android_kernel_samsung_sm8650-modules/dp/wifi3.0/dp_peer.c

/*
 * Copyright (c) 2016-2018 The Linux Foundation. All rights reserved.
 *
 * Permission to use, copy, modify, and/or distribute this software for
 * any purpose with or without fee is hereby granted, provided that the
 * above copyright notice and this permission notice appear in all
 * copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#include <qdf_types.h>
#include <qdf_lock.h>
#include "dp_htt.h"
#include "dp_types.h"
#include "dp_internal.h"
#include "dp_peer.h"
#include <hal_api.h>
#include <hal_reo.h>
#ifdef CONFIG_MCL
#include <cds_ieee80211_common.h>
#include <cds_api.h>
#endif
#include <cdp_txrx_handle.h>
#include <wlan_cfg.h>

#ifdef DP_LFR
static inline void
dp_set_ssn_valid_flag(struct hal_reo_cmd_params *params,
					uint8_t valid)
{
	params->u.upd_queue_params.update_svld = 1;
	params->u.upd_queue_params.svld = valid;
	QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_DEBUG,
		"%s: Setting SSN valid bit to %d\n",
				__func__, valid);
}
#else
static inline void
dp_set_ssn_valid_flag(struct hal_reo_cmd_params *params,
					uint8_t valid) {};
#endif

static inline int dp_peer_find_mac_addr_cmp(
	union dp_align_mac_addr *mac_addr1,
	union dp_align_mac_addr *mac_addr2)
{
	return !((mac_addr1->align4.bytes_abcd == mac_addr2->align4.bytes_abcd)
		/*
		 * Intentionally use & rather than &&.
		 * because the operands are binary rather than generic boolean,
		 * the functionality is equivalent.
		 * Using && has the advantage of short-circuited evaluation,
		 * but using & has the advantage of no conditional branching,
		 * which is a more significant benefit.
		 */
		&
		(mac_addr1->align4.bytes_ef == mac_addr2->align4.bytes_ef));
}

static int dp_peer_find_map_attach(struct dp_soc *soc)
{
	uint32_t max_peers, peer_map_size;

	/* allocate the peer ID -> peer object map */
	max_peers = wlan_cfg_max_peer_id(soc->wlan_cfg_ctx) + 1;
	soc->max_peers = max_peers;
	QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_INFO,
		"\n<=== cfg max peer id %d ====>\n", max_peers);
	peer_map_size = max_peers * sizeof(soc->peer_id_to_obj_map[0]);
	soc->peer_id_to_obj_map = qdf_mem_malloc(peer_map_size);
	if (!soc->peer_id_to_obj_map) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			"%s: peer map memory allocation failed\n", __func__);
		return QDF_STATUS_E_NOMEM;
	}

	/*
	 * The peer_id_to_obj_map doesn't really need to be initialized,
	 * since elements are only used after they have been individually
	 * initialized.
	 * However, it is convenient for debugging to have all elements
	 * that are not in use set to 0.
	 */
	qdf_mem_zero(soc->peer_id_to_obj_map, peer_map_size);
	return 0; /* success */
}

static int dp_log2_ceil(unsigned value)
{
	unsigned tmp = value;
	int log2 = -1;

	while (tmp) {
		log2++;
		tmp >>= 1;
	}
	if (1 << log2 != value)
		log2++;
	return log2;
}

static int dp_peer_find_add_id_to_obj(
	struct dp_peer *peer,
	uint16_t peer_id)
{
	int i;

	for (i = 0; i < MAX_NUM_PEER_ID_PER_PEER; i++) {
		if (peer->peer_ids[i] == HTT_INVALID_PEER) {
			peer->peer_ids[i] = peer_id;
			return 0; /* success */
		}
	}
	return QDF_STATUS_E_FAILURE; /* failure */
}

#define DP_PEER_HASH_LOAD_MULT  2
#define DP_PEER_HASH_LOAD_SHIFT 0

#define DP_AST_HASH_LOAD_MULT  2
#define DP_AST_HASH_LOAD_SHIFT 0

static int dp_peer_find_hash_attach(struct dp_soc *soc)
{
	int i, hash_elems, log2;

	/* allocate the peer MAC address -> peer object hash table */
	hash_elems = wlan_cfg_max_peer_id(soc->wlan_cfg_ctx) + 1;
	hash_elems *= DP_PEER_HASH_LOAD_MULT;
	hash_elems >>= DP_PEER_HASH_LOAD_SHIFT;
	log2 = dp_log2_ceil(hash_elems);
	hash_elems = 1 << log2;

	soc->peer_hash.mask = hash_elems - 1;
	soc->peer_hash.idx_bits = log2;
	/* allocate an array of TAILQ peer object lists */
	soc->peer_hash.bins = qdf_mem_malloc(
		hash_elems * sizeof(TAILQ_HEAD(anonymous_tail_q, dp_peer)));
	if (!soc->peer_hash.bins)
		return QDF_STATUS_E_NOMEM;

	for (i = 0; i < hash_elems; i++)
		TAILQ_INIT(&soc->peer_hash.bins[i]);

	return 0;
}

static void dp_peer_find_hash_detach(struct dp_soc *soc)
{
	qdf_mem_free(soc->peer_hash.bins);
}

static inline unsigned dp_peer_find_hash_index(struct dp_soc *soc,
	union dp_align_mac_addr *mac_addr)
{
	unsigned index;

	index =
		mac_addr->align2.bytes_ab ^
		mac_addr->align2.bytes_cd ^
		mac_addr->align2.bytes_ef;
	index ^= index >> soc->peer_hash.idx_bits;
	index &= soc->peer_hash.mask;
	return index;
}


void dp_peer_find_hash_add(struct dp_soc *soc, struct dp_peer *peer)
{
	unsigned index;

	index = dp_peer_find_hash_index(soc, &peer->mac_addr);
	qdf_spin_lock_bh(&soc->peer_ref_mutex);
	/*
	 * It is important to add the new peer at the tail of the peer list
	 * with the bin index.  Together with having the hash_find function
	 * search from head to tail, this ensures that if two entries with
	 * the same MAC address are stored, the one added first will be
	 * found first.
	 */
	TAILQ_INSERT_TAIL(&soc->peer_hash.bins[index], peer, hash_list_elem);
	qdf_spin_unlock_bh(&soc->peer_ref_mutex);
}

#ifdef FEATURE_WDS
/*
 * dp_peer_ast_hash_attach() - Allocate and initialize AST Hash Table
 * @soc: SoC handle
 *
 * Return: None
 */
static int dp_peer_ast_hash_attach(struct dp_soc *soc)
{
	int i, hash_elems, log2;

	hash_elems = ((WLAN_UMAC_PSOC_MAX_PEERS * DP_AST_HASH_LOAD_MULT) >>
		DP_AST_HASH_LOAD_SHIFT);

	log2 = dp_log2_ceil(hash_elems);
	hash_elems = 1 << log2;

	soc->ast_hash.mask = hash_elems - 1;
	soc->ast_hash.idx_bits = log2;

	/* allocate an array of TAILQ peer object lists */
	soc->ast_hash.bins = qdf_mem_malloc(
		hash_elems * sizeof(TAILQ_HEAD(anonymous_tail_q,
				dp_ast_entry)));

	if (!soc->ast_hash.bins)
		return QDF_STATUS_E_NOMEM;

	for (i = 0; i < hash_elems; i++)
		TAILQ_INIT(&soc->ast_hash.bins[i]);

	return 0;
}

/*
 * dp_peer_ast_hash_detach() - Free AST Hash table
 * @soc: SoC handle
 *
 * Return: None
 */
static void dp_peer_ast_hash_detach(struct dp_soc *soc)
{
	qdf_mem_free(soc->ast_hash.bins);
}

/*
 * dp_peer_ast_hash_index() - Compute the AST hash from MAC address
 * @soc: SoC handle
 *
 * Return: AST hash
 */
static inline uint32_t dp_peer_ast_hash_index(struct dp_soc *soc,
	union dp_align_mac_addr *mac_addr)
{
	uint32_t index;

	index =
		mac_addr->align2.bytes_ab ^
		mac_addr->align2.bytes_cd ^
		mac_addr->align2.bytes_ef;
	index ^= index >> soc->ast_hash.idx_bits;
	index &= soc->ast_hash.mask;
	return index;
}

/*
 * dp_peer_ast_hash_add() - Add AST entry into hash table
 * @soc: SoC handle
 *
 * This function adds the AST entry into SoC AST hash table
 * It assumes caller has taken the ast lock to protect the access to this table
 *
 * Return: None
 */
static inline void dp_peer_ast_hash_add(struct dp_soc *soc,
		struct dp_ast_entry *ase)
{
	uint32_t index;

	index = dp_peer_ast_hash_index(soc, &ase->mac_addr);
	TAILQ_INSERT_TAIL(&soc->ast_hash.bins[index], ase, hash_list_elem);
}

/*
 * dp_peer_ast_hash_remove() - Look up and remove AST entry from hash table
 * @soc: SoC handle
 *
 * This function removes the AST entry from soc AST hash table
 * It assumes caller has taken the ast lock to protect the access to this table
 *
 * Return: None
 */
static inline void dp_peer_ast_hash_remove(struct dp_soc *soc,
		struct dp_ast_entry *ase)
{
	unsigned index;
	struct dp_ast_entry *tmpase;
	int found = 0;

	index = dp_peer_ast_hash_index(soc, &ase->mac_addr);
	/* Check if tail is not empty before delete*/
	QDF_ASSERT(!TAILQ_EMPTY(&soc->ast_hash.bins[index]));

	TAILQ_FOREACH(tmpase, &soc->ast_hash.bins[index], hash_list_elem) {
		if (tmpase == ase) {
			found = 1;
			break;
		}
	}

	QDF_ASSERT(found);
	TAILQ_REMOVE(&soc->ast_hash.bins[index], ase, hash_list_elem);
}

/*
 * dp_peer_ast_hash_find() - Find AST entry by MAC address
 * @soc: SoC handle
 *
 * It assumes caller has taken the ast lock to protect the access to
 * AST hash table
 *
 * Return: AST entry
 */
struct dp_ast_entry *dp_peer_ast_hash_find(struct dp_soc *soc,
						uint8_t *ast_mac_addr)
{
	union dp_align_mac_addr local_mac_addr_aligned, *mac_addr;
	unsigned index;
	struct dp_ast_entry *ase;

	qdf_mem_copy(&local_mac_addr_aligned.raw[0],
			ast_mac_addr, DP_MAC_ADDR_LEN);
	mac_addr = &local_mac_addr_aligned;

	index = dp_peer_ast_hash_index(soc, mac_addr);
	TAILQ_FOREACH(ase, &soc->ast_hash.bins[index], hash_list_elem) {
		if (dp_peer_find_mac_addr_cmp(mac_addr, &ase->mac_addr) == 0) {
			return ase;
		}
	}

	return NULL;
}

/*
 * dp_peer_map_ast() - Map the ast entry with HW AST Index
 * @soc: SoC handle
 * @peer: peer to which ast node belongs
 * @mac_addr: MAC address of ast node
 * @hw_peer_id: HW AST Index returned by target in peer map event
 * @vdev_id: vdev id for VAP to which the peer belongs to
 *
 * Return: None
 */
static inline void dp_peer_map_ast(struct dp_soc *soc,
	struct dp_peer *peer, uint8_t *mac_addr, uint16_t hw_peer_id,
	uint8_t vdev_id)
{
	struct dp_ast_entry *ast_entry;
	enum cdp_txrx_ast_entry_type peer_type = CDP_TXRX_AST_TYPE_STATIC;
	bool ast_entry_found = FALSE;

	if (!peer) {
		return;
	}

	QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
		"%s: peer %pK ID %d vid %d mac %02x:%02x:%02x:%02x:%02x:%02x\n",
		__func__, peer, hw_peer_id, vdev_id, mac_addr[0],
		mac_addr[1], mac_addr[2], mac_addr[3],
		mac_addr[4], mac_addr[5]);

	qdf_spin_lock_bh(&soc->ast_lock);
	TAILQ_FOREACH(ast_entry, &peer->ast_entry_list, ase_list_elem) {
		if (!(qdf_mem_cmp(mac_addr, ast_entry->mac_addr.raw,
				DP_MAC_ADDR_LEN))) {
			ast_entry->ast_idx = hw_peer_id;
			soc->ast_table[hw_peer_id] = ast_entry;
			ast_entry->is_active = TRUE;
			peer_type = ast_entry->type;
			ast_entry_found = TRUE;
		}
	}

	if (ast_entry_found || (peer->vdev && peer->vdev->proxysta_vdev)) {
		if (soc->cdp_soc.ol_ops->peer_map_event) {
			soc->cdp_soc.ol_ops->peer_map_event(
			soc->ctrl_psoc, peer->peer_ids[0],
			hw_peer_id, vdev_id,
			mac_addr, peer_type);
		}
	} else {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			"AST entry not found\n");
	}

	qdf_spin_unlock_bh(&soc->ast_lock);
	return;
}

/*
 * dp_peer_add_ast() - Allocate and add AST entry into peer list
 * @soc: SoC handle
 * @peer: peer to which ast node belongs
 * @mac_addr: MAC address of ast node
 * @is_self: Is this base AST entry with peer mac address
 *
 * This API is used by WDS source port learning funtion to
 * add a new AST entry into peer AST list
 *
 * Return: 0 if new entry is allocated,
 *        -1 if entry add failed
 */
int dp_peer_add_ast(struct dp_soc *soc,
			struct dp_peer *peer,
			uint8_t *mac_addr,
			enum cdp_txrx_ast_entry_type type,
			uint32_t flags)
{
	struct dp_ast_entry *ast_entry;
	struct dp_vdev *vdev = peer->vdev;
	uint8_t next_node_mac[6];
	int  ret = -1;

	if (!vdev) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			FL("Peers vdev is NULL"));
		QDF_ASSERT(0);
		return ret;
	}

	QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
		"%s: peer %pK mac %02x:%02x:%02x:%02x:%02x:%02x\n",
		__func__, peer, mac_addr[0], mac_addr[1], mac_addr[2],
		mac_addr[3], mac_addr[4], mac_addr[5]);

	qdf_spin_lock_bh(&soc->ast_lock);

	/* If AST entry already exists , just return from here */
	ast_entry = dp_peer_ast_hash_find(soc, mac_addr);

	if (ast_entry) {
		if (ast_entry->type == CDP_TXRX_AST_TYPE_MEC)
			ast_entry->is_active = TRUE;

		qdf_spin_unlock_bh(&soc->ast_lock);
		return 0;
	}

	ast_entry = (struct dp_ast_entry *)
			qdf_mem_malloc(sizeof(struct dp_ast_entry));

	if (!ast_entry) {
		qdf_spin_unlock_bh(&soc->ast_lock);
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			FL("fail to allocate ast_entry"));
		QDF_ASSERT(0);
		return ret;
	}

	qdf_mem_copy(&ast_entry->mac_addr.raw[0], mac_addr, DP_MAC_ADDR_LEN);
	ast_entry->peer = peer;
	ast_entry->pdev_id = vdev->pdev->pdev_id;
	ast_entry->vdev_id = vdev->vdev_id;

	switch (type) {
	case CDP_TXRX_AST_TYPE_STATIC:
		peer->self_ast_entry = ast_entry;
		ast_entry->type = CDP_TXRX_AST_TYPE_STATIC;
		break;
	case CDP_TXRX_AST_TYPE_WDS:
		ast_entry->next_hop = 1;
		ast_entry->type = CDP_TXRX_AST_TYPE_WDS;
		break;
	case CDP_TXRX_AST_TYPE_WDS_HM:
		ast_entry->next_hop = 1;
		ast_entry->type = CDP_TXRX_AST_TYPE_WDS_HM;
		break;
	case CDP_TXRX_AST_TYPE_MEC:
		ast_entry->next_hop = 1;
		ast_entry->type = CDP_TXRX_AST_TYPE_MEC;
		break;
	default:
		QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
			FL("Incorrect AST entry type"));
	}

	ast_entry->is_active = TRUE;
	TAILQ_INSERT_TAIL(&peer->ast_entry_list, ast_entry, ase_list_elem);
	DP_STATS_INC(soc, ast.added, 1);
	dp_peer_ast_hash_add(soc, ast_entry);
	qdf_spin_unlock_bh(&soc->ast_lock);

	if (ast_entry->type == CDP_TXRX_AST_TYPE_WDS)
		qdf_mem_copy(next_node_mac, peer->mac_addr.raw, 6);
	else
		qdf_mem_copy(next_node_mac, peer->vdev->mac_addr.raw, 6);

	if (ast_entry->type != CDP_TXRX_AST_TYPE_STATIC) {
		if (QDF_STATUS_SUCCESS ==
				soc->cdp_soc.ol_ops->peer_add_wds_entry(
				peer->vdev->osif_vdev,
				mac_addr,
				next_node_mac,
				flags))
			return 0;
	}

	return ret;
}

/*
 * dp_peer_del_ast() - Delete and free AST entry
 * @soc: SoC handle
 * @ast_entry: AST entry of the node
 *
 * This function removes the AST entry from peer and soc tables
 * It assumes caller has taken the ast lock to protect the access to these
 * tables
 *
 * Return: None
 */
void dp_peer_del_ast(struct dp_soc *soc, struct dp_ast_entry *ast_entry)
{
	struct dp_peer *peer = ast_entry->peer;

	if (ast_entry->next_hop)
		soc->cdp_soc.ol_ops->peer_del_wds_entry(peer->vdev->osif_vdev,
						ast_entry->mac_addr.raw);

	soc->ast_table[ast_entry->ast_idx] = NULL;
	TAILQ_REMOVE(&peer->ast_entry_list, ast_entry, ase_list_elem);
	DP_STATS_INC(soc, ast.deleted, 1);
	dp_peer_ast_hash_remove(soc, ast_entry);
	qdf_mem_free(ast_entry);
}

/*
 * dp_peer_update_ast() - Delete and free AST entry
 * @soc: SoC handle
 * @peer: peer to which ast node belongs
 * @ast_entry: AST entry of the node
 * @flags: wds or hmwds
 *
 * This function update the AST entry to the roamed peer and soc tables
 * It assumes caller has taken the ast lock to protect the access to these
 * tables
 *
 * Return: 0 if ast entry is updated successfully
 *         -1 failure
 */
int dp_peer_update_ast(struct dp_soc *soc, struct dp_peer *peer,
		       struct dp_ast_entry *ast_entry, uint32_t flags)
{
	int ret = -1;

	ast_entry->peer = peer;
	if (ast_entry->type != CDP_TXRX_AST_TYPE_STATIC) {
		if (QDF_STATUS_SUCCESS ==
				soc->cdp_soc.ol_ops->peer_update_wds_entry(
				peer->vdev->osif_vdev,
				ast_entry->mac_addr.raw,
				peer->mac_addr.raw,
				flags))
			return 0;
	}

	return ret;
}

/*
 * dp_peer_ast_get_pdev_id() - get pdev_id from the ast entry
 * @soc: SoC handle
 * @ast_entry: AST entry of the node
 *
 * This function gets the pdev_id from the ast entry.
 *
 * Return: (uint8_t) pdev_id
 */
uint8_t dp_peer_ast_get_pdev_id(struct dp_soc *soc,
				struct dp_ast_entry *ast_entry)
{
	return ast_entry->pdev_id;
}

/*
 * dp_peer_ast_get_next_hop() - get next_hop from the ast entry
 * @soc: SoC handle
 * @ast_entry: AST entry of the node
 *
 * This function gets the next hop from the ast entry.
 *
 * Return: (uint8_t) next_hop
 */
uint8_t dp_peer_ast_get_next_hop(struct dp_soc *soc,
				struct dp_ast_entry *ast_entry)
{
	return ast_entry->next_hop;
}

/*
 * dp_peer_ast_set_type() - set type from the ast entry
 * @soc: SoC handle
 * @ast_entry: AST entry of the node
 *
 * This function sets the type in the ast entry.
 *
 * Return:
 */
void dp_peer_ast_set_type(struct dp_soc *soc,
				struct dp_ast_entry *ast_entry,
				enum cdp_txrx_ast_entry_type type)
{
	ast_entry->type = type;
}

#else
int dp_peer_add_ast(struct dp_soc *soc, struct dp_peer *peer,
		uint8_t *mac_addr, enum cdp_txrx_ast_entry_type type,
		uint32_t flags)
{
	return 1;
}

void dp_peer_del_ast(struct dp_soc *soc, struct dp_ast_entry *ast_entry)
{
}

int dp_peer_update_ast(struct dp_soc *soc, struct dp_peer *peer,
			struct dp_ast_entry *ast_entry, uint32_t flags)
{
	return 1;
}

struct dp_ast_entry *dp_peer_ast_hash_find(struct dp_soc *soc,
						uint8_t *ast_mac_addr)
{
	return NULL;
}

static int dp_peer_ast_hash_attach(struct dp_soc *soc)
{
	return 0;
}

static inline void dp_peer_map_ast(struct dp_soc *soc,
	struct dp_peer *peer, uint8_t *mac_addr, uint16_t hw_peer_id,
	uint8_t vdev_id)
{
	return;
}

static void dp_peer_ast_hash_detach(struct dp_soc *soc)
{
}

void dp_peer_ast_set_type(struct dp_soc *soc,
				struct dp_ast_entry *ast_entry,
				enum cdp_txrx_ast_entry_type type)
{
}

uint8_t dp_peer_ast_get_pdev_id(struct dp_soc *soc,
				struct dp_ast_entry *ast_entry)
{
	return 0xff;
}


uint8_t dp_peer_ast_get_next_hop(struct dp_soc *soc,
				struct dp_ast_entry *ast_entry)
{
	return 0xff;
}
#endif

#if ATH_SUPPORT_WRAP
static struct dp_peer *dp_peer_find_hash_find(struct dp_soc *soc,
	uint8_t *peer_mac_addr, int mac_addr_is_aligned, uint8_t vdev_id)
#else
static struct dp_peer *dp_peer_find_hash_find(struct dp_soc *soc,
	uint8_t *peer_mac_addr, int mac_addr_is_aligned)
#endif
{
	union dp_align_mac_addr local_mac_addr_aligned, *mac_addr;
	unsigned index;
	struct dp_peer *peer;

	if (mac_addr_is_aligned) {
		mac_addr = (union dp_align_mac_addr *) peer_mac_addr;
	} else {
		qdf_mem_copy(
			&local_mac_addr_aligned.raw[0],
			peer_mac_addr, DP_MAC_ADDR_LEN);
		mac_addr = &local_mac_addr_aligned;
	}
	index = dp_peer_find_hash_index(soc, mac_addr);
	qdf_spin_lock_bh(&soc->peer_ref_mutex);
	TAILQ_FOREACH(peer, &soc->peer_hash.bins[index], hash_list_elem) {
#if ATH_SUPPORT_WRAP
		/* ProxySTA may have multiple BSS peer with same MAC address,
		 * modified find will take care of finding the correct BSS peer.
		 */
		if (dp_peer_find_mac_addr_cmp(mac_addr, &peer->mac_addr) == 0 &&
			(peer->vdev->vdev_id == vdev_id)) {
#else
		if (dp_peer_find_mac_addr_cmp(mac_addr, &peer->mac_addr) == 0) {
#endif
			/* found it - increment the ref count before releasing
			 * the lock
			 */
			qdf_atomic_inc(&peer->ref_cnt);
			qdf_spin_unlock_bh(&soc->peer_ref_mutex);
			return peer;
		}
	}
	qdf_spin_unlock_bh(&soc->peer_ref_mutex);
	return NULL; /* failure */
}

void dp_peer_find_hash_remove(struct dp_soc *soc, struct dp_peer *peer)
{
	unsigned index;
	struct dp_peer *tmppeer = NULL;
	int found = 0;

	index = dp_peer_find_hash_index(soc, &peer->mac_addr);
	/* Check if tail is not empty before delete*/
	QDF_ASSERT(!TAILQ_EMPTY(&soc->peer_hash.bins[index]));
	/*
	 * DO NOT take the peer_ref_mutex lock here - it needs to be taken
	 * by the caller.
	 * The caller needs to hold the lock from the time the peer object's
	 * reference count is decremented and tested up through the time the
	 * reference to the peer object is removed from the hash table, by
	 * this function.
	 * Holding the lock only while removing the peer object reference
	 * from the hash table keeps the hash table consistent, but does not
	 * protect against a new HL tx context starting to use the peer object
	 * if it looks up the peer object from its MAC address just after the
	 * peer ref count is decremented to zero, but just before the peer
	 * object reference is removed from the hash table.
	 */
	 TAILQ_FOREACH(tmppeer, &soc->peer_hash.bins[index], hash_list_elem) {
		if (tmppeer == peer) {
			found = 1;
			break;
		}
	}
	QDF_ASSERT(found);
	TAILQ_REMOVE(&soc->peer_hash.bins[index], peer, hash_list_elem);
}

void dp_peer_find_hash_erase(struct dp_soc *soc)
{
	int i;

	/*
	 * Not really necessary to take peer_ref_mutex lock - by this point,
	 * it's known that the soc is no longer in use.
	 */
	for (i = 0; i <= soc->peer_hash.mask; i++) {
		if (!TAILQ_EMPTY(&soc->peer_hash.bins[i])) {
			struct dp_peer *peer, *peer_next;

			/*
			 * TAILQ_FOREACH_SAFE must be used here to avoid any
			 * memory access violation after peer is freed
			 */
			TAILQ_FOREACH_SAFE(peer, &soc->peer_hash.bins[i],
				hash_list_elem, peer_next) {
				/*
				 * Don't remove the peer from the hash table -
				 * that would modify the list we are currently
				 * traversing, and it's not necessary anyway.
				 */
				/*
				 * Artificially adjust the peer's ref count to
				 * 1, so it will get deleted by
				 * dp_peer_unref_delete.
				 */
				/* set to zero */
				qdf_atomic_init(&peer->ref_cnt);
				/* incr to one */
				qdf_atomic_inc(&peer->ref_cnt);
				dp_peer_unref_delete(peer);
			}
		}
	}
}

static void dp_peer_find_map_detach(struct dp_soc *soc)
{
	qdf_mem_free(soc->peer_id_to_obj_map);
}

int dp_peer_find_attach(struct dp_soc *soc)
{
	if (dp_peer_find_map_attach(soc))
		return 1;

	if (dp_peer_find_hash_attach(soc)) {
		dp_peer_find_map_detach(soc);
		return 1;
	}

	if (dp_peer_ast_hash_attach(soc)) {
		dp_peer_find_hash_detach(soc);
		dp_peer_find_map_detach(soc);
		return 1;
	}
	return 0; /* success */
}

void dp_rx_tid_stats_cb(struct dp_soc *soc, void *cb_ctxt,
	union hal_reo_status *reo_status)
{
	struct dp_rx_tid *rx_tid = (struct dp_rx_tid *)cb_ctxt;
	struct hal_reo_queue_status *queue_status = &(reo_status->queue_status);

	if (queue_status->header.status != HAL_REO_CMD_SUCCESS) {
		DP_TRACE_STATS(FATAL, "REO stats failure %d for TID %d\n",
			queue_status->header.status, rx_tid->tid);
		return;
	}

	DP_TRACE_STATS(FATAL, "REO queue stats (TID: %d): \n"
		"ssn: %d\n"
		"curr_idx  : %d\n"
		"pn_31_0   : %08x\n"
		"pn_63_32  : %08x\n"
		"pn_95_64  : %08x\n"
		"pn_127_96 : %08x\n"
		"last_rx_enq_tstamp : %08x\n"
		"last_rx_deq_tstamp : %08x\n"
		"rx_bitmap_31_0     : %08x\n"
		"rx_bitmap_63_32    : %08x\n"
		"rx_bitmap_95_64    : %08x\n"
		"rx_bitmap_127_96   : %08x\n"
		"rx_bitmap_159_128  : %08x\n"
		"rx_bitmap_191_160  : %08x\n"
		"rx_bitmap_223_192  : %08x\n"
		"rx_bitmap_255_224  : %08x\n",
		rx_tid->tid,
		queue_status->ssn, queue_status->curr_idx,
		queue_status->pn_31_0, queue_status->pn_63_32,
		queue_status->pn_95_64, queue_status->pn_127_96,
		queue_status->last_rx_enq_tstamp,
		queue_status->last_rx_deq_tstamp,
		queue_status->rx_bitmap_31_0, queue_status->rx_bitmap_63_32,
		queue_status->rx_bitmap_95_64, queue_status->rx_bitmap_127_96,
		queue_status->rx_bitmap_159_128,
		queue_status->rx_bitmap_191_160,
		queue_status->rx_bitmap_223_192,
		queue_status->rx_bitmap_255_224);

	DP_TRACE_STATS(FATAL,
		"curr_mpdu_cnt      : %d\n"
		"curr_msdu_cnt      : %d\n"
		"fwd_timeout_cnt    : %d\n"
		"fwd_bar_cnt        : %d\n"
		"dup_cnt            : %d\n"
		"frms_in_order_cnt  : %d\n"
		"bar_rcvd_cnt       : %d\n"
		"mpdu_frms_cnt      : %d\n"
		"msdu_frms_cnt      : %d\n"
		"total_byte_cnt     : %d\n"
		"late_recv_mpdu_cnt : %d\n"
		"win_jump_2k 	    : %d\n"
		"hole_cnt 	    : %d\n",
		queue_status->curr_mpdu_cnt, queue_status->curr_msdu_cnt,
		queue_status->fwd_timeout_cnt, queue_status->fwd_bar_cnt,
		queue_status->dup_cnt, queue_status->frms_in_order_cnt,
		queue_status->bar_rcvd_cnt, queue_status->mpdu_frms_cnt,
		queue_status->msdu_frms_cnt, queue_status->total_cnt,
		queue_status->late_recv_mpdu_cnt, queue_status->win_jump_2k,
		queue_status->hole_cnt);

	DP_PRINT_STATS("Num of Addba Req = %d\n", rx_tid->num_of_addba_req);
	DP_PRINT_STATS("Num of Addba Resp = %d\n", rx_tid->num_of_addba_resp);
	DP_PRINT_STATS("Num of Delba Req = %d\n", rx_tid->num_of_delba_req);
	DP_PRINT_STATS("BA window size   = %d\n", rx_tid->ba_win_size);
	DP_PRINT_STATS("Pn size = %d\n", rx_tid->pn_size);
}

static inline struct dp_peer *dp_peer_find_add_id(struct dp_soc *soc,
	uint8_t *peer_mac_addr, uint16_t peer_id, uint16_t hw_peer_id,
	uint8_t vdev_id)
{
	struct dp_peer *peer;

	QDF_ASSERT(peer_id <= wlan_cfg_max_peer_id(soc->wlan_cfg_ctx) + 1);
	/* check if there's already a peer object with this MAC address */
#if ATH_SUPPORT_WRAP
	peer = dp_peer_find_hash_find(soc, peer_mac_addr,
		0 /* is aligned */, vdev_id);
#else
	peer = dp_peer_find_hash_find(soc, peer_mac_addr, 0 /* is aligned */);
#endif
	QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
		"%s: peer %pK ID %d vid %d mac %02x:%02x:%02x:%02x:%02x:%02x\n",
		__func__, peer, peer_id, vdev_id, peer_mac_addr[0],
		peer_mac_addr[1], peer_mac_addr[2], peer_mac_addr[3],
		peer_mac_addr[4], peer_mac_addr[5]);

	if (peer) {
		/* peer's ref count was already incremented by
		 * peer_find_hash_find
		 */
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			  "%s: ref_cnt: %d", __func__,
			   qdf_atomic_read(&peer->ref_cnt));
		soc->peer_id_to_obj_map[peer_id] = peer;

		if (dp_peer_find_add_id_to_obj(peer, peer_id)) {
			/* TBDXXX: assert for now */
			QDF_ASSERT(0);
		}

		return peer;
	}

	return NULL;
}

/**
 * dp_rx_peer_map_handler() - handle peer map event from firmware
 * @soc_handle - genereic soc handle
 * @peeri_id - peer_id from firmware
 * @hw_peer_id - ast index for this peer
 * vdev_id - vdev ID
 * peer_mac_addr - macc assress of the peer
 *
 * associate the peer_id that firmware provided with peer entry
 * and update the ast table in the host with the hw_peer_id.
 *
 * Return: none
 */

void
dp_rx_peer_map_handler(void *soc_handle, uint16_t peer_id, uint16_t hw_peer_id,
			uint8_t vdev_id, uint8_t *peer_mac_addr)
{
	struct dp_soc *soc = (struct dp_soc *)soc_handle;
	struct dp_peer *peer = NULL;

	QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_INFO_HIGH,
		"peer_map_event (soc:%pK): peer_id %di, hw_peer_id %d, peer_mac "
		"%02x:%02x:%02x:%02x:%02x:%02x, vdev_id %d\n", soc, peer_id,
		hw_peer_id, peer_mac_addr[0], peer_mac_addr[1],
		peer_mac_addr[2], peer_mac_addr[3], peer_mac_addr[4],
		peer_mac_addr[5], vdev_id);

	peer = soc->peer_id_to_obj_map[peer_id];

	if ((hw_peer_id < 0) || (hw_peer_id > (WLAN_UMAC_PSOC_MAX_PEERS * 2))) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			"invalid hw_peer_id: %d", hw_peer_id);
		qdf_assert_always(0);
	}

	/*
	 * check if peer already exists for this peer_id, if so
	 * this peer map event is in response for a wds peer add
	 * wmi command sent during wds source port learning.
	 * in this case just add the ast entry to the existing
	 * peer ast_list.
	 */
	if (!peer)
		peer = dp_peer_find_add_id(soc, peer_mac_addr, peer_id,
					hw_peer_id, vdev_id);

	dp_peer_map_ast(soc, peer, peer_mac_addr,
			hw_peer_id, vdev_id);
}

void
dp_rx_peer_unmap_handler(void *soc_handle, uint16_t peer_id)
{
	struct dp_peer *peer;
	struct dp_soc *soc = (struct dp_soc *)soc_handle;
	uint8_t i;
	peer = dp_peer_find_by_id(soc, peer_id);

	QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_INFO_HIGH,
		"peer_unmap_event (soc:%pK) peer_id %d peer %pK\n",
		soc, peer_id, peer);

	/*
	 * Currently peer IDs are assigned for vdevs as well as peers.
	 * If the peer ID is for a vdev, then the peer pointer stored
	 * in peer_id_to_obj_map will be NULL.
	 */
	if (!peer)
		return;

	soc->peer_id_to_obj_map[peer_id] = NULL;
	for (i = 0; i < MAX_NUM_PEER_ID_PER_PEER; i++) {
		if (peer->peer_ids[i] == peer_id) {
			peer->peer_ids[i] = HTT_INVALID_PEER;
			break;
		}
	}

	if (soc->cdp_soc.ol_ops->peer_unmap_event) {
		soc->cdp_soc.ol_ops->peer_unmap_event(soc->ctrl_psoc,
				peer_id);
	}

	/*
	 * Remove a reference to the peer.
	 * If there are no more references, delete the peer object.
	 */
	dp_peer_unref_delete(peer);
}

void
dp_peer_find_detach(struct dp_soc *soc)
{
	dp_peer_find_map_detach(soc);
	dp_peer_find_hash_detach(soc);
	dp_peer_ast_hash_detach(soc);
}

static void dp_rx_tid_update_cb(struct dp_soc *soc, void *cb_ctxt,
	union hal_reo_status *reo_status)
{
	struct dp_rx_tid *rx_tid = (struct dp_rx_tid *)cb_ctxt;

	if ((reo_status->rx_queue_status.header.status !=
		HAL_REO_CMD_SUCCESS) &&
		(reo_status->rx_queue_status.header.status !=
		HAL_REO_CMD_DRAIN)) {
		/* Should not happen normally. Just print error for now */
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			"%s: Rx tid HW desc update failed(%d): tid %d\n",
			__func__,
			reo_status->rx_queue_status.header.status,
			rx_tid->tid);
	}
}

/*
 * dp_find_peer_by_addr - find peer instance by mac address
 * @dev: physical device instance
 * @peer_mac_addr: peer mac address
 * @local_id: local id for the peer
 *
 * Return: peer instance pointer
 */
void *dp_find_peer_by_addr(struct cdp_pdev *dev, uint8_t *peer_mac_addr,
		uint8_t *local_id)
{
	struct dp_pdev *pdev = (struct dp_pdev *)dev;
	struct dp_peer *peer;

#if ATH_SUPPORT_WRAP
	peer = dp_peer_find_hash_find(pdev->soc, peer_mac_addr, 0, 0);
	/* WAR, VDEV ID? TEMP 0 */
#else
	peer = dp_peer_find_hash_find(pdev->soc, peer_mac_addr, 0);
#endif
	if (!peer)
		return NULL;

	/* Multiple peer ids? How can know peer id? */
	*local_id = peer->local_id;
	DP_TRACE(INFO, "%s: peer %pK id %d", __func__, peer, *local_id);

	/* ref_cnt is incremented inside dp_peer_find_hash_find().
	 * Decrement it here.
	 */
	qdf_atomic_dec(&peer->ref_cnt);

	return peer;
}

/*
 * dp_rx_tid_update_wifi3() – Update receive TID state
 * @peer: Datapath peer handle
 * @tid: TID
 * @ba_window_size: BlockAck window size
 * @start_seq: Starting sequence number
 *
 * Return: 0 on success, error code on failure
 */
static int dp_rx_tid_update_wifi3(struct dp_peer *peer, int tid, uint32_t
				  ba_window_size, uint32_t start_seq)
{
	struct dp_rx_tid *rx_tid = &peer->rx_tid[tid];
	struct dp_soc *soc = peer->vdev->pdev->soc;
	struct hal_reo_cmd_params params;

	qdf_mem_zero(&params, sizeof(params));

	params.std.need_status = 1;
	params.std.addr_lo = rx_tid->hw_qdesc_paddr & 0xffffffff;
	params.std.addr_hi = (uint64_t)(rx_tid->hw_qdesc_paddr) >> 32;
	params.u.upd_queue_params.update_ba_window_size = 1;
	params.u.upd_queue_params.ba_window_size = ba_window_size;

	if (start_seq < IEEE80211_SEQ_MAX) {
		params.u.upd_queue_params.update_ssn = 1;
		params.u.upd_queue_params.ssn = start_seq;
	}

	dp_set_ssn_valid_flag(&params, 0);

	dp_reo_send_cmd(soc, CMD_UPDATE_RX_REO_QUEUE, &params, dp_rx_tid_update_cb, rx_tid);
	return 0;
}

/*
 * dp_reo_desc_free() - Callback free reo descriptor memory after
 * HW cache flush
 *
 * @soc: DP SOC handle
 * @cb_ctxt: Callback context
 * @reo_status: REO command status
 */
static void dp_reo_desc_free(struct dp_soc *soc, void *cb_ctxt,
	union hal_reo_status *reo_status)
{
	struct reo_desc_list_node *freedesc =
		(struct reo_desc_list_node *)cb_ctxt;
	struct dp_rx_tid *rx_tid = &freedesc->rx_tid;

	if ((reo_status->fl_cache_status.header.status !=
		HAL_REO_CMD_SUCCESS) &&
		(reo_status->fl_cache_status.header.status !=
		HAL_REO_CMD_DRAIN)) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			"%s: Rx tid HW desc flush failed(%d): tid %d\n",
			__func__,
			reo_status->rx_queue_status.header.status,
			freedesc->rx_tid.tid);
	}
	QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_INFO,
		"%s: hw_qdesc_paddr: %pK, tid:%d\n", __func__,
		(void *)(rx_tid->hw_qdesc_paddr), rx_tid->tid);
	qdf_mem_unmap_nbytes_single(soc->osdev,
		rx_tid->hw_qdesc_paddr,
		QDF_DMA_BIDIRECTIONAL,
		rx_tid->hw_qdesc_alloc_size);
	qdf_mem_free(rx_tid->hw_qdesc_vaddr_unaligned);
	qdf_mem_free(freedesc);
}

#if defined(QCA_WIFI_QCA8074) && defined(BUILD_X86)
/* Hawkeye emulation requires bus address to be >= 0x50000000 */
static inline int dp_reo_desc_addr_chk(qdf_dma_addr_t dma_addr)
{
	if (dma_addr < 0x50000000)
		return QDF_STATUS_E_FAILURE;
	else
		return QDF_STATUS_SUCCESS;
}
#else
static inline int dp_reo_desc_addr_chk(qdf_dma_addr_t dma_addr)
{
	return QDF_STATUS_SUCCESS;
}
#endif


/*
 * dp_rx_tid_setup_wifi3() – Setup receive TID state
 * @peer: Datapath peer handle
 * @tid: TID
 * @ba_window_size: BlockAck window size
 * @start_seq: Starting sequence number
 *
 * Return: 0 on success, error code on failure
 */
int dp_rx_tid_setup_wifi3(struct dp_peer *peer, int tid,
	uint32_t ba_window_size, uint32_t start_seq)
{
	struct dp_rx_tid *rx_tid = &peer->rx_tid[tid];
	struct dp_vdev *vdev = peer->vdev;
	struct dp_soc *soc = vdev->pdev->soc;
	uint32_t hw_qdesc_size;
	uint32_t hw_qdesc_align;
	int hal_pn_type;
	void *hw_qdesc_vaddr;
	uint32_t alloc_tries = 0;

	if (peer->delete_in_progress)
		return QDF_STATUS_E_FAILURE;

	rx_tid->ba_win_size = ba_window_size;
	if (rx_tid->hw_qdesc_vaddr_unaligned != NULL)
		return dp_rx_tid_update_wifi3(peer, tid, ba_window_size,
			start_seq);
	rx_tid->num_of_addba_req = 0;
	rx_tid->num_of_delba_req = 0;
	rx_tid->num_of_addba_resp = 0;
#ifdef notyet
	hw_qdesc_size = hal_get_reo_qdesc_size(soc->hal_soc, ba_window_size);
#else
	/* TODO: Allocating HW queue descriptors based on max BA window size
	 * for all QOS TIDs so that same descriptor can be used later when
	 * ADDBA request is recevied. This should be changed to allocate HW
	 * queue descriptors based on BA window size being negotiated (0 for
	 * non BA cases), and reallocate when BA window size changes and also
	 * send WMI message to FW to change the REO queue descriptor in Rx
	 * peer entry as part of dp_rx_tid_update.
	 */
	if (tid != DP_NON_QOS_TID)
		hw_qdesc_size = hal_get_reo_qdesc_size(soc->hal_soc,
			HAL_RX_MAX_BA_WINDOW);
	else
		hw_qdesc_size = hal_get_reo_qdesc_size(soc->hal_soc,
			ba_window_size);
#endif

	hw_qdesc_align = hal_get_reo_qdesc_align(soc->hal_soc);
	/* To avoid unnecessary extra allocation for alignment, try allocating
	 * exact size and see if we already have aligned address.
	 */
	rx_tid->hw_qdesc_alloc_size = hw_qdesc_size;

try_desc_alloc:
	rx_tid->hw_qdesc_vaddr_unaligned =
		qdf_mem_malloc(rx_tid->hw_qdesc_alloc_size);

	if (!rx_tid->hw_qdesc_vaddr_unaligned) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			"%s: Rx tid HW desc alloc failed: tid %d\n",
			__func__, tid);
		return QDF_STATUS_E_NOMEM;
	}

	if ((unsigned long)(rx_tid->hw_qdesc_vaddr_unaligned) %
		hw_qdesc_align) {
		/* Address allocated above is not alinged. Allocate extra
		 * memory for alignment
		 */
		qdf_mem_free(rx_tid->hw_qdesc_vaddr_unaligned);
		rx_tid->hw_qdesc_vaddr_unaligned =
			qdf_mem_malloc(rx_tid->hw_qdesc_alloc_size +
					hw_qdesc_align - 1);

		if (!rx_tid->hw_qdesc_vaddr_unaligned) {
			QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
				"%s: Rx tid HW desc alloc failed: tid %d\n",
				__func__, tid);
			return QDF_STATUS_E_NOMEM;
		}

		hw_qdesc_vaddr = (void *)qdf_align((unsigned long)
			rx_tid->hw_qdesc_vaddr_unaligned,
			hw_qdesc_align);

		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_DEBUG,
			"%s: Total Size %d Aligned Addr %pK\n",
			__func__, rx_tid->hw_qdesc_alloc_size,
			hw_qdesc_vaddr);

	} else {
		hw_qdesc_vaddr = rx_tid->hw_qdesc_vaddr_unaligned;
	}

	/* TODO: Ensure that sec_type is set before ADDBA is received.
	 * Currently this is set based on htt indication
	 * HTT_T2H_MSG_TYPE_SEC_IND from target
	 */
	switch (peer->security[dp_sec_ucast].sec_type) {
	case cdp_sec_type_tkip_nomic:
	case cdp_sec_type_aes_ccmp:
	case cdp_sec_type_aes_ccmp_256:
	case cdp_sec_type_aes_gcmp:
	case cdp_sec_type_aes_gcmp_256:
		hal_pn_type = HAL_PN_WPA;
		break;
	case cdp_sec_type_wapi:
		if (vdev->opmode == wlan_op_mode_ap)
			hal_pn_type = HAL_PN_WAPI_EVEN;
		else
			hal_pn_type = HAL_PN_WAPI_UNEVEN;
		break;
	default:
		hal_pn_type = HAL_PN_NONE;
		break;
	}

	hal_reo_qdesc_setup(soc->hal_soc, tid, ba_window_size, start_seq,
		hw_qdesc_vaddr, rx_tid->hw_qdesc_paddr, hal_pn_type);

	qdf_mem_map_nbytes_single(soc->osdev, hw_qdesc_vaddr,
		QDF_DMA_BIDIRECTIONAL, rx_tid->hw_qdesc_alloc_size,
		&(rx_tid->hw_qdesc_paddr));

	if (dp_reo_desc_addr_chk(rx_tid->hw_qdesc_paddr) !=
			QDF_STATUS_SUCCESS) {
		if (alloc_tries++ < 10)
			goto try_desc_alloc;
		else {
			QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			"%s: Rx tid HW desc alloc failed (lowmem): tid %d\n",
			__func__, tid);
			return QDF_STATUS_E_NOMEM;
		}
	}

	if (soc->cdp_soc.ol_ops->peer_rx_reorder_queue_setup) {
		soc->cdp_soc.ol_ops->peer_rx_reorder_queue_setup(
			vdev->pdev->osif_pdev,
			peer->vdev->vdev_id, peer->mac_addr.raw,
			rx_tid->hw_qdesc_paddr, tid, tid);

	}
	return 0;
}

/*
 * dp_rx_tid_delete_cb() - Callback to flush reo descriptor HW cache
 * after deleting the entries (ie., setting valid=0)
 *
 * @soc: DP SOC handle
 * @cb_ctxt: Callback context
 * @reo_status: REO command status
 */
static void dp_rx_tid_delete_cb(struct dp_soc *soc, void *cb_ctxt,
	union hal_reo_status *reo_status)
{
	struct reo_desc_list_node *freedesc =
		(struct reo_desc_list_node *)cb_ctxt;
	uint32_t list_size;
	struct reo_desc_list_node *desc;
	unsigned long curr_ts = qdf_get_system_timestamp();
	uint32_t desc_size, tot_desc_size;
	struct hal_reo_cmd_params params;

	if (reo_status->rx_queue_status.header.status == HAL_REO_CMD_DRAIN) {
		qdf_mem_zero(reo_status, sizeof(*reo_status));
		reo_status->fl_cache_status.header.status = HAL_REO_CMD_DRAIN;
		dp_reo_desc_free(soc, (void *)freedesc, reo_status);
		return;
	} else if (reo_status->rx_queue_status.header.status !=
		HAL_REO_CMD_SUCCESS) {
		/* Should not happen normally. Just print error for now */
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			"%s: Rx tid HW desc deletion failed(%d): tid %d\n",
			__func__,
			reo_status->rx_queue_status.header.status,
			freedesc->rx_tid.tid);
	}

	QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_INFO_LOW,
		"%s: rx_tid: %d status: %d\n", __func__,
		freedesc->rx_tid.tid,
		reo_status->rx_queue_status.header.status);

	qdf_spin_lock_bh(&soc->reo_desc_freelist_lock);
	freedesc->free_ts = curr_ts;
	qdf_list_insert_back_size(&soc->reo_desc_freelist,
		(qdf_list_node_t *)freedesc, &list_size);

	while ((qdf_list_peek_front(&soc->reo_desc_freelist,
		(qdf_list_node_t **)&desc) == QDF_STATUS_SUCCESS) &&
		((list_size >= REO_DESC_FREELIST_SIZE) ||
		((curr_ts - desc->free_ts) > REO_DESC_FREE_DEFER_MS))) {
		struct dp_rx_tid *rx_tid;

		qdf_list_remove_front(&soc->reo_desc_freelist,
				(qdf_list_node_t **)&desc);
		list_size--;
		rx_tid = &desc->rx_tid;

		/* Flush and invalidate REO descriptor from HW cache: Base and
		 * extension descriptors should be flushed separately */
		tot_desc_size = hal_get_reo_qdesc_size(soc->hal_soc,
			rx_tid->ba_win_size);
		desc_size = hal_get_reo_qdesc_size(soc->hal_soc, 0);

		/* Flush reo extension descriptors */
		while ((tot_desc_size -= desc_size) > 0) {
			qdf_mem_zero(&params, sizeof(params));
			params.std.addr_lo =
				((uint64_t)(rx_tid->hw_qdesc_paddr) +
				tot_desc_size) & 0xffffffff;
			params.std.addr_hi =
				(uint64_t)(rx_tid->hw_qdesc_paddr) >> 32;

			if (QDF_STATUS_SUCCESS != dp_reo_send_cmd(soc,
							CMD_FLUSH_CACHE,
							&params,
							NULL,
							NULL)) {
				QDF_TRACE(QDF_MODULE_ID_DP,
					QDF_TRACE_LEVEL_ERROR,
					"%s: fail to send CMD_CACHE_FLUSH:"
					"tid %d desc %pK\n", __func__,
					rx_tid->tid,
					(void *)(rx_tid->hw_qdesc_paddr));
			}
		}

		/* Flush base descriptor */
		qdf_mem_zero(&params, sizeof(params));
		params.std.need_status = 1;
		params.std.addr_lo =
			(uint64_t)(rx_tid->hw_qdesc_paddr) & 0xffffffff;
		params.std.addr_hi = (uint64_t)(rx_tid->hw_qdesc_paddr) >> 32;

		if (QDF_STATUS_SUCCESS != dp_reo_send_cmd(soc,
							  CMD_FLUSH_CACHE,
							  &params,
							  dp_reo_desc_free,
							  (void *)desc)) {
			union hal_reo_status reo_status;
			/*
			 * If dp_reo_send_cmd return failure, related TID queue desc
			 * should be unmapped. Also locally reo_desc, together with
			 * TID queue desc also need to be freed accordingly.
			 *
			 * Here invoke desc_free function directly to do clean up.
			 */
			QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
				"%s: fail to send REO cmd to flush cache: tid %d\n",
				__func__, rx_tid->tid);
			qdf_mem_zero(&reo_status, sizeof(reo_status));
			reo_status.fl_cache_status.header.status = 0;
			dp_reo_desc_free(soc, (void *)desc, &reo_status);
		}
	}
	qdf_spin_unlock_bh(&soc->reo_desc_freelist_lock);
}

/*
 * dp_rx_tid_delete_wifi3() – Delete receive TID queue
 * @peer: Datapath peer handle
 * @tid: TID
 *
 * Return: 0 on success, error code on failure
 */
static int dp_rx_tid_delete_wifi3(struct dp_peer *peer, int tid)
{
	struct dp_rx_tid *rx_tid = &(peer->rx_tid[tid]);
	struct dp_soc *soc = peer->vdev->pdev->soc;
	struct hal_reo_cmd_params params;
	struct reo_desc_list_node *freedesc =
		qdf_mem_malloc(sizeof(*freedesc));

	if (!freedesc) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			"%s: malloc failed for freedesc: tid %d\n",
			__func__, tid);
		return -ENOMEM;
	}

	freedesc->rx_tid = *rx_tid;

	qdf_mem_zero(&params, sizeof(params));

	params.std.need_status = 0;
	params.std.addr_lo = rx_tid->hw_qdesc_paddr & 0xffffffff;
	params.std.addr_hi = (uint64_t)(rx_tid->hw_qdesc_paddr) >> 32;
	params.u.upd_queue_params.update_vld = 1;
	params.u.upd_queue_params.vld = 0;

	dp_reo_send_cmd(soc, CMD_UPDATE_RX_REO_QUEUE, &params,
		dp_rx_tid_delete_cb, (void *)freedesc);

	rx_tid->hw_qdesc_vaddr_unaligned = NULL;
	rx_tid->hw_qdesc_alloc_size = 0;
	rx_tid->hw_qdesc_paddr = 0;

	return 0;
}

#ifdef DP_LFR
static void dp_peer_setup_remaining_tids(struct dp_peer *peer)
{
	int tid;

	for (tid = 1; tid < DP_MAX_TIDS-1; tid++) {
		dp_rx_tid_setup_wifi3(peer, tid, 1, 0);
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_DEBUG,
			"Setting up TID %d for peer %pK peer->local_id %d\n",
			tid, peer, peer->local_id);
	}
}
#else
static void dp_peer_setup_remaining_tids(struct dp_peer *peer) {};
#endif
/*
 * dp_peer_rx_init() – Initialize receive TID state
 * @pdev: Datapath pdev
 * @peer: Datapath peer
 *
 */
void dp_peer_rx_init(struct dp_pdev *pdev, struct dp_peer *peer)
{
	int tid;
	struct dp_rx_tid *rx_tid;
	for (tid = 0; tid < DP_MAX_TIDS; tid++) {
		rx_tid = &peer->rx_tid[tid];
		rx_tid->array = &rx_tid->base;
		rx_tid->base.head = rx_tid->base.tail = NULL;
		rx_tid->tid = tid;
		rx_tid->defrag_timeout_ms = 0;
		rx_tid->ba_win_size = 0;
		rx_tid->ba_status = DP_RX_BA_INACTIVE;

		rx_tid->defrag_waitlist_elem.tqe_next = NULL;
		rx_tid->defrag_waitlist_elem.tqe_prev = NULL;

#ifdef notyet /* TODO: See if this is required for exception handling */
		/* invalid sequence number */
		peer->tids_last_seq[tid] = 0xffff;
#endif
	}

	/* Setup default (non-qos) rx tid queue */
	dp_rx_tid_setup_wifi3(peer, DP_NON_QOS_TID, 1, 0);

	/* Setup rx tid queue for TID 0.
	 * Other queues will be setup on receiving first packet, which will cause
	 * NULL REO queue error
	 */
	dp_rx_tid_setup_wifi3(peer, 0, 1, 0);

	/*
	 * Setup the rest of TID's to handle LFR
	 */
	dp_peer_setup_remaining_tids(peer);

	/*
	 * Set security defaults: no PN check, no security. The target may
	 * send a HTT SEC_IND message to overwrite these defaults.
	 */
	peer->security[dp_sec_ucast].sec_type =
		peer->security[dp_sec_mcast].sec_type = cdp_sec_type_none;
}

/*
 * dp_peer_rx_cleanup() – Cleanup receive TID state
 * @vdev: Datapath vdev
 * @peer: Datapath peer
 *
 */
void dp_peer_rx_cleanup(struct dp_vdev *vdev, struct dp_peer *peer)
{
	int tid;
	uint32_t tid_delete_mask = 0;
	for (tid = 0; tid < DP_MAX_TIDS; tid++) {
		if (peer->rx_tid[tid].hw_qdesc_vaddr_unaligned != NULL) {
			dp_rx_tid_delete_wifi3(peer, tid);
			tid_delete_mask |= (1 << tid);
		}
	}
#ifdef notyet /* See if FW can remove queues as part of peer cleanup */
	if (soc->ol_ops->peer_rx_reorder_queue_remove) {
		soc->ol_ops->peer_rx_reorder_queue_remove(vdev->pdev->osif_pdev,
			peer->vdev->vdev_id, peer->mac_addr.raw,
			tid_delete_mask);
	}
#endif
}

/*
 * dp_peer_cleanup() – Cleanup peer information
 * @vdev: Datapath vdev
 * @peer: Datapath peer
 *
 */
void dp_peer_cleanup(struct dp_vdev *vdev, struct dp_peer *peer)
{
	peer->last_assoc_rcvd = 0;
	peer->last_disassoc_rcvd = 0;
	peer->last_deauth_rcvd = 0;

	/* cleanup the Rx reorder queues for this peer */
	dp_peer_rx_cleanup(vdev, peer);
}

/*
* dp_rx_addba_requestprocess_wifi3() – Process ADDBA request from peer
*
* @peer: Datapath peer handle
* @dialogtoken: dialogtoken from ADDBA frame
* @tid: TID number
* @startseqnum: Start seq. number received in BA sequence control
* in ADDBA frame
*
* Return: 0 on success, error code on failure
*/
int dp_addba_requestprocess_wifi3(void *peer_handle,
	uint8_t dialogtoken, uint16_t tid, uint16_t batimeout,
	uint16_t buffersize, uint16_t startseqnum)
{
	struct dp_peer *peer = (struct dp_peer *)peer_handle;
	struct dp_rx_tid *rx_tid = &peer->rx_tid[tid];

	if ((rx_tid->ba_status == DP_RX_BA_ACTIVE) &&
			(rx_tid->hw_qdesc_vaddr_unaligned != NULL))
		rx_tid->ba_status = DP_RX_BA_INACTIVE;

	if (dp_rx_tid_setup_wifi3(peer, tid, buffersize,
		startseqnum)) {
		/* TODO: Should we send addba reject in this case */
		return QDF_STATUS_E_FAILURE;
	}

	if (rx_tid->userstatuscode != IEEE80211_STATUS_SUCCESS)
		rx_tid->statuscode = rx_tid->userstatuscode;
	else
		rx_tid->statuscode = IEEE80211_STATUS_SUCCESS;

	rx_tid->dialogtoken = dialogtoken;
	rx_tid->ba_status = DP_RX_BA_ACTIVE;
	rx_tid->num_of_addba_req++;

	return 0;
}

/*
* dp_rx_addba_responsesetup_wifi3() – Process ADDBA request from peer
*
* @peer: Datapath peer handle
* @tid: TID number
* @dialogtoken: output dialogtoken
* @statuscode: output dialogtoken
* @buffersize: Ouput BA window sizze
* @batimeout: Ouput BA timeout
*/
void dp_addba_responsesetup_wifi3(void *peer_handle, uint8_t tid,
	uint8_t *dialogtoken, uint16_t *statuscode,
	uint16_t *buffersize, uint16_t *batimeout)
{
	struct dp_peer *peer = (struct dp_peer *)peer_handle;
	struct dp_rx_tid *rx_tid = &peer->rx_tid[tid];

	rx_tid->num_of_addba_resp++;
	/* setup ADDBA response paramters */
	*dialogtoken = rx_tid->dialogtoken;
	*statuscode = rx_tid->statuscode;
	*buffersize = rx_tid->ba_win_size;
	*batimeout  = 0;
}

/*
* dp_set_addba_response() – Set a user defined ADDBA response status code
*
* @peer: Datapath peer handle
* @tid: TID number
* @statuscode: response status code to be set
*/
void dp_set_addba_response(void *peer_handle, uint8_t tid,
	uint16_t statuscode)
{
	struct dp_peer *peer = (struct dp_peer *)peer_handle;
	struct dp_rx_tid *rx_tid = &peer->rx_tid[tid];

	rx_tid->userstatuscode = statuscode;
}

/*
* dp_rx_delba_process_wifi3() – Process DELBA from peer
* @peer: Datapath peer handle
* @tid: TID number
* @reasoncode: Reason code received in DELBA frame
*
* Return: 0 on success, error code on failure
*/
int dp_delba_process_wifi3(void *peer_handle,
	int tid, uint16_t reasoncode)
{
	struct dp_peer *peer = (struct dp_peer *)peer_handle;
	struct dp_rx_tid *rx_tid = &peer->rx_tid[tid];

	if (rx_tid->ba_status != DP_RX_BA_ACTIVE)
		return QDF_STATUS_E_FAILURE;

	/* TODO: See if we can delete the existing REO queue descriptor and
	 * replace with a new one without queue extenstion descript to save
	 * memory
	 */
	rx_tid->num_of_delba_req++;
	dp_rx_tid_update_wifi3(peer, tid, 1, 0);

	rx_tid->ba_status = DP_RX_BA_INACTIVE;

	return 0;
}

void dp_rx_discard(struct dp_vdev *vdev, struct dp_peer *peer, unsigned tid,
	qdf_nbuf_t msdu_list)
{
	while (msdu_list) {
		qdf_nbuf_t msdu = msdu_list;

		msdu_list = qdf_nbuf_next(msdu_list);
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_INFO_HIGH,
			"discard rx %pK from partly-deleted peer %pK "
			"(%02x:%02x:%02x:%02x:%02x:%02x)\n",
			msdu, peer,
			peer->mac_addr.raw[0], peer->mac_addr.raw[1],
			peer->mac_addr.raw[2], peer->mac_addr.raw[3],
			peer->mac_addr.raw[4], peer->mac_addr.raw[5]);
		qdf_nbuf_free(msdu);
	}
}


/**
 * dp_set_pn_check_wifi3() - enable PN check in REO for security
 * @peer: Datapath peer handle
 * @vdev: Datapath vdev
 * @pdev - data path device instance
 * @sec_type - security type
 * @rx_pn - Receive pn starting number
 *
 */

void
dp_set_pn_check_wifi3(struct cdp_vdev *vdev_handle, struct cdp_peer *peer_handle, enum cdp_sec_type sec_type,  uint32_t *rx_pn)
{
	struct dp_peer *peer =  (struct dp_peer *)peer_handle;
	struct dp_vdev *vdev = (struct dp_vdev *)vdev_handle;
	struct dp_pdev *pdev;
	struct dp_soc *soc;
	int i;
	uint8_t pn_size;
	struct hal_reo_cmd_params params;

	/* preconditions */
	qdf_assert(vdev);

	pdev = vdev->pdev;
	soc = pdev->soc;


	qdf_mem_zero(&params, sizeof(params));

	params.std.need_status = 1;
	params.u.upd_queue_params.update_pn_valid = 1;
	params.u.upd_queue_params.update_pn_size = 1;
	params.u.upd_queue_params.update_pn = 1;
	params.u.upd_queue_params.update_pn_check_needed = 1;

	peer->security[dp_sec_ucast].sec_type = sec_type;

	switch (sec_type) {
	case cdp_sec_type_tkip_nomic:
	case cdp_sec_type_aes_ccmp:
	case cdp_sec_type_aes_ccmp_256:
	case cdp_sec_type_aes_gcmp:
	case cdp_sec_type_aes_gcmp_256:
		params.u.upd_queue_params.pn_check_needed = 1;
		params.u.upd_queue_params.pn_size = 48;
		pn_size = 48;
		break;
	case cdp_sec_type_wapi:
		params.u.upd_queue_params.pn_check_needed = 1;
		params.u.upd_queue_params.pn_size = 128;
		pn_size = 128;
		if (vdev->opmode == wlan_op_mode_ap) {
			params.u.upd_queue_params.pn_even = 1;
			params.u.upd_queue_params.update_pn_even = 1;
		} else {
			params.u.upd_queue_params.pn_uneven = 1;
			params.u.upd_queue_params.update_pn_uneven = 1;
		}
		break;
	default:
		params.u.upd_queue_params.pn_check_needed = 0;
		pn_size = 0;
		break;
	}


	for (i = 0; i < DP_MAX_TIDS; i++) {
		struct dp_rx_tid *rx_tid = &peer->rx_tid[i];
		if (rx_tid->hw_qdesc_vaddr_unaligned != NULL) {
			params.std.addr_lo =
				rx_tid->hw_qdesc_paddr & 0xffffffff;
			params.std.addr_hi =
				(uint64_t)(rx_tid->hw_qdesc_paddr) >> 32;

			if (sec_type != cdp_sec_type_wapi) {
				params.u.upd_queue_params.update_pn_valid = 0;
			} else {
				/*
				 * Setting PN valid bit for WAPI sec_type,
				 * since WAPI PN has to be started with
				 * predefined value
				 */
				params.u.upd_queue_params.update_pn_valid = 1;
				params.u.upd_queue_params.pn_31_0 = rx_pn[0];
				params.u.upd_queue_params.pn_63_32 = rx_pn[1];
				params.u.upd_queue_params.pn_95_64 = rx_pn[2];
				params.u.upd_queue_params.pn_127_96 = rx_pn[3];
			}
			rx_tid->pn_size = pn_size;
			dp_reo_send_cmd(soc, CMD_UPDATE_RX_REO_QUEUE, &params,
				dp_rx_tid_update_cb, rx_tid);
		} else {
			QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_INFO_HIGH,
				"PN Check not setup for TID :%d \n", i);
		}
	}
}


void
dp_rx_sec_ind_handler(void *soc_handle, uint16_t peer_id,
	enum htt_sec_type sec_type, int is_unicast, u_int32_t *michael_key,
	u_int32_t *rx_pn)
{
	struct dp_soc *soc = (struct dp_soc *)soc_handle;
	struct dp_peer *peer;
	int sec_index;

	peer = dp_peer_find_by_id(soc, peer_id);
	if (!peer) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
			"Couldn't find peer from ID %d - skipping security inits\n",
			peer_id);
		return;
	}
	QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_INFO_HIGH,
		"sec spec for peer %pK (%02x:%02x:%02x:%02x:%02x:%02x): "
		"%s key of type %d\n",
		peer,
		peer->mac_addr.raw[0], peer->mac_addr.raw[1],
		peer->mac_addr.raw[2], peer->mac_addr.raw[3],
		peer->mac_addr.raw[4], peer->mac_addr.raw[5],
		is_unicast ? "ucast" : "mcast",
		sec_type);
	sec_index = is_unicast ? dp_sec_ucast : dp_sec_mcast;
	peer->security[sec_index].sec_type = sec_type;
#ifdef notyet /* TODO: See if this is required for defrag support */
	/* michael key only valid for TKIP, but for simplicity,
	 * copy it anyway
	 */
	qdf_mem_copy(
		&peer->security[sec_index].michael_key[0],
		michael_key,
		sizeof(peer->security[sec_index].michael_key));
#ifdef BIG_ENDIAN_HOST
	OL_IF_SWAPBO(peer->security[sec_index].michael_key[0],
				 sizeof(peer->security[sec_index].michael_key));
#endif /* BIG_ENDIAN_HOST */
#endif

#ifdef notyet /* TODO: Check if this is required for wifi3.0 */
	if (sec_type != htt_sec_type_wapi) {
		qdf_mem_set(peer->tids_last_pn_valid, _EXT_TIDS, 0x00);
	} else {
		for (i = 0; i < DP_MAX_TIDS; i++) {
			/*
			 * Setting PN valid bit for WAPI sec_type,
			 * since WAPI PN has to be started with predefined value
			 */
			peer->tids_last_pn_valid[i] = 1;
			qdf_mem_copy(
				(u_int8_t *) &peer->tids_last_pn[i],
				(u_int8_t *) rx_pn, sizeof(union htt_rx_pn_t));
			peer->tids_last_pn[i].pn128[1] =
				qdf_cpu_to_le64(peer->tids_last_pn[i].pn128[1]);
			peer->tids_last_pn[i].pn128[0] =
				qdf_cpu_to_le64(peer->tids_last_pn[i].pn128[0]);
		}
	}
#endif
	/* TODO: Update HW TID queue with PN check parameters (pn type for
	 * all security types and last pn for WAPI) once REO command API
	 * is available
	 */
}

#ifndef CONFIG_WIN
/**
 * dp_register_peer() - Register peer into physical device
 * @pdev - data path device instance
 * @sta_desc - peer description
 *
 * Register peer into physical device
 *
 * Return: QDF_STATUS_SUCCESS registration success
 *         QDF_STATUS_E_FAULT peer not found
 */
QDF_STATUS dp_register_peer(struct cdp_pdev *pdev_handle,
		struct ol_txrx_desc_type *sta_desc)
{
	struct dp_peer *peer;
	struct dp_pdev *pdev = (struct dp_pdev *)pdev_handle;

	peer = dp_peer_find_by_local_id((struct cdp_pdev *)pdev,
			sta_desc->sta_id);
	if (!peer)
		return QDF_STATUS_E_FAULT;

	qdf_spin_lock_bh(&peer->peer_info_lock);
	peer->state = OL_TXRX_PEER_STATE_CONN;
	qdf_spin_unlock_bh(&peer->peer_info_lock);

	return QDF_STATUS_SUCCESS;
}

/**
 * dp_clear_peer() - remove peer from physical device
 * @pdev - data path device instance
 * @sta_id - local peer id
 *
 * remove peer from physical device
 *
 * Return: QDF_STATUS_SUCCESS registration success
 *         QDF_STATUS_E_FAULT peer not found
 */
QDF_STATUS dp_clear_peer(struct cdp_pdev *pdev_handle, uint8_t local_id)
{
	struct dp_peer *peer;
	struct dp_pdev *pdev = (struct dp_pdev *)pdev_handle;

	peer = dp_peer_find_by_local_id((struct cdp_pdev *)pdev, local_id);
	if (!peer)
		return QDF_STATUS_E_FAULT;

	qdf_spin_lock_bh(&peer->peer_info_lock);
	peer->state = OL_TXRX_PEER_STATE_DISC;
	qdf_spin_unlock_bh(&peer->peer_info_lock);

	return QDF_STATUS_SUCCESS;
}

/**
 * dp_find_peer_by_addr_and_vdev() - Find peer by peer mac address within vdev
 * @pdev - data path device instance
 * @vdev - virtual interface instance
 * @peer_addr - peer mac address
 * @peer_id - local peer id with target mac address
 *
 * Find peer by peer mac address within vdev
 *
 * Return: peer instance void pointer
 *         NULL cannot find target peer
 */
void *dp_find_peer_by_addr_and_vdev(struct cdp_pdev *pdev_handle,
		struct cdp_vdev *vdev_handle,
		uint8_t *peer_addr, uint8_t *local_id)
{
	struct dp_pdev *pdev = (struct dp_pdev *)pdev_handle;
	struct dp_vdev *vdev = (struct dp_vdev *)vdev_handle;
	struct dp_peer *peer;

	DP_TRACE(INFO, "vdev %pK peer_addr %pK", vdev, peer_addr);
	peer = dp_peer_find_hash_find(pdev->soc, peer_addr, 0);
	DP_TRACE(INFO, "peer %pK vdev %pK", peer, vdev);

	if (!peer)
		return NULL;

	if (peer->vdev != vdev)
		return NULL;

	*local_id = peer->local_id;
	DP_TRACE(INFO, "peer %pK vdev %pK local id %d", peer, vdev, *local_id);

	/* ref_cnt is incremented inside dp_peer_find_hash_find().
	 * Decrement it here.
	 */
	qdf_atomic_dec(&peer->ref_cnt);

	return peer;
}

/**
 * dp_local_peer_id() - Find local peer id within peer instance
 * @peer - peer instance
 *
 * Find local peer id within peer instance
 *
 * Return: local peer id
 */
uint16_t dp_local_peer_id(void *peer)
{
	return ((struct dp_peer *)peer)->local_id;
}

/**
 * dp_peer_find_by_local_id() - Find peer by local peer id
 * @pdev - data path device instance
 * @local_peer_id - local peer id want to find
 *
 * Find peer by local peer id within physical device
 *
 * Return: peer instance void pointer
 *         NULL cannot find target peer
 */
void *dp_peer_find_by_local_id(struct cdp_pdev *pdev_handle, uint8_t local_id)
{
	struct dp_peer *peer;
	struct dp_pdev *pdev = (struct dp_pdev *)pdev_handle;

	qdf_spin_lock_bh(&pdev->local_peer_ids.lock);
	peer = pdev->local_peer_ids.map[local_id];
	qdf_spin_unlock_bh(&pdev->local_peer_ids.lock);
	DP_TRACE(DEBUG, "peer %pK local id %d", peer, local_id);
	return peer;
}

/**
 * dp_peer_state_update() - update peer local state
 * @pdev - data path device instance
 * @peer_addr - peer mac address
 * @state - new peer local state
 *
 * update peer local state
 *
 * Return: QDF_STATUS_SUCCESS registration success
 */
QDF_STATUS dp_peer_state_update(struct cdp_pdev *pdev_handle, uint8_t *peer_mac,
		enum ol_txrx_peer_state state)
{
	struct dp_peer *peer;
	struct dp_pdev *pdev = (struct dp_pdev *)pdev_handle;

	peer =  dp_peer_find_hash_find(pdev->soc, peer_mac, 0);
	if (NULL == peer) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
		"Failed to find peer for: [%pM]", peer_mac);
		return QDF_STATUS_E_FAILURE;
	}
	peer->state = state;

	DP_TRACE(INFO, "peer %pK state %d", peer, peer->state);
	/* ref_cnt is incremented inside dp_peer_find_hash_find().
	 * Decrement it here.
	 */
	qdf_atomic_dec(&peer->ref_cnt);

	return QDF_STATUS_SUCCESS;
}

/**
 * dp_get_vdevid() - Get virtaul interface id which peer registered
 * @peer - peer instance
 * @vdev_id - virtaul interface id which peer registered
 *
 * Get virtaul interface id which peer registered
 *
 * Return: QDF_STATUS_SUCCESS registration success
 */
QDF_STATUS dp_get_vdevid(void *peer_handle, uint8_t *vdev_id)
{
	struct dp_peer *peer = peer_handle;

	DP_TRACE(INFO, "peer %pK vdev %pK vdev id %d",
			peer, peer->vdev, peer->vdev->vdev_id);
	*vdev_id = peer->vdev->vdev_id;
	return QDF_STATUS_SUCCESS;
}

struct cdp_vdev *dp_get_vdev_by_sta_id(struct cdp_pdev *pdev_handle,
				       uint8_t sta_id)
{
	struct dp_pdev *pdev = (struct dp_pdev *)pdev_handle;
	struct dp_peer *peer = NULL;

	if (sta_id >= WLAN_MAX_STA_COUNT) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_INFO_HIGH,
			  "Invalid sta id passed");
		return NULL;
	}

	if (!pdev) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_INFO_HIGH,
			  "PDEV not found for sta_id [%d]", sta_id);
		return NULL;
	}

	peer = dp_peer_find_by_local_id((struct cdp_pdev *)pdev, sta_id);
	if (!peer) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_INFO_HIGH,
			  "PEER [%d] not found", sta_id);
		return NULL;
	}

	return (struct cdp_vdev *)peer->vdev;
}

/**
 * dp_get_vdev_for_peer() - Get virtual interface instance which peer belongs
 * @peer - peer instance
 *
 * Get virtual interface instance which peer belongs
 *
 * Return: virtual interface instance pointer
 *         NULL in case cannot find
 */
struct cdp_vdev *dp_get_vdev_for_peer(void *peer_handle)
{
	struct dp_peer *peer = peer_handle;

	DP_TRACE(INFO, "peer %pK vdev %pK", peer, peer->vdev);
	return (struct cdp_vdev *)peer->vdev;
}

/**
 * dp_peer_get_peer_mac_addr() - Get peer mac address
 * @peer - peer instance
 *
 * Get peer mac address
 *
 * Return: peer mac address pointer
 *         NULL in case cannot find
 */
uint8_t *dp_peer_get_peer_mac_addr(void *peer_handle)
{
	struct dp_peer *peer = peer_handle;
	uint8_t *mac;

	mac = peer->mac_addr.raw;
	DP_TRACE(INFO, "peer %pK mac 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x",
		peer, mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
	return peer->mac_addr.raw;
}

/**
 * dp_get_peer_state() - Get local peer state
 * @peer - peer instance
 *
 * Get local peer state
 *
 * Return: peer status
 */
int dp_get_peer_state(void *peer_handle)
{
	struct dp_peer *peer = peer_handle;

	DP_TRACE(DEBUG, "peer %pK stats %d", peer, peer->state);
	return peer->state;
}

/**
 * dp_get_last_assoc_received() - get time of last assoc received
 * @peer_handle: peer handle
 *
 * Return: pointer for the time of last assoc received
 */
qdf_time_t *dp_get_last_assoc_received(void *peer_handle)
{
	struct dp_peer *peer = peer_handle;

	DP_TRACE(INFO, "peer %pK last_assoc_rcvd: %lu", peer,
		peer->last_assoc_rcvd);
	return &peer->last_assoc_rcvd;
}

/**
 * dp_get_last_disassoc_received() - get time of last disassoc received
 * @peer_handle: peer handle
 *
 * Return: pointer for the time of last disassoc received
 */
qdf_time_t *dp_get_last_disassoc_received(void *peer_handle)
{
	struct dp_peer *peer = peer_handle;

	DP_TRACE(INFO, "peer %pK last_disassoc_rcvd: %lu", peer,
		peer->last_disassoc_rcvd);
	return &peer->last_disassoc_rcvd;
}

/**
 * dp_get_last_deauth_received() - get time of last deauth received
 * @peer_handle: peer handle
 *
 * Return: pointer for the time of last deauth received
 */
qdf_time_t *dp_get_last_deauth_received(void *peer_handle)
{
	struct dp_peer *peer = peer_handle;

	DP_TRACE(INFO, "peer %pK last_deauth_rcvd: %lu", peer,
		peer->last_deauth_rcvd);
	return &peer->last_deauth_rcvd;
}

/**
 * dp_local_peer_id_pool_init() - local peer id pool alloc for physical device
 * @pdev - data path device instance
 *
 * local peer id pool alloc for physical device
 *
 * Return: none
 */
void dp_local_peer_id_pool_init(struct dp_pdev *pdev)
{
	int i;

	/* point the freelist to the first ID */
	pdev->local_peer_ids.freelist = 0;

	/* link each ID to the next one */
	for (i = 0; i < OL_TXRX_NUM_LOCAL_PEER_IDS; i++) {
		pdev->local_peer_ids.pool[i] = i + 1;
		pdev->local_peer_ids.map[i] = NULL;
	}

	/* link the last ID to itself, to mark the end of the list */
	i = OL_TXRX_NUM_LOCAL_PEER_IDS;
	pdev->local_peer_ids.pool[i] = i;

	qdf_spinlock_create(&pdev->local_peer_ids.lock);
	DP_TRACE(INFO, "Peer pool init");
}

/**
 * dp_local_peer_id_alloc() - allocate local peer id
 * @pdev - data path device instance
 * @peer - new peer instance
 *
 * allocate local peer id
 *
 * Return: none
 */
void dp_local_peer_id_alloc(struct dp_pdev *pdev, struct dp_peer *peer)
{
	int i;

	qdf_spin_lock_bh(&pdev->local_peer_ids.lock);
	i = pdev->local_peer_ids.freelist;
	if (pdev->local_peer_ids.pool[i] == i) {
		/* the list is empty, except for the list-end marker */
		peer->local_id = OL_TXRX_INVALID_LOCAL_PEER_ID;
	} else {
		/* take the head ID and advance the freelist */
		peer->local_id = i;
		pdev->local_peer_ids.freelist = pdev->local_peer_ids.pool[i];
		pdev->local_peer_ids.map[i] = peer;
	}
	qdf_spin_unlock_bh(&pdev->local_peer_ids.lock);
	DP_TRACE(INFO, "peer %pK, local id %d", peer, peer->local_id);
}

/**
 * dp_local_peer_id_free() - remove local peer id
 * @pdev - data path device instance
 * @peer - peer instance should be removed
 *
 * remove local peer id
 *
 * Return: none
 */
void dp_local_peer_id_free(struct dp_pdev *pdev, struct dp_peer *peer)
{
	int i = peer->local_id;
	if ((i == OL_TXRX_INVALID_LOCAL_PEER_ID) ||
	    (i >= OL_TXRX_NUM_LOCAL_PEER_IDS)) {
		return;
	}

	/* put this ID on the head of the freelist */
	qdf_spin_lock_bh(&pdev->local_peer_ids.lock);
	pdev->local_peer_ids.pool[i] = pdev->local_peer_ids.freelist;
	pdev->local_peer_ids.freelist = i;
	pdev->local_peer_ids.map[i] = NULL;
	qdf_spin_unlock_bh(&pdev->local_peer_ids.lock);
}
#endif

/**
 * dp_get_peer_mac_addr_frm_id(): get mac address of the peer
 * @soc_handle: DP SOC handle
 * @peer_id:peer_id of the peer
 *
 * return: vdev_id of the vap
 */
uint8_t dp_get_peer_mac_addr_frm_id(struct cdp_soc_t *soc_handle,
		uint16_t peer_id, uint8_t *peer_mac)
{
	struct dp_soc *soc = (struct dp_soc *)soc_handle;
	struct dp_peer *peer;

	peer = dp_peer_find_by_id(soc, peer_id);

	QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_DEBUG,
			"soc %pK peer_id %d", soc, peer_id);

	if (!peer) {
		QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
				"peer not found ");
		return CDP_INVALID_VDEV_ID;
	}

	qdf_mem_copy(peer_mac, peer->mac_addr.raw, 6);
	return peer->vdev->vdev_id;
}

/**
 * dp_peer_rxtid_stats: Retried Rx TID (REO queue) stats from HW
 * @peer: DP peer handle
 * @dp_stats_cmd_cb: REO command callback function
 * @cb_ctxt: Callback context
 *
 * Return: none
 */
void dp_peer_rxtid_stats(struct dp_peer *peer, void (*dp_stats_cmd_cb),
			void *cb_ctxt)
{
	struct dp_soc *soc = peer->vdev->pdev->soc;
	struct hal_reo_cmd_params params;
	int i;

	if (!dp_stats_cmd_cb)
		return;

	qdf_mem_zero(&params, sizeof(params));
	for (i = 0; i < DP_MAX_TIDS; i++) {
		struct dp_rx_tid *rx_tid = &peer->rx_tid[i];
		if (rx_tid->hw_qdesc_vaddr_unaligned != NULL) {
			params.std.need_status = 1;
			params.std.addr_lo =
				rx_tid->hw_qdesc_paddr & 0xffffffff;
			params.std.addr_hi =
				(uint64_t)(rx_tid->hw_qdesc_paddr) >> 32;

			if (cb_ctxt) {
				dp_reo_send_cmd(soc, CMD_GET_QUEUE_STATS,
					&params, dp_stats_cmd_cb, cb_ctxt);
			} else {
				dp_reo_send_cmd(soc, CMD_GET_QUEUE_STATS,
					&params, dp_stats_cmd_cb, rx_tid);
			}

			/* Flush REO descriptor from HW cache to update stats
			 * in descriptor memory. This is to help debugging */
			qdf_mem_zero(&params, sizeof(params));
			params.std.need_status = 0;
			params.std.addr_lo =
				rx_tid->hw_qdesc_paddr & 0xffffffff;
			params.std.addr_hi =
				(uint64_t)(rx_tid->hw_qdesc_paddr) >> 32;
			params.u.fl_cache_params.flush_no_inval = 1;
			dp_reo_send_cmd(soc, CMD_FLUSH_CACHE, &params, NULL,
				NULL);
		}
	}
}