banks[sw_cookie].paddr);

		ath11k_hal_rx_msdu_list_get(ar, rx_msdu_link_desc, &msdu_list,
					    &num_msdus);

		for (i = 0; i < num_msdus; i++) {
			buf_id = FIELD_GET(DP_RXDMA_BUF_COOKIE_BUF_ID,
					   msdu_list.sw_cookie[i]);

			spin_lock_bh(&rx_ring->idr_lock);
			msdu = idr_find(&rx_ring->bufs_idr, buf_id);
			if (!msdu) {
				ath11k_dbg(ar->ab, ATH11K_DBG_DATA,
					   "full mon msdu_pop: invalid buf_id %d\n",
					    buf_id);
				spin_unlock_bh(&rx_ring->idr_lock);
				break;
			}
			idr_remove(&rx_ring->bufs_idr, buf_id);
			spin_unlock_bh(&rx_ring->idr_lock);

			rxcb = ATH11K_SKB_RXCB(msdu);
			if (!rxcb->unmapped) {
				dma_unmap_single(ar->ab->dev, rxcb->paddr,
						 msdu->len +
						 skb_tailroom(msdu),
						 DMA_FROM_DEVICE);
				rxcb->unmapped = 1;
			}
			if (drop_mpdu) {
				ath11k_dbg(ar->ab, ATH11K_DBG_DATA,
					   "full mon: i %d drop msdu %p *ppdu_id %x\n",
					   i, msdu, sw_mon_entries->ppdu_id);
				dev_kfree_skb_any(msdu);
				msdu_cnt--;
				goto next_msdu;
			}

			rx_desc = (struct hal_rx_desc *)msdu->data;

			rx_pkt_offset = sizeof(struct hal_rx_desc);
			l2_hdr_offset = ath11k_dp_rx_h_msdu_end_l3pad(ar->ab, rx_desc);

			if (is_first_msdu) {
				if (!ath11k_dp_rxdesc_mpdu_valid(ar->ab, rx_desc)) {
					drop_mpdu = true;
					dev_kfree_skb_any(msdu);
					msdu = NULL;
					goto next_msdu;
				}
				is_first_msdu = false;
			}

			ath11k_dp_mon_get_buf_len(&msdu_list.msdu_info[i],
						  &is_frag, &total_len,
						  &frag_len, &msdu_cnt);

			rx_buf_size = rx_pkt_offset + l2_hdr_offset + frag_len;

			ath11k_dp_pkt_set_pktlen(msdu, rx_buf_size);

			if (!(*head_msdu))
				*head_msdu = msdu;
			else if (last)
				last->next = msdu;

			last = msdu;
next_msdu:
			rx_bufs_used++;
		}

		ath11k_dp_rx_mon_next_link_desc_get(rx_msdu_link_desc,
						    &sw_mon_entries->mon_dst_paddr,
						    &sw_mon_entries->mon_dst_sw_cookie,
						    &rbm,
						    &p_buf_addr_info);

		if (ath11k_dp_rx_monitor_link_desc_return(ar,
							  p_last_buf_addr_info,
							  dp->mac_id))
			ath11k_dbg(ar->ab, ATH11K_DBG_DATA,
				   "full mon: dp_rx_monitor_link_desc_return failed\n");

		p_last_buf_addr_info = p_buf_addr_info;

	} while (sw_mon_entries->mon_dst_paddr && msdu_cnt);

	if (last)
		last->next = NULL;

	*tail_msdu = msdu;

	return rx_bufs_used;
}

static int ath11k_dp_rx_full_mon_prepare_mpdu(struct ath11k_dp *dp,
					      struct dp_full_mon_mpdu *mon_mpdu,
					      struct sk_buff *head,
					      struct sk_buff *tail)
{
	mon_mpdu = kzalloc(sizeof(*mon_mpdu), GFP_ATOMIC);
	if (!mon_mpdu)
		return -ENOMEM;

	list_add_tail(&mon_mpdu->list, &dp->dp_full_mon_mpdu_list);
	mon_mpdu->head = head;
	mon_mpdu->tail = tail;

	return 0;
}

static void ath11k_dp_rx_full_mon_drop_ppdu(struct ath11k_dp *dp,
					    struct dp_full_mon_mpdu *mon_mpdu)
{
	struct dp_full_mon_mpdu *tmp;
	struct sk_buff *tmp_msdu, *skb_next;

	if (list_empty(&dp->dp_full_mon_mpdu_list))
		return;

	list_for_each_entry_safe(mon_mpdu, tmp, &dp->dp_full_mon_mpdu_list, list) {
		list_del(&mon_mpdu->list);

		tmp_msdu = mon_mpdu->head;
		while (tmp_msdu) {
			skb_next = tmp_msdu->next;
			dev_kfree_skb_any(tmp_msdu);
			tmp_msdu = skb_next;
		}

		kfree(mon_mpdu);
	}
}

static int ath11k_dp_rx_full_mon_deliver_ppdu(struct ath11k *ar,
					      int mac_id,
					      struct ath11k_mon_data *pmon,
					      struct napi_struct *napi)
{
	struct ath11k_pdev_mon_stats *rx_mon_stats;
	struct dp_full_mon_mpdu *tmp;
	struct dp_full_mon_mpdu *mon_mpdu = pmon->mon_mpdu;
	struct sk_buff *head_msdu, *tail_msdu;
	struct ath11k_base *ab = ar->ab;
	struct ath11k_dp *dp = &ab->dp;
	int ret;

	rx_mon_stats = &pmon->rx_mon_stats;

	list_for_each_entry_safe(mon_mpdu, tmp, &dp->dp_full_mon_mpdu_list, list) {
		list_del(&mon_mpdu->list);
		head_msdu = mon_mpdu->head;
		tail_msdu = mon_mpdu->tail;
		if (head_msdu && tail_msdu) {
			ret = ath11k_dp_rx_mon_deliver(ar, mac_id, head_msdu,
						       &pmon->mon_ppdu_info,
						       tail_msdu, napi);
			rx_mon_stats->dest_mpdu_done++;
			ath11k_dbg(ar->ab, ATH11K_DBG_DATA, "full mon: deliver ppdu\n");
		}
		kfree(mon_mpdu);
	}

	return ret;
}

static int
ath11k_dp_rx_process_full_mon_status_ring(struct ath11k_base *ab, int mac_id,
					  struct napi_struct *napi, int budget)
{
	struct ath11k *ar = ab->pdevs[mac_id].ar;
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_mon_data *pmon = &dp->mon_data;
	struct hal_sw_mon_ring_entries *sw_mon_entries;
	int quota = 0, work = 0, count;

	sw_mon_entries = &pmon->sw_mon_entries;

	while (pmon->hold_mon_dst_ring) {
		quota = ath11k_dp_rx_process_mon_status(ab, mac_id,
							napi, 1);
		if (pmon->buf_state == DP_MON_STATUS_MATCH) {
			count = sw_mon_entries->status_buf_count;
			if (count > 1) {
				quota += ath11k_dp_rx_process_mon_status(ab, mac_id,
									 napi, count);
			}

			ath11k_dp_rx_full_mon_deliver_ppdu(ar, dp->mac_id,
							   pmon, napi);
			pmon->hold_mon_dst_ring = false;
		} else if (!pmon->mon_status_paddr ||
			   pmon->buf_state == DP_MON_STATUS_LEAD) {
			sw_mon_entries->drop_ppdu = true;
			pmon->hold_mon_dst_ring = false;
		}

		if (!quota)
			break;

		work += quota;
	}

	if (sw_mon_entries->drop_ppdu)
		ath11k_dp_rx_full_mon_drop_ppdu(&ab->dp, pmon->mon_mpdu);

	return work;
}

static int ath11k_dp_full_mon_process_rx(struct ath11k_base *ab, int mac_id,
					 struct napi_struct *napi, int budget)
{
	struct ath11k *ar = ab->pdevs[mac_id].ar;
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_mon_data *pmon = &dp->mon_data;
	struct hal_sw_mon_ring_entries *sw_mon_entries;
	struct ath11k_pdev_mon_stats *rx_mon_stats;
	struct sk_buff *head_msdu, *tail_msdu;
	void *mon_dst_srng = &ar->ab->hal.srng_list[dp->rxdma_mon_dst_ring.ring_id];
	void *ring_entry;
	u32 rx_bufs_used = 0, mpdu_rx_bufs_used;
	int quota = 0, ret;
	bool break_dst_ring = false;

	spin_lock_bh(&pmon->mon_lock);

	sw_mon_entries = &pmon->sw_mon_entries;
	rx_mon_stats = &pmon->rx_mon_stats;

	if (pmon->hold_mon_dst_ring) {
		spin_unlock_bh(&pmon->mon_lock);
		goto reap_status_ring;
	}

	ath11k_hal_srng_access_begin(ar->ab, mon_dst_srng);
	while ((ring_entry = ath11k_hal_srng_dst_peek(ar->ab, mon_dst_srng))) {
		head_msdu = NULL;
		tail_msdu = NULL;

		mpdu_rx_bufs_used = ath11k_dp_rx_full_mon_mpdu_pop(ar, ring_entry,
								   &head_msdu,
								   &tail_msdu,
								   sw_mon_entries);
		rx_bufs_used += mpdu_rx_bufs_used;

		if (!sw_mon_entries->end_of_ppdu) {
			if (head_msdu) {
				ret = ath11k_dp_rx_full_mon_prepare_mpdu(&ab->dp,
									 pmon->mon_mpdu,
									 head_msdu,
									 tail_msdu);
				if (ret)
					break_dst_ring = true;
			}

			goto next_entry;
		} else {
			if (!sw_mon_entries->ppdu_id &&
			    !sw_mon_entries->mon_status_paddr) {
				break_dst_ring = true;
				goto next_entry;
			}
		}

		rx_mon_stats->dest_ppdu_done++;
		pmon->mon_ppdu_status = DP_PPDU_STATUS_START;
		pmon->buf_state = DP_MON_STATUS_LAG;
		pmon->mon_status_paddr = sw_mon_entries->mon_status_paddr;
		pmon->hold_mon_dst_ring = true;
next_entry:
		ring_entry = ath11k_hal_srng_dst_get_next_entry(ar->ab,
								mon_dst_srng);
		if (break_dst_ring)
			break;
	}

	ath11k_hal_srng_access_end(ar->ab, mon_dst_srng);
	spin_unlock_bh(&pmon->mon_lock);

	if (rx_bufs_used) {
		ath11k_dp_rxbufs_replenish(ar->ab, dp->mac_id,
					   &dp->rxdma_mon_buf_ring,
					   rx_bufs_used,
					   HAL_RX_BUF_RBM_SW3_BM);
	}

reap_status_ring:
	quota = ath11k_dp_rx_process_full_mon_status_ring(ab, mac_id,
							  napi, budget);

	return quota;
}

int ath11k_dp_rx_process_mon_rings(struct ath11k_base *ab, int mac_id,
				   struct napi_struct *napi, int budget)
{
	struct ath11k *ar = ath11k_ab_to_ar(ab, mac_id);
	int ret = 0;

	if (test_bit(ATH11K_FLAG_MONITOR_STARTED, &ar->monitor_flags) &&
	    ab->hw_params.full_monitor_mode)
		ret = ath11k_dp_full_mon_process_rx(ab, mac_id, napi, budget);
	else
		ret = ath11k_dp_rx_process_mon_status(ab, mac_id, napi, budget);

	return ret;
}

static int ath11k_dp_rx_pdev_mon_status_attach(struct ath11k *ar)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_mon_data *pmon = (struct ath11k_mon_data *)&dp->mon_data;

	skb_queue_head_init(&pmon->rx_status_q);

	pmon->mon_ppdu_status = DP_PPDU_STATUS_START;

	memset(&pmon->rx_mon_stats, 0,
	       sizeof(pmon->rx_mon_stats));
	return 0;
}

int ath11k_dp_rx_pdev_mon_attach(struct ath11k *ar)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_mon_data *pmon = &dp->mon_data;
	struct hal_srng *mon_desc_srng = NULL;
	struct dp_srng *dp_srng;
	int ret = 0;
	u32 n_link_desc = 0;

	ret = ath11k_dp_rx_pdev_mon_status_attach(ar);
	if (ret) {
		ath11k_warn(ar->ab, "pdev_mon_status_attach() failed");
		return ret;
	}

	/* if rxdma1_enable is false, no need to setup
	 * rxdma_mon_desc_ring.
	 */
	if (!ar->ab->hw_params.rxdma1_enable)
		return 0;

	dp_srng = &dp->rxdma_mon_desc_ring;
	n_link_desc = dp_srng->size /
		ath11k_hal_srng_get_entrysize(ar->ab, HAL_RXDMA_MONITOR_DESC);
	mon_desc_srng =
		&ar->ab->hal.srng_list[dp->rxdma_mon_desc_ring.ring_id];

	ret = ath11k_dp_link_desc_setup(ar->ab, pmon->link_desc_banks,
					HAL_RXDMA_MONITOR_DESC, mon_desc_srng,
					n_link_desc);
	if (ret) {
		ath11k_warn(ar->ab, "mon_link_desc_pool_setup() failed");
		return ret;
	}
	pmon->mon_last_linkdesc_paddr = 0;
	pmon->mon_last_buf_cookie = DP_RX_DESC_COOKIE_MAX + 1;
	spin_lock_init(&pmon->mon_lock);

	return 0;
}

static int ath11k_dp_mon_link_free(struct ath11k *ar)
{
	struct ath11k_pdev_dp *dp = &ar->dp;
	struct ath11k_mon_data *pmon = &dp->mon_data;

	ath11k_dp_link_desc_cleanup(ar->ab, pmon->link_desc_banks,
				    HAL_RXDMA_MONITOR_DESC,
				    &dp->rxdma_mon_desc_ring);
	return 0;
}

int ath11k_dp_rx_pdev_mon_detach(struct ath11k *ar)
{
	ath11k_dp_mon_link_free(ar);
	return 0;
}

int ath11k_dp_rx_pktlog_start(struct ath11k_base *ab)
{
	/* start reap timer */
	mod_timer(&ab->mon_reap_timer,
		  jiffies + msecs_to_jiffies(ATH11K_MON_TIMER_INTERVAL));

	return 0;
}

int ath11k_dp_rx_pktlog_stop(struct ath11k_base *ab, bool stop_timer)
{
	int ret;

	if (stop_timer)
		del_timer_sync(&ab->mon_reap_timer);

	/* reap all the monitor related rings */
	ret = ath11k_dp_purge_mon_ring(ab);
	if (ret) {
		ath11k_warn(ab, "failed to purge dp mon ring: %d\n", ret);
		return ret;
	}

	return 0;
}