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

/*
 * Copyright (c) 2019 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.
 */

#ifdef WLAN_SUPPORT_RX_FLOW_TAG
#include "dp_types.h"
#include "qdf_mem.h"
#include "qdf_nbuf.h"
#include "cfg_dp.h"
#include "wlan_cfg.h"
#include "dp_types.h"
#include "hal_rx_flow.h"
#include "dp_htt.h"

/**
 * In Hawkeye, a hardware bug disallows SW to only clear a single flow entry
 * when added/deleted by upper layer. Workaround is to clear entire cache,
 * which can have a performance impact. Flow additions/deletions
 * are bundled together over 100ms to save HW cycles if upper layer
 * adds/deletes multiple flows together. Use a longer timeout during setup
 * stage since no flows are anticipated at this time.
 */
#define HW_RX_FSE_CACHE_INVALIDATE_BUNDLE_PERIOD_MS (100)
#define HW_RX_FSE_CACHE_INVALIDATE_DELAYED_FST_SETUP_MS (5000)

/**
 * dp_rx_flow_get_fse() - Obtain flow search entry from flow hash
 * @fst: Rx FST Handle
 * @flow_hash: Computed hash value of flow
 *
 * Return: Handle to flow search table entry
 */
static inline struct dp_rx_fse *
dp_rx_flow_get_fse(struct dp_rx_fst *fst, uint32_t flow_hash)
{
	struct dp_rx_fse *fse;
	uint32_t idx = hal_rx_get_hal_hash(fst->hal_rx_fst, flow_hash);

	fse = (struct dp_rx_fse *)((uint8_t *)fst->base + (idx *
					sizeof(struct dp_rx_fse)));

	return fse;
}

/**
 * dp_rx_flow_dump_flow_entry() - Print flow search entry from 5-tuple
 * @fst: Rx FST Handle
 * @flow_info: Flow 5-tuple
 *
 * Return: None
 */
void dp_rx_flow_dump_flow_entry(struct dp_rx_fst *fst,
				struct cdp_rx_flow_info *flow_info)
{
	dp_info("Dest IP address %x:%x:%x:%x",
		flow_info->flow_tuple_info.dest_ip_127_96,
		flow_info->flow_tuple_info.dest_ip_95_64,
		flow_info->flow_tuple_info.dest_ip_63_32,
		flow_info->flow_tuple_info.dest_ip_31_0);
	dp_info("Source IP address %x:%x:%x:%x",
		flow_info->flow_tuple_info.src_ip_127_96,
		flow_info->flow_tuple_info.src_ip_95_64,
		flow_info->flow_tuple_info.src_ip_63_32,
		flow_info->flow_tuple_info.src_ip_31_0);
	dp_info("Dest port %u, Src Port %u, Protocol %u",
		flow_info->flow_tuple_info.dest_port,
		flow_info->flow_tuple_info.src_port,
		flow_info->flow_tuple_info.l4_protocol);
}

/**
 * dp_rx_flow_compute_flow_hash() - Print flow search entry from 5-tuple
 * @fst: Rx FST Handle
 * @rx_flow_info: DP Rx Flow 5-tuple programmed by upper layer
 * @flow: HAL (HW) flow entry
 *
 * Return: Computed Toeplitz hash
 */
uint32_t dp_rx_flow_compute_flow_hash(struct dp_rx_fst *fst,
				      struct cdp_rx_flow_info *rx_flow_info,
				      struct hal_rx_flow *flow)
{
	flow->tuple_info.dest_ip_127_96 =
			rx_flow_info->flow_tuple_info.dest_ip_127_96;
	flow->tuple_info.dest_ip_95_64 =
			rx_flow_info->flow_tuple_info.dest_ip_95_64;
	flow->tuple_info.dest_ip_63_32 =
			rx_flow_info->flow_tuple_info.dest_ip_63_32;
	flow->tuple_info.dest_ip_31_0 =
			rx_flow_info->flow_tuple_info.dest_ip_31_0;
	flow->tuple_info.src_ip_127_96 =
			rx_flow_info->flow_tuple_info.src_ip_127_96;
	flow->tuple_info.src_ip_95_64 =
			rx_flow_info->flow_tuple_info.src_ip_95_64;
	flow->tuple_info.src_ip_63_32 =
			rx_flow_info->flow_tuple_info.src_ip_63_32;
	flow->tuple_info.src_ip_31_0 =
			rx_flow_info->flow_tuple_info.src_ip_31_0;
	flow->tuple_info.dest_port =
			rx_flow_info->flow_tuple_info.dest_port;
	flow->tuple_info.src_port =
			rx_flow_info->flow_tuple_info.src_port;
	flow->tuple_info.l4_protocol =
			rx_flow_info->flow_tuple_info.l4_protocol;

	return hal_flow_toeplitz_hash(fst->hal_rx_fst, flow);
}

/**
 * dp_rx_flow_alloc_entry() - Create DP and HAL flow entries in FST
 * @fst: Rx FST Handle
 * @rx_flow_info: DP Rx Flow 5-tuple to be added to DP FST
 * @flow: HAL (HW) flow entry that is created
 *
 * Return: Computed Toeplitz hash
 */
struct dp_rx_fse *dp_rx_flow_alloc_entry(struct dp_rx_fst *fst,
					 struct cdp_rx_flow_info *rx_flow_info,
					 struct hal_rx_flow *flow)
{
	struct dp_rx_fse *fse = NULL;
	uint32_t flow_hash;
	uint32_t flow_idx;
	QDF_STATUS status;

	flow_hash = dp_rx_flow_compute_flow_hash(fst, rx_flow_info, flow);

	status = hal_rx_insert_flow_entry(fst->hal_rx_fst,
					  flow_hash,
					  &rx_flow_info->flow_tuple_info,
					  &flow_idx);
	if (status != QDF_STATUS_SUCCESS) {
		dp_err("Add entry failed with status %d for tuple with hash %u",
		       status, flow_hash);
		return NULL;
	}

	fse = dp_rx_flow_get_fse(fst, flow_idx);
	fse->is_ipv4_addr_entry = rx_flow_info->is_addr_ipv4;
	fse->flow_hash = flow_hash;
	fse->flow_id = flow_idx;
	fse->stats.msdu_count = 0;
	fse->is_valid = true;

	return fse;
}

/**
 * dp_rx_flow_find_entry_by_tuple() - Find the DP FSE matching a given 5-tuple
 * @fst: Rx FST Handle
 * @rx_flow_info: DP Rx Flow 5-tuple
 * @flow: Pointer to the  HAL (HW) flow entry
 *
 * Return: Pointer to the DP FSE entry
 */
struct dp_rx_fse *
dp_rx_flow_find_entry_by_tuple(struct dp_rx_fst *fst,
			       struct cdp_rx_flow_info *rx_flow_info,
			       struct hal_rx_flow *flow)
{
	uint32_t flow_hash;
	uint32_t flow_idx;
	QDF_STATUS status;

	flow_hash = dp_rx_flow_compute_flow_hash(fst, rx_flow_info, flow);

	status = hal_rx_find_flow_from_tuple(fst->hal_rx_fst,
					     flow_hash,
					     &rx_flow_info->flow_tuple_info,
					     &flow_idx);
	if (status != QDF_STATUS_SUCCESS) {
		dp_err("Could not find tuple with hash %u", flow_hash);
		dp_rx_flow_dump_flow_entry(fst, rx_flow_info);
		return NULL;
	}
	return dp_rx_flow_get_fse(fst, flow_idx);
}

/**
 * dp_rx_flow_find_entry_by_flowid() - Find DP FSE matching a given flow index
 * @fst: Rx FST Handle
 * @flow_id: Flow index of the requested flow
 *
 * Return: Pointer to the DP FSE entry
 */
struct dp_rx_fse *
dp_rx_flow_find_entry_by_flowid(struct dp_rx_fst *fst,
				uint32_t flow_id)
{
	struct dp_rx_fse *fse = NULL;

	fse = dp_rx_flow_get_fse(fst, flow_id);
	if (!fse->is_valid)
		return NULL;

	dp_info("flow_idx= %d, flow_addr = %pK", flow_id, fse);
	qdf_assert_always(fse->flow_id == flow_id);

	return fse;
}

/**
 * dp_rx_flow_send_htt_operation_cmd() - Send HTT FSE command to FW for flow
 *					 addition/removal
 * @pdev: Pdev instance
 * @op: Add/delete operation
 * @info: DP Flow parameters of the flow added/deleted
 *
 * Return: Success on sending HTT command to FW, error on failure
 */
QDF_STATUS dp_rx_flow_send_htt_operation_cmd(struct dp_pdev *pdev,
					     enum dp_htt_flow_fst_operation op,
					     struct cdp_rx_flow_info *info)
{
	struct dp_htt_rx_flow_fst_operation fst_op;
	struct wlan_cfg_dp_soc_ctxt *cfg = pdev->soc->wlan_cfg_ctx;

	qdf_mem_set(&fst_op, 0, sizeof(struct dp_htt_rx_flow_fst_operation));

	if (qdf_unlikely(wlan_cfg_is_rx_flow_search_table_per_pdev(cfg))) {
		/* Firmware pdev ID starts from 1 */
		fst_op.pdev_id = DP_SW2HW_MACID(pdev->pdev_id);
	} else {
		fst_op.pdev_id = 0;
	}

	fst_op.op_code = op;
	fst_op.rx_flow = info;

	return dp_htt_rx_flow_fse_operation(pdev, &fst_op);
}

/**
 * dp_rx_flow_add_entry() - Add a flow entry to flow search table
 * @pdev: DP pdev instance
 * @rx_flow_info: DP flow paramaters
 *
 * Return: Success when flow is added, no-memory or already exists on error
 */
QDF_STATUS dp_rx_flow_add_entry(struct dp_pdev *pdev,
				struct cdp_rx_flow_info *rx_flow_info)
{
	struct hal_rx_flow flow = { 0 };
	struct dp_rx_fse *fse;
	struct dp_soc *soc = pdev->soc;
	struct dp_rx_fst *fst;

	fst = pdev->rx_fst;

	/* Initialize unused bits in IPv6 address for IPv4 address */
	if (rx_flow_info->is_addr_ipv4) {
		rx_flow_info->flow_tuple_info.dest_ip_63_32 = 0;
		rx_flow_info->flow_tuple_info.dest_ip_95_64 = 0;
		rx_flow_info->flow_tuple_info.dest_ip_127_96 =
			HAL_IP_DA_SA_PREFIX_IPV4_COMPATIBLE_IPV6;

		rx_flow_info->flow_tuple_info.src_ip_63_32 = 0;
		rx_flow_info->flow_tuple_info.src_ip_95_64 = 0;
		rx_flow_info->flow_tuple_info.src_ip_127_96 =
			HAL_IP_DA_SA_PREFIX_IPV4_COMPATIBLE_IPV6;
	}

	/* Allocate entry in DP FST */
	fse = dp_rx_flow_alloc_entry(fst, rx_flow_info, &flow);
	if (NULL == fse) {
		dp_err("RX FSE alloc failed");
		dp_rx_flow_dump_flow_entry(fst, rx_flow_info);
		return QDF_STATUS_E_NOMEM;
	}
	dp_info("flow_addr = %pK, flow_id = %u, valid = %d, v4 = %d\n",
		fse, fse->flow_id, fse->is_valid, fse->is_ipv4_addr_entry);

	/* Initialize other parameters for HW flow & populate HW FSE entry */
	flow.reo_destination_indication = (fse->flow_hash &
				HAL_REO_DEST_IND_HASH_MASK);

	/**
	 * Reo destination of each flow is mapped to match the same used
	 * by RX Hash algorithm. If RX Hash is disabled, then the REO
	 * destination below is directly got from pdev, rather than using
	 * dp_peer_setup_get_reo_hash since we do not have vdev handle here.
	 */
	if (wlan_cfg_is_rx_hash_enabled(soc->wlan_cfg_ctx)) {
		flow.reo_destination_indication |=
			HAL_REO_DEST_IND_START_OFFSET;
	} else {
		flow.reo_destination_indication = pdev->reo_dest;
	}

	flow.reo_destination_handler = HAL_RX_FSE_REO_DEST_FT;
	flow.fse_metadata = rx_flow_info->fse_metadata;
	fse->hal_rx_fse = hal_rx_flow_setup_fse(fst->hal_rx_fst,
						fse->flow_id, &flow);
	if (qdf_unlikely(!fse->hal_rx_fse)) {
		dp_err("Unable to alloc FSE entry");
		dp_rx_flow_dump_flow_entry(fst, rx_flow_info);
		/* Free up the FSE entry as returning failure */
		fse->is_valid = false;
		return QDF_STATUS_E_EXISTS;
	}

	/* Increment number of valid entries in table */
	fst->num_entries++;
	dp_info("FST num_entries = %d, reo_dest_ind = %d, reo_dest_hand = %u",
		fst->num_entries, flow.reo_destination_indication,
		flow.reo_destination_handler);

	if (soc->is_rx_fse_full_cache_invalidate_war_enabled) {
		qdf_atomic_set(&fst->is_cache_update_pending, 1);
	} else {
		QDF_STATUS status;
		/**
		 * Send HTT cache invalidation command to firmware to
		 * reflect the added flow
		 */
		status = dp_rx_flow_send_htt_operation_cmd(
					pdev,
					DP_HTT_FST_CACHE_INVALIDATE_ENTRY,
					rx_flow_info);

		if (QDF_STATUS_SUCCESS != status) {
			dp_err("Send cache invalidate entry to fw failed: %u",
			       status);
			dp_rx_flow_dump_flow_entry(fst, rx_flow_info);
			/* Free DP FSE and HAL FSE */
			hal_rx_flow_delete_entry(fst->hal_rx_fst,
						 fse->hal_rx_fse);
			fse->is_valid = false;
			return status;
		}
	}

	return QDF_STATUS_SUCCESS;
}

/**
 * dp_rx_flow_delete_entry() - Delete a flow entry from flow search table
 * @pdev: pdev handle
 * @rx_flow_info: DP flow parameters
 *
 * Return: Success when flow is deleted, error on failure
 */
QDF_STATUS dp_rx_flow_delete_entry(struct dp_pdev *pdev,
				   struct cdp_rx_flow_info *rx_flow_info)
{
	struct hal_rx_flow flow = { 0 };
	struct dp_rx_fse *fse;
	struct dp_soc *soc = pdev->soc;
	struct dp_rx_fst *fst;
	QDF_STATUS status;

	fst = pdev->rx_fst;

	/* Find the given flow entry DP FST */
	fse = dp_rx_flow_find_entry_by_tuple(fst, rx_flow_info, &flow);
	if (!fse) {
		dp_err("RX flow delete entry failed");
		dp_rx_flow_dump_flow_entry(fst, rx_flow_info);
		return QDF_STATUS_E_INVAL;
	}

	/* Delete the FSE in HW FST */
	status = hal_rx_flow_delete_entry(fst->hal_rx_fst, fse->hal_rx_fse);
	qdf_assert_always(status == QDF_STATUS_SUCCESS);

	/* Free the FSE in DP FST */
	fse->is_valid = false;

	/* Decrement number of valid entries in table */
	fst->num_entries--;

	if (soc->is_rx_fse_full_cache_invalidate_war_enabled) {
		qdf_atomic_set(&fst->is_cache_update_pending, 1);
	} else {
		/**
		 * Send HTT cache invalidation command to firmware
		 * to reflect the deleted flow
		 */
		status = dp_rx_flow_send_htt_operation_cmd(
					pdev,
					DP_HTT_FST_CACHE_INVALIDATE_ENTRY,
					rx_flow_info);

		if (QDF_STATUS_SUCCESS != status) {
			dp_err("Send cache invalidate entry to fw failed: %u",
			       status);
			dp_rx_flow_dump_flow_entry(fst, rx_flow_info);
			/* Do not add entry back in DP FSE and HAL FSE */
			return status;
		}
	}

	return QDF_STATUS_SUCCESS;
}

/* dp_rx_flow_update_fse_stats() - Update a flow's statistics
 * @pdev: pdev handle
 * @flow_id: flow index (truncated hash) in the Rx FST
 *
 * Return: Success when flow statistcs is updated, error on failure
 */
QDF_STATUS dp_rx_flow_update_fse_stats(struct dp_pdev *pdev, uint32_t flow_id)
{
	struct dp_rx_fse *fse;

	fse = dp_rx_flow_find_entry_by_flowid(pdev->rx_fst, flow_id);

	if (NULL == fse) {
		dp_err("Flow not found, flow ID %u", flow_id);
		return QDF_STATUS_E_NOENT;
	}

	fse->stats.msdu_count += 1;
	return QDF_STATUS_SUCCESS;
}

/**
 * dp_rx_flow_get_fse_stats() - Fetch a flow's stats based on DP flow parameter
 * @pdev: pdev handle
 * @rx_flow_info: Pointer to the DP flow struct of the requested flow
 * @stats: Matching flow's stats returned to caller
 *
 * Return: Success when flow statistcs is updated, error on failure
 */
QDF_STATUS dp_rx_flow_get_fse_stats(struct dp_pdev *pdev,
				    struct cdp_rx_flow_info *rx_flow_info,
				    struct cdp_flow_stats *stats)
{
	struct dp_rx_fst *fst;
	struct dp_rx_fse *fse;
	struct hal_rx_flow flow;

	fst = pdev->rx_fst;

	/* Find the given flow entry DP FST */
	fse = dp_rx_flow_find_entry_by_tuple(fst, rx_flow_info, &flow);
	if (!fse) {
		dp_err("RX flow entry search failed");
		dp_rx_flow_dump_flow_entry(fst, rx_flow_info);
		return QDF_STATUS_E_INVAL;
	}

	stats->msdu_count = fse->stats.msdu_count;
	return QDF_STATUS_SUCCESS;
}

/**
 * dp_rx_flow_cache_invalidate_timer_handler() - Timer handler used for bundling
 * flows before invalidating entire cache
 * @ctx: Pdev handle
 *
 * Return: None
 */
void dp_rx_flow_cache_invalidate_timer_handler(void *ctx)
{
	struct dp_pdev *pdev = (struct dp_pdev *)ctx;
	struct dp_rx_fst *fst;
	bool is_update_pending;
	QDF_STATUS status;

	fst = pdev->rx_fst;

	qdf_assert_always(fst);
	is_update_pending = qdf_atomic_read(&fst->is_cache_update_pending);
	qdf_atomic_set(&fst->is_cache_update_pending, 0);

	if (is_update_pending) {
		/* Send full cache invalidate command to firmware */
		status = dp_rx_flow_send_htt_operation_cmd(
				pdev,
				DP_HTT_FST_CACHE_INVALIDATE_FULL,
				NULL);

		if (QDF_STATUS_SUCCESS != status)
			dp_err("Send full cache inv to fw failed: %u", status);
	}

	qdf_timer_start(&fst->cache_invalidate_timer,
			HW_RX_FSE_CACHE_INVALIDATE_BUNDLE_PERIOD_MS);
}

/**
 * dp_rx_fst_attach() - Initialize Rx FST and setup necessary parameters
 * @soc: SoC handle
 * @pdev: Pdev handle
 *
 * Return: Handle to flow search table entry
 */
QDF_STATUS dp_rx_fst_attach(struct dp_soc *soc, struct dp_pdev *pdev)
{
	struct dp_rx_fst *fst;
	uint8_t *hash_key;
	struct wlan_cfg_dp_soc_ctxt *cfg = soc->wlan_cfg_ctx;
	bool is_rx_flow_search_table_per_pdev =
		wlan_cfg_is_rx_flow_search_table_per_pdev(cfg);

	if (qdf_unlikely(!wlan_cfg_is_rx_flow_tag_enabled(cfg))) {
		dp_err("RX Flow tag feature disabled");
		return QDF_STATUS_E_NOSUPPORT;
	}

	if (!wlan_psoc_nif_fw_ext_cap_get((void *)pdev->ctrl_pdev,
					  WLAN_SOC_CEXT_RX_FSE_SUPPORT)) {
		QDF_TRACE(QDF_MODULE_ID_ANY, QDF_TRACE_LEVEL_ERROR,
			  "rx fse disabled in FW\n");
		wlan_cfg_set_rx_flow_tag_enabled(cfg, false);
		return QDF_STATUS_E_NOSUPPORT;
	}
	/**
	 * Func. is called for every pdev. If FST is per SOC, then return
	 * if it was already called once.
	 */
	if (!is_rx_flow_search_table_per_pdev && soc->rx_fst) {
		pdev->rx_fst = soc->rx_fst;
		QDF_TRACE(QDF_MODULE_ID_ANY, QDF_TRACE_LEVEL_ERROR,
			  "RX FST for SoC is already initialized");
		return QDF_STATUS_SUCCESS;
	}

	/**
	 * Func. is called for this pdev already. This is an error.
	 * Return failure
	 */
	if (is_rx_flow_search_table_per_pdev && pdev->rx_fst) {
		QDF_TRACE(QDF_MODULE_ID_ANY, QDF_TRACE_LEVEL_ERROR,
			  "RX FST for PDEV %u is already initialized",
			  pdev->pdev_id);
		return QDF_STATUS_E_EXISTS;
	}

	fst = qdf_mem_malloc(sizeof(struct dp_rx_fst));
	if (!fst) {
		QDF_TRACE(QDF_MODULE_ID_ANY, QDF_TRACE_LEVEL_ERROR,
			  "RX FST allocation failed\n");
		return QDF_STATUS_E_NOMEM;
	}

	qdf_mem_set(fst, 0, sizeof(struct dp_rx_fst));

	fst->max_skid_length = wlan_cfg_rx_fst_get_max_search(cfg);
	fst->max_entries = wlan_cfg_get_rx_flow_search_table_size(cfg);
	hash_key = wlan_cfg_rx_fst_get_hash_key(cfg);

	if (!(fst->max_entries &&
	      (!(fst->max_entries & (fst->max_entries - 1))))) {
		uint32_t next_power_of_2 = fst->max_entries - 1;

		next_power_of_2 |= (next_power_of_2 >> 1);
		next_power_of_2 |= (next_power_of_2 >> 2);
		next_power_of_2 |= (next_power_of_2 >> 4);
		next_power_of_2 |= (next_power_of_2 >> 8);
		next_power_of_2 |= (next_power_of_2 >> 16);
		next_power_of_2++;
		if (next_power_of_2 > WLAN_CFG_RX_FLOW_SEARCH_TABLE_SIZE_MAX)
			next_power_of_2 =
				 WLAN_CFG_RX_FLOW_SEARCH_TABLE_SIZE_MAX;
		dp_info("Num entries in cfg is not a ^2:%u, using next ^2:%u",
			fst->max_entries, next_power_of_2);
		fst->max_entries = next_power_of_2;
	}
	fst->hash_mask = fst->max_entries - 1;
	fst->num_entries = 0;

	fst->base = (uint8_t *) qdf_mem_malloc(sizeof(struct dp_rx_fse) *
					       fst->max_entries);

	if (!fst->base) {
		QDF_TRACE(QDF_MODULE_ID_ANY, QDF_TRACE_LEVEL_ERROR,
			  "Rx fst->base allocation failed, #entries:%d\n",
			  fst->max_entries);

		qdf_mem_free(fst);
		return QDF_STATUS_E_NOMEM;
	}

	qdf_mem_set((uint8_t *)fst->base, 0,
		    (sizeof(struct dp_rx_fse) * fst->max_entries));

	fst->hal_rx_fst = hal_rx_fst_attach(
				soc->osdev,
				&fst->hal_rx_fst_base_paddr,
				fst->max_entries,
				fst->max_skid_length,
				hash_key);

	if (qdf_unlikely(!fst->hal_rx_fst)) {
		QDF_TRACE(QDF_MODULE_ID_ANY, QDF_TRACE_LEVEL_ERROR,
			  "Rx Hal fst allocation failed, #entries:%d\n",
			  fst->max_entries);
		qdf_mem_free(fst->base);
		qdf_mem_free(fst);
		return QDF_STATUS_E_NOMEM;
	}
	if (!is_rx_flow_search_table_per_pdev)
		soc->rx_fst = fst;

	pdev->rx_fst = fst;

	if (soc->is_rx_fse_full_cache_invalidate_war_enabled) {
		QDF_STATUS status;

		status = qdf_timer_init(
				soc->osdev,
				&fst->cache_invalidate_timer,
				dp_rx_flow_cache_invalidate_timer_handler,
				(void *)pdev,
				QDF_TIMER_TYPE_SW);

		qdf_assert_always(status == QDF_STATUS_SUCCESS);

		/* Start the timer */
		qdf_timer_start(
			&fst->cache_invalidate_timer,
			HW_RX_FSE_CACHE_INVALIDATE_DELAYED_FST_SETUP_MS);

		qdf_atomic_set(&fst->is_cache_update_pending, false);
	}

	QDF_TRACE(QDF_MODULE_ID_ANY, QDF_TRACE_LEVEL_INFO,
		  "Rx FST attach successful, #entries:%d\n",
		  fst->max_entries);
	return QDF_STATUS_SUCCESS;
}

/**
 * dp_rx_fst_detach() - De-initialize Rx FST
 * @soc: SoC handle
 * @pdev: Pdev handle
 *
 * Return: None
 */
void dp_rx_fst_detach(struct dp_soc *soc, struct dp_pdev *pdev)
{
	struct dp_rx_fst *dp_fst;
	struct wlan_cfg_dp_soc_ctxt *cfg = soc->wlan_cfg_ctx;

	if (qdf_unlikely(wlan_cfg_is_rx_flow_search_table_per_pdev(cfg))) {
		dp_fst = pdev->rx_fst;
		pdev->rx_fst = NULL;
	} else {
		dp_fst = soc->rx_fst;
		soc->rx_fst = NULL;
	}

	if (qdf_likely(dp_fst)) {
		hal_rx_fst_detach(dp_fst->hal_rx_fst, soc->osdev);
		if (soc->is_rx_fse_full_cache_invalidate_war_enabled) {
			qdf_timer_sync_cancel(&dp_fst->cache_invalidate_timer);
			qdf_timer_stop(&dp_fst->cache_invalidate_timer);
			qdf_timer_free(&dp_fst->cache_invalidate_timer);
		}
		qdf_mem_free(dp_fst->base);
		qdf_mem_free(dp_fst);
	}
	QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_DEBUG,
		  "Rx FST detached for pdev %u\n", pdev->pdev_id);
}

/**
 * dp_rx_flow_send_fst_fw_setup() - Program FST parameters in FW/HW post-attach
 * @soc: SoC handle
 * @pdev: Pdev handle
 *
 * Return: Success when fst parameters are programmed in FW, error otherwise
 */
QDF_STATUS dp_rx_flow_send_fst_fw_setup(struct dp_soc *soc,
					struct dp_pdev *pdev)
{
	struct dp_htt_rx_flow_fst_setup fst_setup;
	struct dp_rx_fst *fst;
	QDF_STATUS status;
	struct wlan_cfg_dp_soc_ctxt *cfg = soc->wlan_cfg_ctx;

	if (qdf_unlikely(!wlan_cfg_is_rx_flow_tag_enabled(cfg)))
		return QDF_STATUS_SUCCESS;

	qdf_mem_set(&fst_setup, 0, sizeof(struct dp_htt_rx_flow_fst_setup));

	if (qdf_unlikely(wlan_cfg_is_rx_flow_search_table_per_pdev(cfg))) {
		/* Firmware pdev ID starts from 1 */
		fst_setup.pdev_id = DP_SW2HW_MACID(pdev->pdev_id);
		fst = pdev->rx_fst;
	} else {
		fst_setup.pdev_id = 0;
		fst = soc->rx_fst;
	}
	fst_setup.max_entries = fst->max_entries;
	fst_setup.max_search = fst->max_skid_length;
	fst_setup.base_addr_lo = (uint32_t)fst->hal_rx_fst_base_paddr;
	fst_setup.base_addr_hi =
		(uint32_t)((uint64_t)fst->hal_rx_fst_base_paddr >> 32);
	fst_setup.ip_da_sa_prefix =
		HAL_FST_IP_DA_SA_PFX_TYPE_IPV4_COMPATIBLE_IPV6;
	fst_setup.hash_key =  wlan_cfg_rx_fst_get_hash_key(cfg);
	fst_setup.hash_key_len = HAL_FST_HASH_KEY_SIZE_BYTES;

	status = dp_htt_rx_flow_fst_setup(pdev, &fst_setup);
	if (status == QDF_STATUS_SUCCESS) {
		fst->fse_setup_done = true;
		return status;
	}
	QDF_TRACE(QDF_MODULE_ID_ANY, QDF_TRACE_LEVEL_ERROR,
		  "Failed to send Rx FSE Setup pdev%d status %d\n",
		  pdev->pdev_id, status);
	/* Free all the memory allocations and data structures */
	dp_rx_fst_detach(pdev->soc, pdev);
	return status;
}
#endif /* WLAN_SUPPORT_RX_FLOW_TAG */