android_kernel_samsung_sm8650-modules/dp/wifi3.0/dp_rx.h

/*
 * 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.
 */

#ifndef _DP_RX_H
#define _DP_RX_H

#include "hal_rx.h"
#include "dp_tx.h"
#include "dp_peer.h"
#include "dp_internal.h"

#ifdef RXDMA_OPTIMIZATION
#define RX_BUFFER_ALIGNMENT     128
#else /* RXDMA_OPTIMIZATION */
#define RX_BUFFER_ALIGNMENT     4
#endif /* RXDMA_OPTIMIZATION */

#ifdef QCA_HOST2FW_RXBUF_RING
#define DP_WBM2SW_RBM HAL_RX_BUF_RBM_SW1_BM
#else
#define DP_WBM2SW_RBM HAL_RX_BUF_RBM_SW3_BM
#endif
#define RX_BUFFER_SIZE			2048
#define RX_BUFFER_RESERVATION   0

#define DP_PEER_METADATA_PEER_ID_MASK	0x0000ffff
#define DP_PEER_METADATA_PEER_ID_SHIFT	0
#define DP_PEER_METADATA_VDEV_ID_MASK	0x00070000
#define DP_PEER_METADATA_VDEV_ID_SHIFT	16

#define DP_PEER_METADATA_PEER_ID_GET(_peer_metadata)		\
	(((_peer_metadata) & DP_PEER_METADATA_PEER_ID_MASK)	\
			>> DP_PEER_METADATA_PEER_ID_SHIFT)

#define DP_PEER_METADATA_ID_GET(_peer_metadata)			\
	(((_peer_metadata) & DP_PEER_METADATA_VDEV_ID_MASK)	\
			>> DP_PEER_METADATA_VDEV_ID_SHIFT)

#define DP_RX_DESC_MAGIC 0xdec0de

/**
 * struct dp_rx_desc
 *
 * @nbuf		: VA of the "skb" posted
 * @rx_buf_start	: VA of the original Rx buffer, before
 *			  movement of any skb->data pointer
 * @cookie		: index into the sw array which holds
 *			  the sw Rx descriptors
 *			  Cookie space is 21 bits:
 *			  lower 18 bits -- index
 *			  upper  3 bits -- pool_id
 * @pool_id		: pool Id for which this allocated.
 *			  Can only be used if there is no flow
 *			  steering
 * @in_use		  rx_desc is in use
 * @unmapped		  used to mark rx_desc an unmapped if the corresponding
 *			  nbuf is already unmapped
 */
struct dp_rx_desc {
	qdf_nbuf_t nbuf;
	uint8_t *rx_buf_start;
	uint32_t cookie;
	uint8_t	 pool_id;
#ifdef RX_DESC_DEBUG_CHECK
	uint32_t magic;
#endif
	uint8_t	in_use:1,
	unmapped:1;
};

#define RX_DESC_COOKIE_INDEX_SHIFT		0
#define RX_DESC_COOKIE_INDEX_MASK		0x3ffff /* 18 bits */
#define RX_DESC_COOKIE_POOL_ID_SHIFT		18
#define RX_DESC_COOKIE_POOL_ID_MASK		0x1c0000

#define DP_RX_DESC_COOKIE_POOL_ID_GET(_cookie)		\
	(((_cookie) & RX_DESC_COOKIE_POOL_ID_MASK) >>	\
			RX_DESC_COOKIE_POOL_ID_SHIFT)

#define DP_RX_DESC_COOKIE_INDEX_GET(_cookie)		\
	(((_cookie) & RX_DESC_COOKIE_INDEX_MASK) >>	\
			RX_DESC_COOKIE_INDEX_SHIFT)

/*
 *dp_rx_xor_block() - xor block of data
 *@b: destination data block
 *@a: source data block
 *@len: length of the data to process
 *
 *Returns: None
 */
static inline void dp_rx_xor_block(uint8_t *b, const uint8_t *a, qdf_size_t len)
{
	qdf_size_t i;

	for (i = 0; i < len; i++)
		b[i] ^= a[i];
}

/*
 *dp_rx_rotl() - rotate the bits left
 *@val: unsigned integer input value
 *@bits: number of bits
 *
 *Returns: Integer with left rotated by number of 'bits'
 */
static inline uint32_t dp_rx_rotl(uint32_t val, int bits)
{
	return (val << bits) | (val >> (32 - bits));
}

/*
 *dp_rx_rotr() - rotate the bits right
 *@val: unsigned integer input value
 *@bits: number of bits
 *
 *Returns: Integer with right rotated by number of 'bits'
 */
static inline uint32_t dp_rx_rotr(uint32_t val, int bits)
{
	return (val >> bits) | (val << (32 - bits));
}

/*
 * dp_set_rx_queue() - set queue_mapping in skb
 * @nbuf: skb
 * @queue_id: rx queue_id
 *
 * Return: void
 */
#ifdef QCA_OL_RX_MULTIQ_SUPPORT
static inline void dp_set_rx_queue(qdf_nbuf_t nbuf, uint8_t queue_id)
{
	qdf_nbuf_record_rx_queue(nbuf, queue_id);
	return;
}
#else
static inline void dp_set_rx_queue(qdf_nbuf_t nbuf, uint8_t queue_id)
{
}
#endif

/*
 *dp_rx_xswap() - swap the bits left
 *@val: unsigned integer input value
 *
 *Returns: Integer with bits swapped
 */
static inline uint32_t dp_rx_xswap(uint32_t val)
{
	return ((val & 0x00ff00ff) << 8) | ((val & 0xff00ff00) >> 8);
}

/*
 *dp_rx_get_le32_split() - get little endian 32 bits split
 *@b0: byte 0
 *@b1: byte 1
 *@b2: byte 2
 *@b3: byte 3
 *
 *Returns: Integer with split little endian 32 bits
 */
static inline uint32_t dp_rx_get_le32_split(uint8_t b0, uint8_t b1, uint8_t b2,
					uint8_t b3)
{
	return b0 | (b1 << 8) | (b2 << 16) | (b3 << 24);
}

/*
 *dp_rx_get_le32() - get little endian 32 bits
 *@b0: byte 0
 *@b1: byte 1
 *@b2: byte 2
 *@b3: byte 3
 *
 *Returns: Integer with little endian 32 bits
 */
static inline uint32_t dp_rx_get_le32(const uint8_t *p)
{
	return dp_rx_get_le32_split(p[0], p[1], p[2], p[3]);
}

/*
 * dp_rx_put_le32() - put little endian 32 bits
 * @p: destination char array
 * @v: source 32-bit integer
 *
 * Returns: None
 */
static inline void dp_rx_put_le32(uint8_t *p, uint32_t v)
{
	p[0] = (v) & 0xff;
	p[1] = (v >> 8) & 0xff;
	p[2] = (v >> 16) & 0xff;
	p[3] = (v >> 24) & 0xff;
}

/* Extract michal mic block of data */
#define dp_rx_michael_block(l, r)	\
	do {					\
		r ^= dp_rx_rotl(l, 17);	\
		l += r;				\
		r ^= dp_rx_xswap(l);		\
		l += r;				\
		r ^= dp_rx_rotl(l, 3);	\
		l += r;				\
		r ^= dp_rx_rotr(l, 2);	\
		l += r;				\
	} while (0)

/**
 * struct dp_rx_desc_list_elem_t
 *
 * @next		: Next pointer to form free list
 * @rx_desc		: DP Rx descriptor
 */
union dp_rx_desc_list_elem_t {
	union dp_rx_desc_list_elem_t *next;
	struct dp_rx_desc rx_desc;
};

/**
 * dp_rx_cookie_2_va_rxdma_buf() - Converts cookie to a virtual address of
 *			 the Rx descriptor on Rx DMA source ring buffer
 * @soc: core txrx main context
 * @cookie: cookie used to lookup virtual address
 *
 * Return: void *: Virtual Address of the Rx descriptor
 */
static inline
void *dp_rx_cookie_2_va_rxdma_buf(struct dp_soc *soc, uint32_t cookie)
{
	uint8_t pool_id = DP_RX_DESC_COOKIE_POOL_ID_GET(cookie);
	uint16_t index = DP_RX_DESC_COOKIE_INDEX_GET(cookie);
	struct rx_desc_pool *rx_desc_pool;

	if (qdf_unlikely(pool_id >= MAX_RXDESC_POOLS))
		return NULL;

	rx_desc_pool = &soc->rx_desc_buf[pool_id];

	if (qdf_unlikely(index >= rx_desc_pool->pool_size))
		return NULL;

	return &(soc->rx_desc_buf[pool_id].array[index].rx_desc);
}

/**
 * dp_rx_cookie_2_va_mon_buf() - Converts cookie to a virtual address of
 *			 the Rx descriptor on monitor ring buffer
 * @soc: core txrx main context
 * @cookie: cookie used to lookup virtual address
 *
 * Return: void *: Virtual Address of the Rx descriptor
 */
static inline
void *dp_rx_cookie_2_va_mon_buf(struct dp_soc *soc, uint32_t cookie)
{
	uint8_t pool_id = DP_RX_DESC_COOKIE_POOL_ID_GET(cookie);
	uint16_t index = DP_RX_DESC_COOKIE_INDEX_GET(cookie);
	/* TODO */
	/* Add sanity for pool_id & index */
	return &(soc->rx_desc_mon[pool_id].array[index].rx_desc);
}

/**
 * dp_rx_cookie_2_va_mon_status() - Converts cookie to a virtual address of
 *			 the Rx descriptor on monitor status ring buffer
 * @soc: core txrx main context
 * @cookie: cookie used to lookup virtual address
 *
 * Return: void *: Virtual Address of the Rx descriptor
 */
static inline
void *dp_rx_cookie_2_va_mon_status(struct dp_soc *soc, uint32_t cookie)
{
	uint8_t pool_id = DP_RX_DESC_COOKIE_POOL_ID_GET(cookie);
	uint16_t index = DP_RX_DESC_COOKIE_INDEX_GET(cookie);
	/* TODO */
	/* Add sanity for pool_id & index */
	return &(soc->rx_desc_status[pool_id].array[index].rx_desc);
}

void dp_rx_add_desc_list_to_free_list(struct dp_soc *soc,
				union dp_rx_desc_list_elem_t **local_desc_list,
				union dp_rx_desc_list_elem_t **tail,
				uint16_t pool_id,
				struct rx_desc_pool *rx_desc_pool);

uint16_t dp_rx_get_free_desc_list(struct dp_soc *soc, uint32_t pool_id,
				struct rx_desc_pool *rx_desc_pool,
				uint16_t num_descs,
				union dp_rx_desc_list_elem_t **desc_list,
				union dp_rx_desc_list_elem_t **tail);


QDF_STATUS dp_rx_pdev_attach(struct dp_pdev *pdev);

void dp_rx_pdev_detach(struct dp_pdev *pdev);


uint32_t
dp_rx_process(struct dp_intr *int_ctx, void *hal_ring, uint8_t reo_ring_num,
	      uint32_t quota);

uint32_t dp_rx_err_process(struct dp_soc *soc, void *hal_ring, uint32_t quota);

uint32_t
dp_rx_wbm_err_process(struct dp_soc *soc, void *hal_ring, uint32_t quota);

/**
 * dp_rx_sg_create() - create a frag_list for MSDUs which are spread across
 *		     multiple nbufs.
 * @nbuf: pointer to the first msdu of an amsdu.
 * @rx_tlv_hdr: pointer to the start of RX TLV headers.
 *
 * This function implements the creation of RX frag_list for cases
 * where an MSDU is spread across multiple nbufs.
 *
 * Return: returns the head nbuf which contains complete frag_list.
 */
qdf_nbuf_t dp_rx_sg_create(qdf_nbuf_t nbuf, uint8_t *rx_tlv_hdr);

QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc,
				uint32_t pool_id,
				uint32_t pool_size,
				struct rx_desc_pool *rx_desc_pool);

void dp_rx_desc_pool_free(struct dp_soc *soc,
				uint32_t pool_id,
				struct rx_desc_pool *rx_desc_pool);

void dp_rx_deliver_raw(struct dp_vdev *vdev, qdf_nbuf_t nbuf_list,
				struct dp_peer *peer);

/**
 * dp_rx_add_to_free_desc_list() - Adds to a local free descriptor list
 *
 * @head: pointer to the head of local free list
 * @tail: pointer to the tail of local free list
 * @new: new descriptor that is added to the free list
 *
 * Return: void:
 */
static inline
void dp_rx_add_to_free_desc_list(union dp_rx_desc_list_elem_t **head,
				 union dp_rx_desc_list_elem_t **tail,
				 struct dp_rx_desc *new)
{
	qdf_assert(head && new);

	new->nbuf = NULL;
	new->in_use = 0;
	new->unmapped = 0;

	((union dp_rx_desc_list_elem_t *)new)->next = *head;
	*head = (union dp_rx_desc_list_elem_t *)new;
	if (*tail == NULL)
		*tail = *head;

}

/**
 * dp_rx_wds_srcport_learn() - Add or update the STA PEER which
 *				is behind the WDS repeater.
 *
 * @soc: core txrx main context
 * @rx_tlv_hdr: base address of RX TLV header
 * @ta_peer: WDS repeater peer
 * @nbuf: rx pkt
 *
 * Return: void:
 */
#ifdef FEATURE_WDS
static inline void
dp_rx_wds_srcport_learn(struct dp_soc *soc,
			 uint8_t *rx_tlv_hdr,
			 struct dp_peer *ta_peer,
			 qdf_nbuf_t nbuf)
{
	uint16_t sa_sw_peer_id = hal_rx_msdu_end_sa_sw_peer_id_get(rx_tlv_hdr);
	uint32_t flags = IEEE80211_NODE_F_WDS_HM;
	uint32_t ret = 0;
	uint8_t wds_src_mac[IEEE80211_ADDR_LEN];
	struct dp_peer *sa_peer;
	struct dp_ast_entry *ast;
	uint16_t sa_idx;

	if (qdf_unlikely(!ta_peer))
		return;

	/* For AP mode : Do wds source port learning only if it is a
	 * 4-address mpdu
	 *
	 * For STA mode : Frames from RootAP backend will be in 3-address mode,
	 * till RootAP does the WDS source port learning; Hence in repeater/STA
	 * mode, we enable learning even in 3-address mode , to avoid RootAP
	 * backbone getting wrongly learnt as MEC on repeater
	 */
	if (ta_peer->vdev->opmode != wlan_op_mode_sta) {
		if (!(qdf_nbuf_is_rx_chfrag_start(nbuf) &&
		      hal_rx_get_mpdu_mac_ad4_valid(rx_tlv_hdr)))
			return;
	} else {
		/* For HKv2 Source port learing is not needed in STA mode
		 * as we have support in HW
		 */
		if (soc->ast_override_support)
			return;
	}

	memcpy(wds_src_mac, (qdf_nbuf_data(nbuf) + IEEE80211_ADDR_LEN),
		IEEE80211_ADDR_LEN);

	if (qdf_unlikely(!hal_rx_msdu_end_sa_is_valid_get(rx_tlv_hdr))) {
		ret = dp_peer_add_ast(soc,
					ta_peer,
					wds_src_mac,
					CDP_TXRX_AST_TYPE_WDS,
					flags);
		return;
	}

	/*
	 * Get the AST entry from HW SA index and mark it as active
	 */
	sa_idx = hal_rx_msdu_end_sa_idx_get(rx_tlv_hdr);

	qdf_spin_lock_bh(&soc->ast_lock);
	ast = soc->ast_table[sa_idx];

	if (!ast) {
		qdf_spin_unlock_bh(&soc->ast_lock);
		return;
	}

	qdf_spin_unlock_bh(&soc->ast_lock);

	/*
	 * Ensure we are updating the right AST entry by
	 * validating ast_idx.
	 * There is a possibility we might arrive here without
	 * AST MAP event , so this check is mandatory
	 */
	if (ast->ast_idx == sa_idx)
		ast->is_active = TRUE;

	if (sa_sw_peer_id != ta_peer->peer_ids[0]) {
		sa_peer = ast->peer;

		if ((ast->type != CDP_TXRX_AST_TYPE_STATIC) &&
		    (ast->type != CDP_TXRX_AST_TYPE_SELF)) {
			if (ast->pdev_id != ta_peer->vdev->pdev->pdev_id) {
				ret = dp_peer_add_ast(soc,
						      ta_peer, wds_src_mac,
						      CDP_TXRX_AST_TYPE_WDS,
						      flags);
			} else {
				qdf_spin_lock_bh(&soc->ast_lock);
				dp_peer_update_ast(soc, ta_peer, ast, flags);
				qdf_spin_unlock_bh(&soc->ast_lock);
				return;
			}
		}
		/*
		 * Do not kickout STA if it belongs to a different radio.
		 * For DBDC repeater, it is possible to arrive here
		 * for multicast loopback frames originated from connected
		 * clients and looped back (intrabss) by Root AP
		 */
		if (ast->pdev_id != ta_peer->vdev->pdev->pdev_id) {
			return;
		}

		/*
		 * Kickout, when direct associated peer(SA) roams
		 * to another AP and reachable via TA peer
		 */
		if (!sa_peer->delete_in_progress) {
			sa_peer->delete_in_progress = true;
			if (soc->cdp_soc.ol_ops->peer_sta_kickout) {
				soc->cdp_soc.ol_ops->peer_sta_kickout(
						sa_peer->vdev->pdev->ctrl_pdev,
						wds_src_mac);
			}
		}
	}

	return;
}
#else
static inline void
dp_rx_wds_srcport_learn(struct dp_soc *soc,
		uint8_t *rx_tlv_hdr,
		struct dp_peer *ta_peer,
		qdf_nbuf_t nbuf)
{
}
#endif

uint8_t dp_rx_process_invalid_peer(struct dp_soc *soc, qdf_nbuf_t nbuf);
void dp_rx_process_invalid_peer_wrapper(struct dp_soc *soc,
		qdf_nbuf_t mpdu, bool mpdu_done);
void dp_rx_process_mic_error(struct dp_soc *soc, qdf_nbuf_t nbuf, uint8_t *rx_tlv_hdr);

#define DP_RX_LIST_APPEND(head, tail, elem) \
	do {                                                          \
		if (!(head)) {                                        \
			(head) = (elem);                              \
			QDF_NBUF_CB_RX_NUM_ELEMENTS_IN_LIST(head) = 1;\
		} else {                                              \
			qdf_nbuf_set_next((tail), (elem));            \
			QDF_NBUF_CB_RX_NUM_ELEMENTS_IN_LIST(head)++;  \
		}                                                     \
		(tail) = (elem);                                      \
		qdf_nbuf_set_next((tail), NULL);                      \
	} while (0)

#ifndef BUILD_X86
static inline int check_x86_paddr(struct dp_soc *dp_soc, qdf_nbuf_t *rx_netbuf,
		qdf_dma_addr_t *paddr, struct dp_pdev *pdev)
{
	return QDF_STATUS_SUCCESS;
}
#else
#define MAX_RETRY 100
static inline int check_x86_paddr(struct dp_soc *dp_soc, qdf_nbuf_t *rx_netbuf,
		qdf_dma_addr_t *paddr, struct dp_pdev *pdev)
{
	uint32_t nbuf_retry = 0;
	int32_t ret;
	const uint32_t x86_phy_addr = 0x50000000;
	/*
	 * in M2M emulation platforms (x86) the memory below 0x50000000
	 * is reserved for target use, so any memory allocated in this
	 * region should not be used by host
	 */
	do {
		if (qdf_likely(*paddr > x86_phy_addr))
			return QDF_STATUS_SUCCESS;
		else {
			QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_INFO,
					"phy addr %pK exceeded 0x50000000 trying again",
					paddr);

			nbuf_retry++;
			if ((*rx_netbuf)) {
				qdf_nbuf_unmap_single(dp_soc->osdev, *rx_netbuf,
						QDF_DMA_BIDIRECTIONAL);
				/* Not freeing buffer intentionally.
				 * Observed that same buffer is getting
				 * re-allocated resulting in longer load time
				 * WMI init timeout.
				 * This buffer is anyway not useful so skip it.
				 **/
			}

			*rx_netbuf = qdf_nbuf_alloc(dp_soc->osdev,
							RX_BUFFER_SIZE,
							RX_BUFFER_RESERVATION,
							RX_BUFFER_ALIGNMENT,
							FALSE);

			if (qdf_unlikely(!(*rx_netbuf)))
				return QDF_STATUS_E_FAILURE;

			ret = qdf_nbuf_map_single(dp_soc->osdev, *rx_netbuf,
							QDF_DMA_BIDIRECTIONAL);

			if (qdf_unlikely(ret == QDF_STATUS_E_FAILURE)) {
				qdf_nbuf_free(*rx_netbuf);
				*rx_netbuf = NULL;
				continue;
			}

			*paddr = qdf_nbuf_get_frag_paddr(*rx_netbuf, 0);
		}
	} while (nbuf_retry < MAX_RETRY);

	if ((*rx_netbuf)) {
		qdf_nbuf_unmap_single(dp_soc->osdev, *rx_netbuf,
					QDF_DMA_BIDIRECTIONAL);
		qdf_nbuf_free(*rx_netbuf);
	}

	return QDF_STATUS_E_FAILURE;
}
#endif

/**
 * dp_rx_cookie_2_link_desc_va() - Converts cookie to a virtual address of
 *				   the MSDU Link Descriptor
 * @soc: core txrx main context
 * @buf_info: buf_info include cookie that used to lookup virtual address of
 * link descriptor Normally this is just an index into a per SOC array.
 *
 * This is the VA of the link descriptor, that HAL layer later uses to
 * retrieve the list of MSDU's for a given MPDU.
 *
 * Return: void *: Virtual Address of the Rx descriptor
 */
static inline
void *dp_rx_cookie_2_link_desc_va(struct dp_soc *soc,
				  struct hal_buf_info *buf_info)
{
	void *link_desc_va;
	uint32_t bank_id = LINK_DESC_COOKIE_BANK_ID(buf_info->sw_cookie);


	/* TODO */
	/* Add sanity for  cookie */

	link_desc_va = soc->link_desc_banks[bank_id].base_vaddr +
		(buf_info->paddr -
			soc->link_desc_banks[bank_id].base_paddr);

	return link_desc_va;
}

/**
 * dp_rx_cookie_2_mon_link_desc_va() - Converts cookie to a virtual address of
 *				   the MSDU Link Descriptor
 * @pdev: core txrx pdev context
 * @buf_info: buf_info includes cookie that used to lookup virtual address of
 * link descriptor. Normally this is just an index into a per pdev array.
 *
 * This is the VA of the link descriptor in monitor mode destination ring,
 * that HAL layer later uses to retrieve the list of MSDU's for a given MPDU.
 *
 * Return: void *: Virtual Address of the Rx descriptor
 */
static inline
void *dp_rx_cookie_2_mon_link_desc_va(struct dp_pdev *pdev,
				  struct hal_buf_info *buf_info,
				  int mac_id)
{
	void *link_desc_va;
	int mac_for_pdev = dp_get_mac_id_for_mac(pdev->soc, mac_id);

	/* TODO */
	/* Add sanity for  cookie */

	link_desc_va =
	   pdev->link_desc_banks[mac_for_pdev][buf_info->sw_cookie].base_vaddr +
	   (buf_info->paddr -
	   pdev->link_desc_banks[mac_for_pdev][buf_info->sw_cookie].base_paddr);

	return link_desc_va;
}

/**
 * dp_rx_defrag_concat() - Concatenate the fragments
 *
 * @dst: destination pointer to the buffer
 * @src: source pointer from where the fragment payload is to be copied
 *
 * Return: QDF_STATUS
 */
static inline QDF_STATUS dp_rx_defrag_concat(qdf_nbuf_t dst, qdf_nbuf_t src)
{
	/*
	 * Inside qdf_nbuf_cat, if it is necessary to reallocate dst
	 * to provide space for src, the headroom portion is copied from
	 * the original dst buffer to the larger new dst buffer.
	 * (This is needed, because the headroom of the dst buffer
	 * contains the rx desc.)
	 */
	if (qdf_nbuf_cat(dst, src))
		return QDF_STATUS_E_DEFRAG_ERROR;

	return QDF_STATUS_SUCCESS;
}

/*
 * dp_rx_ast_set_active() - set the active flag of the astentry
 *				    corresponding to a hw index.
 * @soc: core txrx main context
 * @sa_idx: hw idx
 * @is_active: active flag
 *
 */
#ifdef FEATURE_WDS
static inline QDF_STATUS dp_rx_ast_set_active(struct dp_soc *soc, uint16_t sa_idx, bool is_active)
{
	struct dp_ast_entry *ast;
	qdf_spin_lock_bh(&soc->ast_lock);
	ast = soc->ast_table[sa_idx];

	/*
	 * Ensure we are updating the right AST entry by
	 * validating ast_idx.
	 * There is a possibility we might arrive here without
	 * AST MAP event , so this check is mandatory
	 */
	if (ast && (ast->ast_idx == sa_idx)) {
		ast->is_active = is_active;
		qdf_spin_unlock_bh(&soc->ast_lock);
		return QDF_STATUS_SUCCESS;
	}

	qdf_spin_unlock_bh(&soc->ast_lock);
	return QDF_STATUS_E_FAILURE;
}
#else
static inline QDF_STATUS dp_rx_ast_set_active(struct dp_soc *soc, uint16_t sa_idx, bool is_active)
{
	return QDF_STATUS_SUCCESS;
}
#endif

/*
 * check_qwrap_multicast_loopback() - Check if rx packet is a loopback packet.
 *					In qwrap mode, packets originated from
 *					any vdev should not loopback and
 *					should be dropped.
 * @vdev: vdev on which rx packet is received
 * @nbuf: rx pkt
 *
 */
#if ATH_SUPPORT_WRAP
static inline bool check_qwrap_multicast_loopback(struct dp_vdev *vdev,
						qdf_nbuf_t nbuf)
{
	struct dp_vdev *psta_vdev;
	struct dp_pdev *pdev = vdev->pdev;
	struct dp_soc *soc = pdev->soc;
	uint8_t *data = qdf_nbuf_data(nbuf);
	uint8_t i;

	for (i = 0; i < MAX_PDEV_CNT && soc->pdev_list[i]; i++) {
		pdev = soc->pdev_list[i];
		if (qdf_unlikely(vdev->proxysta_vdev)) {
			/* In qwrap isolation mode, allow loopback packets as all
			 * packets go to RootAP and Loopback on the mpsta.
			 */
			if (vdev->isolation_vdev)
				return false;
			TAILQ_FOREACH(psta_vdev, &pdev->vdev_list, vdev_list_elem) {
				if (qdf_unlikely(psta_vdev->proxysta_vdev &&
					!qdf_mem_cmp(psta_vdev->mac_addr.raw,
					&data[DP_MAC_ADDR_LEN], DP_MAC_ADDR_LEN))) {
					/* Drop packet if source address is equal to
					 * any of the vdev addresses.
					 */
					return true;
				}
			}
		}
	}
	return false;
}
#else
static inline bool check_qwrap_multicast_loopback(struct dp_vdev *vdev,
						qdf_nbuf_t nbuf)
{
	return false;
}
#endif

/*
 * dp_rx_buffers_replenish() - replenish rxdma ring with rx nbufs
 *			       called during dp rx initialization
 *			       and at the end of dp_rx_process.
 *
 * @soc: core txrx main context
 * @mac_id: mac_id which is one of 3 mac_ids
 * @dp_rxdma_srng: dp rxdma circular ring
 * @rx_desc_pool: Pointer to free Rx descriptor pool
 * @num_req_buffers: number of buffer to be replenished
 * @desc_list: list of descs if called from dp_rx_process
 *	       or NULL during dp rx initialization or out of buffer
 *	       interrupt.
 * @tail: tail of descs list
 * Return: return success or failure
 */
QDF_STATUS dp_rx_buffers_replenish(struct dp_soc *dp_soc, uint32_t mac_id,
				 struct dp_srng *dp_rxdma_srng,
				 struct rx_desc_pool *rx_desc_pool,
				 uint32_t num_req_buffers,
				 union dp_rx_desc_list_elem_t **desc_list,
				 union dp_rx_desc_list_elem_t **tail);

/**
 * dp_rx_link_desc_return() - Return a MPDU link descriptor to HW
 *			      (WBM), following error handling
 *
 * @soc: core DP main context
 * @buf_addr_info: opaque pointer to the REO error ring descriptor
 * @buf_addr_info: void pointer to the buffer_addr_info
 * @bm_action: put to idle_list or release to msdu_list
 * Return: QDF_STATUS
 */
QDF_STATUS
dp_rx_link_desc_return(struct dp_soc *soc, void *ring_desc, uint8_t bm_action);

QDF_STATUS
dp_rx_link_desc_buf_return(struct dp_soc *soc, struct dp_srng *dp_rxdma_srng,
				void *buf_addr_info, uint8_t bm_action);
/**
 * dp_rx_link_desc_return_by_addr - Return a MPDU link descriptor to
 *					(WBM) by address
 *
 * @soc: core DP main context
 * @link_desc_addr: link descriptor addr
 *
 * Return: QDF_STATUS
 */
QDF_STATUS
dp_rx_link_desc_return_by_addr(struct dp_soc *soc, void *link_desc_addr,
					uint8_t bm_action);

uint32_t
dp_rxdma_err_process(struct dp_soc *soc, uint32_t mac_id,
						uint32_t quota);

void dp_rx_fill_mesh_stats(struct dp_vdev *vdev, qdf_nbuf_t nbuf,
				uint8_t *rx_tlv_hdr, struct dp_peer *peer);
QDF_STATUS dp_rx_filter_mesh_packets(struct dp_vdev *vdev, qdf_nbuf_t nbuf,
					uint8_t *rx_tlv_hdr);

int dp_wds_rx_policy_check(uint8_t *rx_tlv_hdr, struct dp_vdev *vdev,
				struct dp_peer *peer, int rx_mcast);

qdf_nbuf_t
dp_rx_nbuf_prepare(struct dp_soc *soc, struct dp_pdev *pdev);

#endif /* _DP_RX_H */