htt_rx.c 64.8 KB
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/*
 * Copyright (c) 2005-2011 Atheros Communications Inc.
 * Copyright (c) 2011-2013 Qualcomm Atheros, Inc.
 *
 * 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.
 */

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#include "core.h"
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#include "htc.h"
#include "htt.h"
#include "txrx.h"
#include "debug.h"
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#include "trace.h"
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#include "mac.h"
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#include <linux/log2.h>

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#define HTT_RX_RING_SIZE HTT_RX_RING_SIZE_MAX
#define HTT_RX_RING_FILL_LEVEL (((HTT_RX_RING_SIZE) / 2) - 1)
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/* when under memory pressure rx ring refill may fail and needs a retry */
#define HTT_RX_RING_REFILL_RETRY_MS 50

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static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb);
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static void ath10k_htt_txrx_compl_task(unsigned long ptr);
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static struct sk_buff *
ath10k_htt_rx_find_skb_paddr(struct ath10k *ar, u32 paddr)
{
	struct ath10k_skb_rxcb *rxcb;

	hash_for_each_possible(ar->htt.rx_ring.skb_table, rxcb, hlist, paddr)
		if (rxcb->paddr == paddr)
			return ATH10K_RXCB_SKB(rxcb);

	WARN_ON_ONCE(1);
	return NULL;
}

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static void ath10k_htt_rx_ring_free(struct ath10k_htt *htt)
{
	struct sk_buff *skb;
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	struct ath10k_skb_rxcb *rxcb;
	struct hlist_node *n;
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	int i;

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	if (htt->rx_ring.in_ord_rx) {
		hash_for_each_safe(htt->rx_ring.skb_table, i, n, rxcb, hlist) {
			skb = ATH10K_RXCB_SKB(rxcb);
			dma_unmap_single(htt->ar->dev, rxcb->paddr,
					 skb->len + skb_tailroom(skb),
					 DMA_FROM_DEVICE);
			hash_del(&rxcb->hlist);
			dev_kfree_skb_any(skb);
		}
	} else {
		for (i = 0; i < htt->rx_ring.size; i++) {
			skb = htt->rx_ring.netbufs_ring[i];
			if (!skb)
				continue;

			rxcb = ATH10K_SKB_RXCB(skb);
			dma_unmap_single(htt->ar->dev, rxcb->paddr,
					 skb->len + skb_tailroom(skb),
					 DMA_FROM_DEVICE);
			dev_kfree_skb_any(skb);
		}
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	}

	htt->rx_ring.fill_cnt = 0;
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	hash_init(htt->rx_ring.skb_table);
	memset(htt->rx_ring.netbufs_ring, 0,
	       htt->rx_ring.size * sizeof(htt->rx_ring.netbufs_ring[0]));
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}

static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
{
	struct htt_rx_desc *rx_desc;
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	struct ath10k_skb_rxcb *rxcb;
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	struct sk_buff *skb;
	dma_addr_t paddr;
	int ret = 0, idx;

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	/* The Full Rx Reorder firmware has no way of telling the host
	 * implicitly when it copied HTT Rx Ring buffers to MAC Rx Ring.
	 * To keep things simple make sure ring is always half empty. This
	 * guarantees there'll be no replenishment overruns possible.
	 */
	BUILD_BUG_ON(HTT_RX_RING_FILL_LEVEL >= HTT_RX_RING_SIZE / 2);

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	idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
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	while (num > 0) {
		skb = dev_alloc_skb(HTT_RX_BUF_SIZE + HTT_RX_DESC_ALIGN);
		if (!skb) {
			ret = -ENOMEM;
			goto fail;
		}

		if (!IS_ALIGNED((unsigned long)skb->data, HTT_RX_DESC_ALIGN))
			skb_pull(skb,
				 PTR_ALIGN(skb->data, HTT_RX_DESC_ALIGN) -
				 skb->data);

		/* Clear rx_desc attention word before posting to Rx ring */
		rx_desc = (struct htt_rx_desc *)skb->data;
		rx_desc->attention.flags = __cpu_to_le32(0);

		paddr = dma_map_single(htt->ar->dev, skb->data,
				       skb->len + skb_tailroom(skb),
				       DMA_FROM_DEVICE);

		if (unlikely(dma_mapping_error(htt->ar->dev, paddr))) {
			dev_kfree_skb_any(skb);
			ret = -ENOMEM;
			goto fail;
		}

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		rxcb = ATH10K_SKB_RXCB(skb);
		rxcb->paddr = paddr;
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		htt->rx_ring.netbufs_ring[idx] = skb;
		htt->rx_ring.paddrs_ring[idx] = __cpu_to_le32(paddr);
		htt->rx_ring.fill_cnt++;

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		if (htt->rx_ring.in_ord_rx) {
			hash_add(htt->rx_ring.skb_table,
				 &ATH10K_SKB_RXCB(skb)->hlist,
				 (u32)paddr);
		}

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		num--;
		idx++;
		idx &= htt->rx_ring.size_mask;
	}

fail:
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	/*
	 * Make sure the rx buffer is updated before available buffer
	 * index to avoid any potential rx ring corruption.
	 */
	mb();
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	*htt->rx_ring.alloc_idx.vaddr = __cpu_to_le32(idx);
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	return ret;
}

static int ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
{
	lockdep_assert_held(&htt->rx_ring.lock);
	return __ath10k_htt_rx_ring_fill_n(htt, num);
}

static void ath10k_htt_rx_msdu_buff_replenish(struct ath10k_htt *htt)
{
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	int ret, num_deficit, num_to_fill;
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	/* Refilling the whole RX ring buffer proves to be a bad idea. The
	 * reason is RX may take up significant amount of CPU cycles and starve
	 * other tasks, e.g. TX on an ethernet device while acting as a bridge
	 * with ath10k wlan interface. This ended up with very poor performance
	 * once CPU the host system was overwhelmed with RX on ath10k.
	 *
	 * By limiting the number of refills the replenishing occurs
	 * progressively. This in turns makes use of the fact tasklets are
	 * processed in FIFO order. This means actual RX processing can starve
	 * out refilling. If there's not enough buffers on RX ring FW will not
	 * report RX until it is refilled with enough buffers. This
	 * automatically balances load wrt to CPU power.
	 *
	 * This probably comes at a cost of lower maximum throughput but
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	 * improves the average and stability. */
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	spin_lock_bh(&htt->rx_ring.lock);
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	num_deficit = htt->rx_ring.fill_level - htt->rx_ring.fill_cnt;
	num_to_fill = min(ATH10K_HTT_MAX_NUM_REFILL, num_deficit);
	num_deficit -= num_to_fill;
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	ret = ath10k_htt_rx_ring_fill_n(htt, num_to_fill);
	if (ret == -ENOMEM) {
		/*
		 * Failed to fill it to the desired level -
		 * we'll start a timer and try again next time.
		 * As long as enough buffers are left in the ring for
		 * another A-MPDU rx, no special recovery is needed.
		 */
		mod_timer(&htt->rx_ring.refill_retry_timer, jiffies +
			  msecs_to_jiffies(HTT_RX_RING_REFILL_RETRY_MS));
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	} else if (num_deficit > 0) {
		tasklet_schedule(&htt->rx_replenish_task);
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	}
	spin_unlock_bh(&htt->rx_ring.lock);
}

static void ath10k_htt_rx_ring_refill_retry(unsigned long arg)
{
	struct ath10k_htt *htt = (struct ath10k_htt *)arg;
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	ath10k_htt_rx_msdu_buff_replenish(htt);
}

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int ath10k_htt_rx_ring_refill(struct ath10k *ar)
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{
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	struct ath10k_htt *htt = &ar->htt;
	int ret;
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	spin_lock_bh(&htt->rx_ring.lock);
	ret = ath10k_htt_rx_ring_fill_n(htt, (htt->rx_ring.fill_level -
					      htt->rx_ring.fill_cnt));
	spin_unlock_bh(&htt->rx_ring.lock);
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	if (ret)
		ath10k_htt_rx_ring_free(htt);

	return ret;
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}
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void ath10k_htt_rx_free(struct ath10k_htt *htt)
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{
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	del_timer_sync(&htt->rx_ring.refill_retry_timer);
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	tasklet_kill(&htt->rx_replenish_task);
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	tasklet_kill(&htt->txrx_compl_task);

	skb_queue_purge(&htt->tx_compl_q);
	skb_queue_purge(&htt->rx_compl_q);
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	skb_queue_purge(&htt->rx_in_ord_compl_q);
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	ath10k_htt_rx_ring_free(htt);
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	dma_free_coherent(htt->ar->dev,
			  (htt->rx_ring.size *
			   sizeof(htt->rx_ring.paddrs_ring)),
			  htt->rx_ring.paddrs_ring,
			  htt->rx_ring.base_paddr);

	dma_free_coherent(htt->ar->dev,
			  sizeof(*htt->rx_ring.alloc_idx.vaddr),
			  htt->rx_ring.alloc_idx.vaddr,
			  htt->rx_ring.alloc_idx.paddr);

	kfree(htt->rx_ring.netbufs_ring);
}

static inline struct sk_buff *ath10k_htt_rx_netbuf_pop(struct ath10k_htt *htt)
{
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	struct ath10k *ar = htt->ar;
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	int idx;
	struct sk_buff *msdu;

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	lockdep_assert_held(&htt->rx_ring.lock);
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	if (htt->rx_ring.fill_cnt == 0) {
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		ath10k_warn(ar, "tried to pop sk_buff from an empty rx ring\n");
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		return NULL;
	}
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	idx = htt->rx_ring.sw_rd_idx.msdu_payld;
	msdu = htt->rx_ring.netbufs_ring[idx];
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	htt->rx_ring.netbufs_ring[idx] = NULL;
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	htt->rx_ring.paddrs_ring[idx] = 0;
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	idx++;
	idx &= htt->rx_ring.size_mask;
	htt->rx_ring.sw_rd_idx.msdu_payld = idx;
	htt->rx_ring.fill_cnt--;

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	dma_unmap_single(htt->ar->dev,
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			 ATH10K_SKB_RXCB(msdu)->paddr,
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			 msdu->len + skb_tailroom(msdu),
			 DMA_FROM_DEVICE);
	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
			msdu->data, msdu->len + skb_tailroom(msdu));

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	return msdu;
}

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/* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
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static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
				   u8 **fw_desc, int *fw_desc_len,
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				   struct sk_buff_head *amsdu)
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{
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	struct ath10k *ar = htt->ar;
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	int msdu_len, msdu_chaining = 0;
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	struct sk_buff *msdu;
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	struct htt_rx_desc *rx_desc;

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	lockdep_assert_held(&htt->rx_ring.lock);

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	for (;;) {
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		int last_msdu, msdu_len_invalid, msdu_chained;

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		msdu = ath10k_htt_rx_netbuf_pop(htt);
		if (!msdu) {
			__skb_queue_purge(amsdu);
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			return -ENOENT;
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		}

		__skb_queue_tail(amsdu, msdu);

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

		/* FIXME: we must report msdu payload since this is what caller
		 *        expects now */
		skb_put(msdu, offsetof(struct htt_rx_desc, msdu_payload));
		skb_pull(msdu, offsetof(struct htt_rx_desc, msdu_payload));

		/*
		 * Sanity check - confirm the HW is finished filling in the
		 * rx data.
		 * If the HW and SW are working correctly, then it's guaranteed
		 * that the HW's MAC DMA is done before this point in the SW.
		 * To prevent the case that we handle a stale Rx descriptor,
		 * just assert for now until we have a way to recover.
		 */
		if (!(__le32_to_cpu(rx_desc->attention.flags)
				& RX_ATTENTION_FLAGS_MSDU_DONE)) {
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			__skb_queue_purge(amsdu);
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			return -EIO;
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		}

		/*
		 * Copy the FW rx descriptor for this MSDU from the rx
		 * indication message into the MSDU's netbuf. HL uses the
		 * same rx indication message definition as LL, and simply
		 * appends new info (fields from the HW rx desc, and the
		 * MSDU payload itself). So, the offset into the rx
		 * indication message only has to account for the standard
		 * offset of the per-MSDU FW rx desc info within the
		 * message, and how many bytes of the per-MSDU FW rx desc
		 * info have already been consumed. (And the endianness of
		 * the host, since for a big-endian host, the rx ind
		 * message contents, including the per-MSDU rx desc bytes,
		 * were byteswapped during upload.)
		 */
		if (*fw_desc_len > 0) {
			rx_desc->fw_desc.info0 = **fw_desc;
			/*
			 * The target is expected to only provide the basic
			 * per-MSDU rx descriptors. Just to be sure, verify
			 * that the target has not attached extension data
			 * (e.g. LRO flow ID).
			 */

			/* or more, if there's extension data */
			(*fw_desc)++;
			(*fw_desc_len)--;
		} else {
			/*
			 * When an oversized AMSDU happened, FW will lost
			 * some of MSDU status - in this case, the FW
			 * descriptors provided will be less than the
			 * actual MSDUs inside this MPDU. Mark the FW
			 * descriptors so that it will still deliver to
			 * upper stack, if no CRC error for this MPDU.
			 *
			 * FIX THIS - the FW descriptors are actually for
			 * MSDUs in the end of this A-MSDU instead of the
			 * beginning.
			 */
			rx_desc->fw_desc.info0 = 0;
		}

		msdu_len_invalid = !!(__le32_to_cpu(rx_desc->attention.flags)
					& (RX_ATTENTION_FLAGS_MPDU_LENGTH_ERR |
					   RX_ATTENTION_FLAGS_MSDU_LENGTH_ERR));
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		msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.common.info0),
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			      RX_MSDU_START_INFO0_MSDU_LENGTH);
		msdu_chained = rx_desc->frag_info.ring2_more_count;

		if (msdu_len_invalid)
			msdu_len = 0;

		skb_trim(msdu, 0);
		skb_put(msdu, min(msdu_len, HTT_RX_MSDU_SIZE));
		msdu_len -= msdu->len;

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		/* Note: Chained buffers do not contain rx descriptor */
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		while (msdu_chained--) {
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			msdu = ath10k_htt_rx_netbuf_pop(htt);
			if (!msdu) {
				__skb_queue_purge(amsdu);
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				return -ENOENT;
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			}

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			__skb_queue_tail(amsdu, msdu);
			skb_trim(msdu, 0);
			skb_put(msdu, min(msdu_len, HTT_RX_BUF_SIZE));
			msdu_len -= msdu->len;
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			msdu_chaining = 1;
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		}

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		last_msdu = __le32_to_cpu(rx_desc->msdu_end.common.info0) &
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				RX_MSDU_END_INFO0_LAST_MSDU;

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		trace_ath10k_htt_rx_desc(ar, &rx_desc->attention,
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					 sizeof(*rx_desc) - sizeof(u32));
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		if (last_msdu)
			break;
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	}

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	if (skb_queue_empty(amsdu))
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		msdu_chaining = -1;

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	/*
	 * Don't refill the ring yet.
	 *
	 * First, the elements popped here are still in use - it is not
	 * safe to overwrite them until the matching call to
	 * mpdu_desc_list_next. Second, for efficiency it is preferable to
	 * refill the rx ring with 1 PPDU's worth of rx buffers (something
	 * like 32 x 3 buffers), rather than one MPDU's worth of rx buffers
	 * (something like 3 buffers). Consequently, we'll rely on the txrx
	 * SW to tell us when it is done pulling all the PPDU's rx buffers
	 * out of the rx ring, and then refill it just once.
	 */

	return msdu_chaining;
}

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static void ath10k_htt_rx_replenish_task(unsigned long ptr)
{
	struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
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	ath10k_htt_rx_msdu_buff_replenish(htt);
}

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static struct sk_buff *ath10k_htt_rx_pop_paddr(struct ath10k_htt *htt,
					       u32 paddr)
{
	struct ath10k *ar = htt->ar;
	struct ath10k_skb_rxcb *rxcb;
	struct sk_buff *msdu;

	lockdep_assert_held(&htt->rx_ring.lock);

	msdu = ath10k_htt_rx_find_skb_paddr(ar, paddr);
	if (!msdu)
		return NULL;

	rxcb = ATH10K_SKB_RXCB(msdu);
	hash_del(&rxcb->hlist);
	htt->rx_ring.fill_cnt--;

	dma_unmap_single(htt->ar->dev, rxcb->paddr,
			 msdu->len + skb_tailroom(msdu),
			 DMA_FROM_DEVICE);
	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx netbuf pop: ",
			msdu->data, msdu->len + skb_tailroom(msdu));

	return msdu;
}

static int ath10k_htt_rx_pop_paddr_list(struct ath10k_htt *htt,
					struct htt_rx_in_ord_ind *ev,
					struct sk_buff_head *list)
{
	struct ath10k *ar = htt->ar;
	struct htt_rx_in_ord_msdu_desc *msdu_desc = ev->msdu_descs;
	struct htt_rx_desc *rxd;
	struct sk_buff *msdu;
	int msdu_count;
	bool is_offload;
	u32 paddr;

	lockdep_assert_held(&htt->rx_ring.lock);

	msdu_count = __le16_to_cpu(ev->msdu_count);
	is_offload = !!(ev->info & HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);

	while (msdu_count--) {
		paddr = __le32_to_cpu(msdu_desc->msdu_paddr);

		msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
		if (!msdu) {
			__skb_queue_purge(list);
			return -ENOENT;
		}

		__skb_queue_tail(list, msdu);

		if (!is_offload) {
			rxd = (void *)msdu->data;

			trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));

			skb_put(msdu, sizeof(*rxd));
			skb_pull(msdu, sizeof(*rxd));
			skb_put(msdu, __le16_to_cpu(msdu_desc->msdu_len));

			if (!(__le32_to_cpu(rxd->attention.flags) &
			      RX_ATTENTION_FLAGS_MSDU_DONE)) {
				ath10k_warn(htt->ar, "tried to pop an incomplete frame, oops!\n");
				return -EIO;
			}
		}

		msdu_desc++;
	}

	return 0;
}

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int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
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{
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	struct ath10k *ar = htt->ar;
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	dma_addr_t paddr;
	void *vaddr;
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	size_t size;
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	struct timer_list *timer = &htt->rx_ring.refill_retry_timer;

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	htt->rx_confused = false;

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	/* XXX: The fill level could be changed during runtime in response to
	 * the host processing latency. Is this really worth it?
	 */
	htt->rx_ring.size = HTT_RX_RING_SIZE;
	htt->rx_ring.size_mask = htt->rx_ring.size - 1;
	htt->rx_ring.fill_level = HTT_RX_RING_FILL_LEVEL;

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	if (!is_power_of_2(htt->rx_ring.size)) {
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		ath10k_warn(ar, "htt rx ring size is not power of 2\n");
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		return -EINVAL;
	}

	htt->rx_ring.netbufs_ring =
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		kzalloc(htt->rx_ring.size * sizeof(struct sk_buff *),
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			GFP_KERNEL);
	if (!htt->rx_ring.netbufs_ring)
		goto err_netbuf;

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	size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring);

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	vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
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	if (!vaddr)
		goto err_dma_ring;

	htt->rx_ring.paddrs_ring = vaddr;
	htt->rx_ring.base_paddr = paddr;

	vaddr = dma_alloc_coherent(htt->ar->dev,
				   sizeof(*htt->rx_ring.alloc_idx.vaddr),
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				   &paddr, GFP_KERNEL);
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	if (!vaddr)
		goto err_dma_idx;

	htt->rx_ring.alloc_idx.vaddr = vaddr;
	htt->rx_ring.alloc_idx.paddr = paddr;
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	htt->rx_ring.sw_rd_idx.msdu_payld = htt->rx_ring.size_mask;
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	*htt->rx_ring.alloc_idx.vaddr = 0;

	/* Initialize the Rx refill retry timer */
	setup_timer(timer, ath10k_htt_rx_ring_refill_retry, (unsigned long)htt);

	spin_lock_init(&htt->rx_ring.lock);

	htt->rx_ring.fill_cnt = 0;
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	htt->rx_ring.sw_rd_idx.msdu_payld = 0;
	hash_init(htt->rx_ring.skb_table);
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	tasklet_init(&htt->rx_replenish_task, ath10k_htt_rx_replenish_task,
		     (unsigned long)htt);

569 570
	skb_queue_head_init(&htt->tx_compl_q);
	skb_queue_head_init(&htt->rx_compl_q);
571
	skb_queue_head_init(&htt->rx_in_ord_compl_q);
572 573 574 575

	tasklet_init(&htt->txrx_compl_task, ath10k_htt_txrx_compl_task,
		     (unsigned long)htt);

576
	ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
577 578 579 580 581 582 583 584 585 586 587 588 589 590 591
		   htt->rx_ring.size, htt->rx_ring.fill_level);
	return 0;

err_dma_idx:
	dma_free_coherent(htt->ar->dev,
			  (htt->rx_ring.size *
			   sizeof(htt->rx_ring.paddrs_ring)),
			  htt->rx_ring.paddrs_ring,
			  htt->rx_ring.base_paddr);
err_dma_ring:
	kfree(htt->rx_ring.netbufs_ring);
err_netbuf:
	return -ENOMEM;
}

592 593
static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
					  enum htt_rx_mpdu_encrypt_type type)
594 595
{
	switch (type) {
596 597
	case HTT_RX_MPDU_ENCRYPT_NONE:
		return 0;
598 599
	case HTT_RX_MPDU_ENCRYPT_WEP40:
	case HTT_RX_MPDU_ENCRYPT_WEP104:
600
		return IEEE80211_WEP_IV_LEN;
601 602
	case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
	case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
603
		return IEEE80211_TKIP_IV_LEN;
604
	case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
605 606 607 608
		return IEEE80211_CCMP_HDR_LEN;
	case HTT_RX_MPDU_ENCRYPT_WEP128:
	case HTT_RX_MPDU_ENCRYPT_WAPI:
		break;
609 610
	}

611
	ath10k_warn(ar, "unsupported encryption type %d\n", type);
612 613 614
	return 0;
}

615 616
#define MICHAEL_MIC_LEN 8

617 618
static int ath10k_htt_rx_crypto_tail_len(struct ath10k *ar,
					 enum htt_rx_mpdu_encrypt_type type)
619 620 621
{
	switch (type) {
	case HTT_RX_MPDU_ENCRYPT_NONE:
622
		return 0;
623 624
	case HTT_RX_MPDU_ENCRYPT_WEP40:
	case HTT_RX_MPDU_ENCRYPT_WEP104:
625
		return IEEE80211_WEP_ICV_LEN;
626 627
	case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
	case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
628
		return IEEE80211_TKIP_ICV_LEN;
629
	case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
630 631 632 633
		return IEEE80211_CCMP_MIC_LEN;
	case HTT_RX_MPDU_ENCRYPT_WEP128:
	case HTT_RX_MPDU_ENCRYPT_WAPI:
		break;
634 635
	}

636
	ath10k_warn(ar, "unsupported encryption type %d\n", type);
637 638 639
	return 0;
}

640 641 642 643 644 645
struct amsdu_subframe_hdr {
	u8 dst[ETH_ALEN];
	u8 src[ETH_ALEN];
	__be16 len;
} __packed;

646 647
#define GROUP_ID_IS_SU_MIMO(x) ((x) == 0 || (x) == 63)

648
static void ath10k_htt_rx_h_rates(struct ath10k *ar,
649 650
				  struct ieee80211_rx_status *status,
				  struct htt_rx_desc *rxd)
651
{
652 653
	struct ieee80211_supported_band *sband;
	u8 cck, rate, bw, sgi, mcs, nss;
654
	u8 preamble = 0;
655
	u8 group_id;
656
	u32 info1, info2, info3;
657

658 659 660 661 662
	info1 = __le32_to_cpu(rxd->ppdu_start.info1);
	info2 = __le32_to_cpu(rxd->ppdu_start.info2);
	info3 = __le32_to_cpu(rxd->ppdu_start.info3);

	preamble = MS(info1, RX_PPDU_START_INFO1_PREAMBLE_TYPE);
663 664 665

	switch (preamble) {
	case HTT_RX_LEGACY:
666 667 668 669 670 671
		/* To get legacy rate index band is required. Since band can't
		 * be undefined check if freq is non-zero.
		 */
		if (!status->freq)
			return;

672 673
		cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT;
		rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE);
674
		rate &= ~RX_PPDU_START_RATE_FLAG;
675

676
		sband = &ar->mac.sbands[status->band];
677
		status->rate_idx = ath10k_mac_hw_rate_to_idx(sband, rate, cck);
678 679 680
		break;
	case HTT_RX_HT:
	case HTT_RX_HT_WITH_TXBF:
681 682
		/* HT-SIG - Table 20-11 in info2 and info3 */
		mcs = info2 & 0x1F;
683
		nss = mcs >> 3;
684 685
		bw = (info2 >> 7) & 1;
		sgi = (info3 >> 7) & 1;
686 687 688 689 690 691 692 693 694 695

		status->rate_idx = mcs;
		status->flag |= RX_FLAG_HT;
		if (sgi)
			status->flag |= RX_FLAG_SHORT_GI;
		if (bw)
			status->flag |= RX_FLAG_40MHZ;
		break;
	case HTT_RX_VHT:
	case HTT_RX_VHT_WITH_TXBF:
696
		/* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3
697
		   TODO check this */
698 699
		bw = info2 & 3;
		sgi = info3 & 1;
700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718
		group_id = (info2 >> 4) & 0x3F;

		if (GROUP_ID_IS_SU_MIMO(group_id)) {
			mcs = (info3 >> 4) & 0x0F;
			nss = ((info2 >> 10) & 0x07) + 1;
		} else {
			/* Hardware doesn't decode VHT-SIG-B into Rx descriptor
			 * so it's impossible to decode MCS. Also since
			 * firmware consumes Group Id Management frames host
			 * has no knowledge regarding group/user position
			 * mapping so it's impossible to pick the correct Nsts
			 * from VHT-SIG-A1.
			 *
			 * Bandwidth and SGI are valid so report the rateinfo
			 * on best-effort basis.
			 */
			mcs = 0;
			nss = 1;
		}
719

720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742
		if (mcs > 0x09) {
			ath10k_warn(ar, "invalid MCS received %u\n", mcs);
			ath10k_warn(ar, "rxd %08x mpdu start %08x %08x msdu start %08x %08x ppdu start %08x %08x %08x %08x %08x\n",
				    __le32_to_cpu(rxd->attention.flags),
				    __le32_to_cpu(rxd->mpdu_start.info0),
				    __le32_to_cpu(rxd->mpdu_start.info1),
				    __le32_to_cpu(rxd->msdu_start.common.info0),
				    __le32_to_cpu(rxd->msdu_start.common.info1),
				    rxd->ppdu_start.info0,
				    __le32_to_cpu(rxd->ppdu_start.info1),
				    __le32_to_cpu(rxd->ppdu_start.info2),
				    __le32_to_cpu(rxd->ppdu_start.info3),
				    __le32_to_cpu(rxd->ppdu_start.info4));

			ath10k_warn(ar, "msdu end %08x mpdu end %08x\n",
				    __le32_to_cpu(rxd->msdu_end.common.info0),
				    __le32_to_cpu(rxd->mpdu_end.info0));

			ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL,
					"rx desc msdu payload: ",
					rxd->msdu_payload, 50);
		}

743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768
		status->rate_idx = mcs;
		status->vht_nss = nss;

		if (sgi)
			status->flag |= RX_FLAG_SHORT_GI;

		switch (bw) {
		/* 20MHZ */
		case 0:
			break;
		/* 40MHZ */
		case 1:
			status->flag |= RX_FLAG_40MHZ;
			break;
		/* 80MHZ */
		case 2:
			status->vht_flag |= RX_VHT_FLAG_80MHZ;
		}

		status->flag |= RX_FLAG_VHT;
		break;
	default:
		break;
	}
}

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static struct ieee80211_channel *
ath10k_htt_rx_h_peer_channel(struct ath10k *ar, struct htt_rx_desc *rxd)
{
	struct ath10k_peer *peer;
	struct ath10k_vif *arvif;
	struct cfg80211_chan_def def;
	u16 peer_id;

	lockdep_assert_held(&ar->data_lock);

	if (!rxd)
		return NULL;

	if (rxd->attention.flags &
	    __cpu_to_le32(RX_ATTENTION_FLAGS_PEER_IDX_INVALID))
		return NULL;

786
	if (!(rxd->msdu_end.common.info0 &
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	      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)))
		return NULL;

	peer_id = MS(__le32_to_cpu(rxd->mpdu_start.info0),
		     RX_MPDU_START_INFO0_PEER_IDX);

	peer = ath10k_peer_find_by_id(ar, peer_id);
	if (!peer)
		return NULL;

	arvif = ath10k_get_arvif(ar, peer->vdev_id);
	if (WARN_ON_ONCE(!arvif))
		return NULL;

	if (WARN_ON(ath10k_mac_vif_chan(arvif->vif, &def)))
		return NULL;

	return def.chan;
}

static struct ieee80211_channel *
ath10k_htt_rx_h_vdev_channel(struct ath10k *ar, u32 vdev_id)
{
	struct ath10k_vif *arvif;
	struct cfg80211_chan_def def;

	lockdep_assert_held(&ar->data_lock);

	list_for_each_entry(arvif, &ar->arvifs, list) {
		if (arvif->vdev_id == vdev_id &&
		    ath10k_mac_vif_chan(arvif->vif, &def) == 0)
			return def.chan;
	}

	return NULL;
}

static void
ath10k_htt_rx_h_any_chan_iter(struct ieee80211_hw *hw,
			      struct ieee80211_chanctx_conf *conf,
			      void *data)
{
	struct cfg80211_chan_def *def = data;

	*def = conf->def;
}

static struct ieee80211_channel *
ath10k_htt_rx_h_any_channel(struct ath10k *ar)
{
	struct cfg80211_chan_def def = {};

	ieee80211_iter_chan_contexts_atomic(ar->hw,
					    ath10k_htt_rx_h_any_chan_iter,
					    &def);

	return def.chan;
}

846
static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
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				    struct ieee80211_rx_status *status,
				    struct htt_rx_desc *rxd,
				    u32 vdev_id)
850 851 852 853 854 855 856
{
	struct ieee80211_channel *ch;

	spin_lock_bh(&ar->data_lock);
	ch = ar->scan_channel;
	if (!ch)
		ch = ar->rx_channel;
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	if (!ch)
		ch = ath10k_htt_rx_h_peer_channel(ar, rxd);
	if (!ch)
		ch = ath10k_htt_rx_h_vdev_channel(ar, vdev_id);
	if (!ch)
		ch = ath10k_htt_rx_h_any_channel(ar);
863 864 865 866 867 868 869 870 871 872 873
	spin_unlock_bh(&ar->data_lock);

	if (!ch)
		return false;

	status->band = ch->band;
	status->freq = ch->center_freq;

	return true;
}

874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893
static void ath10k_htt_rx_h_signal(struct ath10k *ar,
				   struct ieee80211_rx_status *status,
				   struct htt_rx_desc *rxd)
{
	/* FIXME: Get real NF */
	status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
			 rxd->ppdu_start.rssi_comb;
	status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
}

static void ath10k_htt_rx_h_mactime(struct ath10k *ar,
				    struct ieee80211_rx_status *status,
				    struct htt_rx_desc *rxd)
{
	/* FIXME: TSF is known only at the end of PPDU, in the last MPDU. This
	 * means all prior MSDUs in a PPDU are reported to mac80211 without the
	 * TSF. Is it worth holding frames until end of PPDU is known?
	 *
	 * FIXME: Can we get/compute 64bit TSF?
	 */
894
	status->mactime = __le32_to_cpu(rxd->ppdu_end.common.tsf_timestamp);
895 896 897 898 899
	status->flag |= RX_FLAG_MACTIME_END;
}

static void ath10k_htt_rx_h_ppdu(struct ath10k *ar,
				 struct sk_buff_head *amsdu,
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Michal Kazior 已提交
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				 struct ieee80211_rx_status *status,
				 u32 vdev_id)
902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932
{
	struct sk_buff *first;
	struct htt_rx_desc *rxd;
	bool is_first_ppdu;
	bool is_last_ppdu;

	if (skb_queue_empty(amsdu))
		return;

	first = skb_peek(amsdu);
	rxd = (void *)first->data - sizeof(*rxd);

	is_first_ppdu = !!(rxd->attention.flags &
			   __cpu_to_le32(RX_ATTENTION_FLAGS_FIRST_MPDU));
	is_last_ppdu = !!(rxd->attention.flags &
			  __cpu_to_le32(RX_ATTENTION_FLAGS_LAST_MPDU));

	if (is_first_ppdu) {
		/* New PPDU starts so clear out the old per-PPDU status. */
		status->freq = 0;
		status->rate_idx = 0;
		status->vht_nss = 0;
		status->vht_flag &= ~RX_VHT_FLAG_80MHZ;
		status->flag &= ~(RX_FLAG_HT |
				  RX_FLAG_VHT |
				  RX_FLAG_SHORT_GI |
				  RX_FLAG_40MHZ |
				  RX_FLAG_MACTIME_END);
		status->flag |= RX_FLAG_NO_SIGNAL_VAL;

		ath10k_htt_rx_h_signal(ar, status, rxd);
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Michal Kazior 已提交
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		ath10k_htt_rx_h_channel(ar, status, rxd, vdev_id);
934 935 936 937 938 939 940
		ath10k_htt_rx_h_rates(ar, status, rxd);
	}

	if (is_last_ppdu)
		ath10k_htt_rx_h_mactime(ar, status, rxd);
}

941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969
static const char * const tid_to_ac[] = {
	"BE",
	"BK",
	"BK",
	"BE",
	"VI",
	"VI",
	"VO",
	"VO",
};

static char *ath10k_get_tid(struct ieee80211_hdr *hdr, char *out, size_t size)
{
	u8 *qc;
	int tid;

	if (!ieee80211_is_data_qos(hdr->frame_control))
		return "";

	qc = ieee80211_get_qos_ctl(hdr);
	tid = *qc & IEEE80211_QOS_CTL_TID_MASK;
	if (tid < 8)
		snprintf(out, size, "tid %d (%s)", tid, tid_to_ac[tid]);
	else
		snprintf(out, size, "tid %d", tid);

	return out;
}

970 971 972
static void ath10k_process_rx(struct ath10k *ar,
			      struct ieee80211_rx_status *rx_status,
			      struct sk_buff *skb)
973 974
{
	struct ieee80211_rx_status *status;
975 976
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
	char tid[32];
977

978 979
	status = IEEE80211_SKB_RXCB(skb);
	*status = *rx_status;
980

981
	ath10k_dbg(ar, ATH10K_DBG_DATA,
982
		   "rx skb %p len %u peer %pM %s %s sn %u %s%s%s%s%s %srate_idx %u vht_nss %u freq %u band %u flag 0x%x fcs-err %i mic-err %i amsdu-more %i\n",
983 984
		   skb,
		   skb->len,
985 986 987 988 989
		   ieee80211_get_SA(hdr),
		   ath10k_get_tid(hdr, tid, sizeof(tid)),
		   is_multicast_ether_addr(ieee80211_get_DA(hdr)) ?
							"mcast" : "ucast",
		   (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4,
990 991 992 993 994 995 996 997 998
		   status->flag == 0 ? "legacy" : "",
		   status->flag & RX_FLAG_HT ? "ht" : "",
		   status->flag & RX_FLAG_VHT ? "vht" : "",
		   status->flag & RX_FLAG_40MHZ ? "40" : "",
		   status->vht_flag & RX_VHT_FLAG_80MHZ ? "80" : "",
		   status->flag & RX_FLAG_SHORT_GI ? "sgi " : "",
		   status->rate_idx,
		   status->vht_nss,
		   status->freq,
999
		   status->band, status->flag,
1000
		   !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
1001 1002
		   !!(status->flag & RX_FLAG_MMIC_ERROR),
		   !!(status->flag & RX_FLAG_AMSDU_MORE));
1003
	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
1004
			skb->data, skb->len);
1005 1006
	trace_ath10k_rx_hdr(ar, skb->data, skb->len);
	trace_ath10k_rx_payload(ar, skb->data, skb->len);
1007

1008
	ieee80211_rx(ar->hw, skb);
1009 1010
}

1011 1012
static int ath10k_htt_rx_nwifi_hdrlen(struct ath10k *ar,
				      struct ieee80211_hdr *hdr)
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Michal Kazior 已提交
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{
1014 1015 1016 1017 1018 1019 1020
	int len = ieee80211_hdrlen(hdr->frame_control);

	if (!test_bit(ATH10K_FW_FEATURE_NO_NWIFI_DECAP_4ADDR_PADDING,
		      ar->fw_features))
		len = round_up(len, 4);

	return len;
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}

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static void ath10k_htt_rx_h_undecap_raw(struct ath10k *ar,
					struct sk_buff *msdu,
					struct ieee80211_rx_status *status,
					enum htt_rx_mpdu_encrypt_type enctype,
					bool is_decrypted)
1028
{
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	struct ieee80211_hdr *hdr;
1030
	struct htt_rx_desc *rxd;
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	size_t hdr_len;
	size_t crypto_len;
	bool is_first;
	bool is_last;

	rxd = (void *)msdu->data - sizeof(*rxd);
1037
	is_first = !!(rxd->msdu_end.common.info0 &
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Michal Kazior 已提交
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		      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1039
	is_last = !!(rxd->msdu_end.common.info0 &
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Michal Kazior 已提交
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		     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));

	/* Delivered decapped frame:
	 * [802.11 header]
	 * [crypto param] <-- can be trimmed if !fcs_err &&
	 *                    !decrypt_err && !peer_idx_invalid
	 * [amsdu header] <-- only if A-MSDU
	 * [rfc1042/llc]
	 * [payload]
	 * [FCS] <-- at end, needs to be trimmed
	 */

	/* This probably shouldn't happen but warn just in case */
	if (unlikely(WARN_ON_ONCE(!is_first)))
		return;

	/* This probably shouldn't happen but warn just in case */
	if (unlikely(WARN_ON_ONCE(!(is_first && is_last))))
		return;

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

	/* In most cases this will be true for sniffed frames. It makes sense
1063 1064
	 * to deliver them as-is without stripping the crypto param. This is
	 * necessary for software based decryption.
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	 *
	 * If there's no error then the frame is decrypted. At least that is
	 * the case for frames that come in via fragmented rx indication.
	 */
	if (!is_decrypted)
		return;

	/* The payload is decrypted so strip crypto params. Start from tail
	 * since hdr is used to compute some stuff.
	 */

	hdr = (void *)msdu->data;

	/* Tail */
	skb_trim(msdu, msdu->len - ath10k_htt_rx_crypto_tail_len(ar, enctype));

	/* MMIC */
	if (!ieee80211_has_morefrags(hdr->frame_control) &&
	    enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
		skb_trim(msdu, msdu->len - 8);

	/* Head */
	hdr_len = ieee80211_hdrlen(hdr->frame_control);
	crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);

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

static void ath10k_htt_rx_h_undecap_nwifi(struct ath10k *ar,
					  struct sk_buff *msdu,
					  struct ieee80211_rx_status *status,
					  const u8 first_hdr[64])
{
1100
	struct ieee80211_hdr *hdr;
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	size_t hdr_len;
	u8 da[ETH_ALEN];
	u8 sa[ETH_ALEN];
1104

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	/* Delivered decapped frame:
	 * [nwifi 802.11 header] <-- replaced with 802.11 hdr
	 * [rfc1042/llc]
	 *
	 * Note: The nwifi header doesn't have QoS Control and is
	 * (always?) a 3addr frame.
	 *
	 * Note2: There's no A-MSDU subframe header. Even if it's part
	 * of an A-MSDU.
	 */
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1116
	/* pull decapped header and copy SA & DA */
1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130
	if ((ar->hw_params.hw_4addr_pad == ATH10K_HW_4ADDR_PAD_BEFORE) &&
	    ieee80211_has_a4(((struct ieee80211_hdr *)first_hdr)->frame_control)) {
		/* The QCA99X0 4 address mode pad 2 bytes at the
		 * beginning of MSDU
		 */
		hdr = (struct ieee80211_hdr *)(msdu->data + 2);
		/* The skb length need be extended 2 as the 2 bytes at the tail
		 * be excluded due to the padding
		 */
		skb_put(msdu, 2);
	} else {
		hdr = (struct ieee80211_hdr *)(msdu->data);
	}

1131
	hdr_len = ath10k_htt_rx_nwifi_hdrlen(ar, hdr);
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1132 1133 1134
	ether_addr_copy(da, ieee80211_get_DA(hdr));
	ether_addr_copy(sa, ieee80211_get_SA(hdr));
	skb_pull(msdu, hdr_len);
1135

M
Michal Kazior 已提交
1136 1137
	/* push original 802.11 header */
	hdr = (struct ieee80211_hdr *)first_hdr;
1138
	hdr_len = ieee80211_hdrlen(hdr->frame_control);
M
Michal Kazior 已提交
1139
	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
1140

M
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1141 1142 1143 1144 1145 1146 1147
	/* original 802.11 header has a different DA and in
	 * case of 4addr it may also have different SA
	 */
	hdr = (struct ieee80211_hdr *)msdu->data;
	ether_addr_copy(ieee80211_get_DA(hdr), da);
	ether_addr_copy(ieee80211_get_SA(hdr), sa);
}
1148

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Michal Kazior 已提交
1149 1150 1151 1152 1153 1154 1155 1156 1157
static void *ath10k_htt_rx_h_find_rfc1042(struct ath10k *ar,
					  struct sk_buff *msdu,
					  enum htt_rx_mpdu_encrypt_type enctype)
{
	struct ieee80211_hdr *hdr;
	struct htt_rx_desc *rxd;
	size_t hdr_len, crypto_len;
	void *rfc1042;
	bool is_first, is_last, is_amsdu;
1158

M
Michal Kazior 已提交
1159 1160
	rxd = (void *)msdu->data - sizeof(*rxd);
	hdr = (void *)rxd->rx_hdr_status;
1161

1162
	is_first = !!(rxd->msdu_end.common.info0 &
M
Michal Kazior 已提交
1163
		      __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
1164
	is_last = !!(rxd->msdu_end.common.info0 &
M
Michal Kazior 已提交
1165 1166
		     __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
	is_amsdu = !(is_first && is_last);
1167

M
Michal Kazior 已提交
1168
	rfc1042 = hdr;
1169

M
Michal Kazior 已提交
1170 1171 1172
	if (is_first) {
		hdr_len = ieee80211_hdrlen(hdr->frame_control);
		crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
1173

M
Michal Kazior 已提交
1174 1175
		rfc1042 += round_up(hdr_len, 4) +
			   round_up(crypto_len, 4);
1176
	}
1177

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Michal Kazior 已提交
1178 1179 1180 1181
	if (is_amsdu)
		rfc1042 += sizeof(struct amsdu_subframe_hdr);

	return rfc1042;
1182 1183
}

M
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1184 1185 1186 1187 1188
static void ath10k_htt_rx_h_undecap_eth(struct ath10k *ar,
					struct sk_buff *msdu,
					struct ieee80211_rx_status *status,
					const u8 first_hdr[64],
					enum htt_rx_mpdu_encrypt_type enctype)
1189 1190
{
	struct ieee80211_hdr *hdr;
M
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1191 1192
	struct ethhdr *eth;
	size_t hdr_len;
1193
	void *rfc1042;
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	u8 da[ETH_ALEN];
	u8 sa[ETH_ALEN];
1196

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1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245
	/* Delivered decapped frame:
	 * [eth header] <-- replaced with 802.11 hdr & rfc1042/llc
	 * [payload]
	 */

	rfc1042 = ath10k_htt_rx_h_find_rfc1042(ar, msdu, enctype);
	if (WARN_ON_ONCE(!rfc1042))
		return;

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

	/* push rfc1042/llc/snap */
	memcpy(skb_push(msdu, sizeof(struct rfc1042_hdr)), rfc1042,
	       sizeof(struct rfc1042_hdr));

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

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

static void ath10k_htt_rx_h_undecap_snap(struct ath10k *ar,
					 struct sk_buff *msdu,
					 struct ieee80211_rx_status *status,
					 const u8 first_hdr[64])
{
	struct ieee80211_hdr *hdr;
	size_t hdr_len;

	/* Delivered decapped frame:
	 * [amsdu header] <-- replaced with 802.11 hdr
	 * [rfc1042/llc]
	 * [payload]
	 */

	skb_pull(msdu, sizeof(struct amsdu_subframe_hdr));

	hdr = (struct ieee80211_hdr *)first_hdr;
1246
	hdr_len = ieee80211_hdrlen(hdr->frame_control);
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Michal Kazior 已提交
1247 1248
	memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
}
1249

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Michal Kazior 已提交
1250 1251 1252 1253 1254 1255 1256 1257 1258
static void ath10k_htt_rx_h_undecap(struct ath10k *ar,
				    struct sk_buff *msdu,
				    struct ieee80211_rx_status *status,
				    u8 first_hdr[64],
				    enum htt_rx_mpdu_encrypt_type enctype,
				    bool is_decrypted)
{
	struct htt_rx_desc *rxd;
	enum rx_msdu_decap_format decap;
1259

M
Michal Kazior 已提交
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271
	/* First msdu's decapped header:
	 * [802.11 header] <-- padded to 4 bytes long
	 * [crypto param] <-- padded to 4 bytes long
	 * [amsdu header] <-- only if A-MSDU
	 * [rfc1042/llc]
	 *
	 * Other (2nd, 3rd, ..) msdu's decapped header:
	 * [amsdu header] <-- only if A-MSDU
	 * [rfc1042/llc]
	 */

	rxd = (void *)msdu->data - sizeof(*rxd);
1272
	decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
M
Michal Kazior 已提交
1273 1274 1275
		   RX_MSDU_START_INFO1_DECAP_FORMAT);

	switch (decap) {
1276
	case RX_MSDU_DECAP_RAW:
M
Michal Kazior 已提交
1277 1278
		ath10k_htt_rx_h_undecap_raw(ar, msdu, status, enctype,
					    is_decrypted);
1279 1280
		break;
	case RX_MSDU_DECAP_NATIVE_WIFI:
M
Michal Kazior 已提交
1281
		ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr);
1282 1283
		break;
	case RX_MSDU_DECAP_ETHERNET2_DIX:
M
Michal Kazior 已提交
1284
		ath10k_htt_rx_h_undecap_eth(ar, msdu, status, first_hdr, enctype);
1285 1286
		break;
	case RX_MSDU_DECAP_8023_SNAP_LLC:
M
Michal Kazior 已提交
1287
		ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr);
1288
		break;
1289 1290 1291
	}
}

1292 1293 1294 1295 1296 1297 1298 1299 1300 1301
static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb)
{
	struct htt_rx_desc *rxd;
	u32 flags, info;
	bool is_ip4, is_ip6;
	bool is_tcp, is_udp;
	bool ip_csum_ok, tcpudp_csum_ok;

	rxd = (void *)skb->data - sizeof(*rxd);
	flags = __le32_to_cpu(rxd->attention.flags);
1302
	info = __le32_to_cpu(rxd->msdu_start.common.info1);
1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322

	is_ip4 = !!(info & RX_MSDU_START_INFO1_IPV4_PROTO);
	is_ip6 = !!(info & RX_MSDU_START_INFO1_IPV6_PROTO);
	is_tcp = !!(info & RX_MSDU_START_INFO1_TCP_PROTO);
	is_udp = !!(info & RX_MSDU_START_INFO1_UDP_PROTO);
	ip_csum_ok = !(flags & RX_ATTENTION_FLAGS_IP_CHKSUM_FAIL);
	tcpudp_csum_ok = !(flags & RX_ATTENTION_FLAGS_TCP_UDP_CHKSUM_FAIL);

	if (!is_ip4 && !is_ip6)
		return CHECKSUM_NONE;
	if (!is_tcp && !is_udp)
		return CHECKSUM_NONE;
	if (!ip_csum_ok)
		return CHECKSUM_NONE;
	if (!tcpudp_csum_ok)
		return CHECKSUM_NONE;

	return CHECKSUM_UNNECESSARY;
}

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static void ath10k_htt_rx_h_csum_offload(struct sk_buff *msdu)
{
	msdu->ip_summed = ath10k_htt_rx_get_csum_state(msdu);
}

static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
				 struct sk_buff_head *amsdu,
				 struct ieee80211_rx_status *status)
{
	struct sk_buff *first;
	struct sk_buff *last;
	struct sk_buff *msdu;
	struct htt_rx_desc *rxd;
	struct ieee80211_hdr *hdr;
	enum htt_rx_mpdu_encrypt_type enctype;
	u8 first_hdr[64];
	u8 *qos;
	size_t hdr_len;
	bool has_fcs_err;
	bool has_crypto_err;
	bool has_tkip_err;
	bool has_peer_idx_invalid;
	bool is_decrypted;
	u32 attention;

	if (skb_queue_empty(amsdu))
		return;

	first = skb_peek(amsdu);
	rxd = (void *)first->data - sizeof(*rxd);

	enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
		     RX_MPDU_START_INFO0_ENCRYPT_TYPE);

	/* First MSDU's Rx descriptor in an A-MSDU contains full 802.11
	 * decapped header. It'll be used for undecapping of each MSDU.
	 */
	hdr = (void *)rxd->rx_hdr_status;
	hdr_len = ieee80211_hdrlen(hdr->frame_control);
	memcpy(first_hdr, hdr, hdr_len);

	/* Each A-MSDU subframe will use the original header as the base and be
	 * reported as a separate MSDU so strip the A-MSDU bit from QoS Ctl.
	 */
	hdr = (void *)first_hdr;
	qos = ieee80211_get_qos_ctl(hdr);
	qos[0] &= ~IEEE80211_QOS_CTL_A_MSDU_PRESENT;

	/* Some attention flags are valid only in the last MSDU. */
	last = skb_peek_tail(amsdu);
	rxd = (void *)last->data - sizeof(*rxd);
	attention = __le32_to_cpu(rxd->attention.flags);

	has_fcs_err = !!(attention & RX_ATTENTION_FLAGS_FCS_ERR);
	has_crypto_err = !!(attention & RX_ATTENTION_FLAGS_DECRYPT_ERR);
	has_tkip_err = !!(attention & RX_ATTENTION_FLAGS_TKIP_MIC_ERR);
	has_peer_idx_invalid = !!(attention & RX_ATTENTION_FLAGS_PEER_IDX_INVALID);

	/* Note: If hardware captures an encrypted frame that it can't decrypt,
	 * e.g. due to fcs error, missing peer or invalid key data it will
	 * report the frame as raw.
	 */
	is_decrypted = (enctype != HTT_RX_MPDU_ENCRYPT_NONE &&
			!has_fcs_err &&
			!has_crypto_err &&
			!has_peer_idx_invalid);

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

	if (has_fcs_err)
		status->flag |= RX_FLAG_FAILED_FCS_CRC;

	if (has_tkip_err)
		status->flag |= RX_FLAG_MMIC_ERROR;

	if (is_decrypted)
		status->flag |= RX_FLAG_DECRYPTED |
				RX_FLAG_IV_STRIPPED |
				RX_FLAG_MMIC_STRIPPED;

	skb_queue_walk(amsdu, msdu) {
		ath10k_htt_rx_h_csum_offload(msdu);
		ath10k_htt_rx_h_undecap(ar, msdu, status, first_hdr, enctype,
					is_decrypted);

		/* Undecapping involves copying the original 802.11 header back
		 * to sk_buff. If frame is protected and hardware has decrypted
		 * it then remove the protected bit.
		 */
		if (!is_decrypted)
			continue;

		hdr = (void *)msdu->data;
		hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
	}
}

static void ath10k_htt_rx_h_deliver(struct ath10k *ar,
				    struct sk_buff_head *amsdu,
				    struct ieee80211_rx_status *status)
{
	struct sk_buff *msdu;

	while ((msdu = __skb_dequeue(amsdu))) {
		/* Setup per-MSDU flags */
		if (skb_queue_empty(amsdu))
			status->flag &= ~RX_FLAG_AMSDU_MORE;
		else
			status->flag |= RX_FLAG_AMSDU_MORE;

		ath10k_process_rx(ar, status, msdu);
	}
}

M
Michal Kazior 已提交
1442
static int ath10k_unchain_msdu(struct sk_buff_head *amsdu)
B
Ben Greear 已提交
1443
{
M
Michal Kazior 已提交
1444
	struct sk_buff *skb, *first;
B
Ben Greear 已提交
1445 1446 1447 1448 1449 1450 1451 1452 1453 1454
	int space;
	int total_len = 0;

	/* TODO:  Might could optimize this by using
	 * skb_try_coalesce or similar method to
	 * decrease copying, or maybe get mac80211 to
	 * provide a way to just receive a list of
	 * skb?
	 */

M
Michal Kazior 已提交
1455
	first = __skb_dequeue(amsdu);
B
Ben Greear 已提交
1456 1457

	/* Allocate total length all at once. */
M
Michal Kazior 已提交
1458 1459
	skb_queue_walk(amsdu, skb)
		total_len += skb->len;
B
Ben Greear 已提交
1460

M
Michal Kazior 已提交
1461
	space = total_len - skb_tailroom(first);
B
Ben Greear 已提交
1462
	if ((space > 0) &&
M
Michal Kazior 已提交
1463
	    (pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0)) {
B
Ben Greear 已提交
1464 1465 1466 1467
		/* TODO:  bump some rx-oom error stat */
		/* put it back together so we can free the
		 * whole list at once.
		 */
M
Michal Kazior 已提交
1468
		__skb_queue_head(amsdu, first);
B
Ben Greear 已提交
1469 1470 1471 1472 1473 1474
		return -1;
	}

	/* Walk list again, copying contents into
	 * msdu_head
	 */
M
Michal Kazior 已提交
1475 1476 1477 1478
	while ((skb = __skb_dequeue(amsdu))) {
		skb_copy_from_linear_data(skb, skb_put(first, skb->len),
					  skb->len);
		dev_kfree_skb_any(skb);
B
Ben Greear 已提交
1479 1480
	}

M
Michal Kazior 已提交
1481
	__skb_queue_head(amsdu, first);
B
Ben Greear 已提交
1482 1483 1484
	return 0;
}

M
Michal Kazior 已提交
1485 1486 1487
static void ath10k_htt_rx_h_unchain(struct ath10k *ar,
				    struct sk_buff_head *amsdu,
				    bool chained)
1488
{
M
Michal Kazior 已提交
1489 1490 1491
	struct sk_buff *first;
	struct htt_rx_desc *rxd;
	enum rx_msdu_decap_format decap;
1492

M
Michal Kazior 已提交
1493 1494
	first = skb_peek(amsdu);
	rxd = (void *)first->data - sizeof(*rxd);
1495
	decap = MS(__le32_to_cpu(rxd->msdu_start.common.info1),
M
Michal Kazior 已提交
1496
		   RX_MSDU_START_INFO1_DECAP_FORMAT);
1497

M
Michal Kazior 已提交
1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509
	if (!chained)
		return;

	/* FIXME: Current unchaining logic can only handle simple case of raw
	 * msdu chaining. If decapping is other than raw the chaining may be
	 * more complex and this isn't handled by the current code. Don't even
	 * try re-constructing such frames - it'll be pretty much garbage.
	 */
	if (decap != RX_MSDU_DECAP_RAW ||
	    skb_queue_len(amsdu) != 1 + rxd->frag_info.ring2_more_count) {
		__skb_queue_purge(amsdu);
		return;
1510 1511
	}

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Michal Kazior 已提交
1512 1513 1514 1515 1516 1517 1518 1519 1520
	ath10k_unchain_msdu(amsdu);
}

static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar,
					struct sk_buff_head *amsdu,
					struct ieee80211_rx_status *rx_status)
{
	struct sk_buff *msdu;
	struct htt_rx_desc *rxd;
1521 1522
	bool is_mgmt;
	bool has_fcs_err;
M
Michal Kazior 已提交
1523 1524 1525 1526 1527 1528 1529 1530 1531 1532

	msdu = skb_peek(amsdu);
	rxd = (void *)msdu->data - sizeof(*rxd);

	/* FIXME: It might be a good idea to do some fuzzy-testing to drop
	 * invalid/dangerous frames.
	 */

	if (!rx_status->freq) {
		ath10k_warn(ar, "no channel configured; ignoring frame(s)!\n");
1533 1534 1535
		return false;
	}

1536 1537 1538 1539 1540
	is_mgmt = !!(rxd->attention.flags &
		     __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE));
	has_fcs_err = !!(rxd->attention.flags &
			 __cpu_to_le32(RX_ATTENTION_FLAGS_FCS_ERR));

M
Michal Kazior 已提交
1541 1542 1543
	/* Management frames are handled via WMI events. The pros of such
	 * approach is that channel is explicitly provided in WMI events
	 * whereas HTT doesn't provide channel information for Rxed frames.
1544 1545 1546
	 *
	 * However some firmware revisions don't report corrupted frames via
	 * WMI so don't drop them.
M
Michal Kazior 已提交
1547
	 */
1548
	if (is_mgmt && !has_fcs_err) {
1549
		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx mgmt ctrl\n");
1550 1551 1552
		return false;
	}

M
Michal Kazior 已提交
1553 1554
	if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) {
		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx cac running\n");
1555 1556 1557 1558 1559 1560
		return false;
	}

	return true;
}

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Michal Kazior 已提交
1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573
static void ath10k_htt_rx_h_filter(struct ath10k *ar,
				   struct sk_buff_head *amsdu,
				   struct ieee80211_rx_status *rx_status)
{
	if (skb_queue_empty(amsdu))
		return;

	if (ath10k_htt_rx_amsdu_allowed(ar, amsdu, rx_status))
		return;

	__skb_queue_purge(amsdu);
}

1574 1575 1576
static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
				  struct htt_rx_indication *rx)
{
1577
	struct ath10k *ar = htt->ar;
1578
	struct ieee80211_rx_status *rx_status = &htt->rx_status;
1579
	struct htt_rx_indication_mpdu_range *mpdu_ranges;
M
Michal Kazior 已提交
1580
	struct sk_buff_head amsdu;
1581 1582 1583
	int num_mpdu_ranges;
	int fw_desc_len;
	u8 *fw_desc;
M
Michal Kazior 已提交
1584
	int i, ret, mpdu_count = 0;
1585

1586 1587
	lockdep_assert_held(&htt->rx_ring.lock);

M
Michal Kazior 已提交
1588 1589 1590
	if (htt->rx_confused)
		return;

1591 1592 1593 1594 1595 1596 1597
	fw_desc_len = __le16_to_cpu(rx->prefix.fw_rx_desc_bytes);
	fw_desc = (u8 *)&rx->fw_desc;

	num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
			     HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
	mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);

1598
	ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
1599 1600 1601 1602
			rx, sizeof(*rx) +
			(sizeof(struct htt_rx_indication_mpdu_range) *
				num_mpdu_ranges));

M
Michal Kazior 已提交
1603 1604 1605 1606 1607 1608
	for (i = 0; i < num_mpdu_ranges; i++)
		mpdu_count += mpdu_ranges[i].mpdu_count;

	while (mpdu_count--) {
		__skb_queue_head_init(&amsdu);
		ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc,
1609
					      &fw_desc_len, &amsdu);
M
Michal Kazior 已提交
1610
		if (ret < 0) {
M
Michal Kazior 已提交
1611
			ath10k_warn(ar, "rx ring became corrupted: %d\n", ret);
M
Michal Kazior 已提交
1612
			__skb_queue_purge(&amsdu);
M
Michal Kazior 已提交
1613 1614 1615 1616 1617
			/* FIXME: It's probably a good idea to reboot the
			 * device instead of leaving it inoperable.
			 */
			htt->rx_confused = true;
			break;
M
Michal Kazior 已提交
1618
		}
1619

M
Michal Kazior 已提交
1620
		ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff);
M
Michal Kazior 已提交
1621 1622 1623 1624
		ath10k_htt_rx_h_unchain(ar, &amsdu, ret > 0);
		ath10k_htt_rx_h_filter(ar, &amsdu, rx_status);
		ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status);
		ath10k_htt_rx_h_deliver(ar, &amsdu, rx_status);
1625 1626
	}

1627
	tasklet_schedule(&htt->rx_replenish_task);
1628 1629 1630
}

static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt,
1631
				       struct htt_rx_fragment_indication *frag)
1632
{
1633
	struct ath10k *ar = htt->ar;
1634
	struct ieee80211_rx_status *rx_status = &htt->rx_status;
M
Michal Kazior 已提交
1635
	struct sk_buff_head amsdu;
1636
	int ret;
1637
	u8 *fw_desc;
M
Michal Kazior 已提交
1638
	int fw_desc_len;
1639 1640 1641 1642

	fw_desc_len = __le16_to_cpu(frag->fw_rx_desc_bytes);
	fw_desc = (u8 *)frag->fw_msdu_rx_desc;

M
Michal Kazior 已提交
1643
	__skb_queue_head_init(&amsdu);
1644 1645

	spin_lock_bh(&htt->rx_ring.lock);
1646
	ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc, &fw_desc_len,
1647
				      &amsdu);
1648
	spin_unlock_bh(&htt->rx_ring.lock);
1649

1650 1651
	tasklet_schedule(&htt->rx_replenish_task);

1652
	ath10k_dbg(ar, ATH10K_DBG_HTT_DUMP, "htt rx frag ahead\n");
1653

1654
	if (ret) {
1655
		ath10k_warn(ar, "failed to pop amsdu from httr rx ring for fragmented rx %d\n",
1656
			    ret);
M
Michal Kazior 已提交
1657
		__skb_queue_purge(&amsdu);
1658 1659 1660
		return;
	}

M
Michal Kazior 已提交
1661 1662 1663 1664 1665 1666
	if (skb_queue_len(&amsdu) != 1) {
		ath10k_warn(ar, "failed to pop frag amsdu: too many msdus\n");
		__skb_queue_purge(&amsdu);
		return;
	}

M
Michal Kazior 已提交
1667
	ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff);
M
Michal Kazior 已提交
1668 1669 1670
	ath10k_htt_rx_h_filter(ar, &amsdu, rx_status);
	ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status);
	ath10k_htt_rx_h_deliver(ar, &amsdu, rx_status);
1671 1672

	if (fw_desc_len > 0) {
1673
		ath10k_dbg(ar, ATH10K_DBG_HTT,
1674 1675 1676 1677 1678
			   "expecting more fragmented rx in one indication %d\n",
			   fw_desc_len);
	}
}

1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693
static void ath10k_htt_rx_frm_tx_compl(struct ath10k *ar,
				       struct sk_buff *skb)
{
	struct ath10k_htt *htt = &ar->htt;
	struct htt_resp *resp = (struct htt_resp *)skb->data;
	struct htt_tx_done tx_done = {};
	int status = MS(resp->data_tx_completion.flags, HTT_DATA_TX_STATUS);
	__le16 msdu_id;
	int i;

	switch (status) {
	case HTT_DATA_TX_STATUS_NO_ACK:
		tx_done.no_ack = true;
		break;
	case HTT_DATA_TX_STATUS_OK:
1694
		tx_done.success = true;
1695 1696 1697 1698 1699 1700 1701
		break;
	case HTT_DATA_TX_STATUS_DISCARD:
	case HTT_DATA_TX_STATUS_POSTPONE:
	case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL:
		tx_done.discard = true;
		break;
	default:
1702
		ath10k_warn(ar, "unhandled tx completion status %d\n", status);
1703 1704 1705 1706
		tx_done.discard = true;
		break;
	}

1707
	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
1708 1709 1710 1711 1712 1713 1714 1715 1716
		   resp->data_tx_completion.num_msdus);

	for (i = 0; i < resp->data_tx_completion.num_msdus; i++) {
		msdu_id = resp->data_tx_completion.msdus[i];
		tx_done.msdu_id = __le16_to_cpu(msdu_id);
		ath10k_txrx_tx_unref(htt, &tx_done);
	}
}

1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727
static void ath10k_htt_rx_addba(struct ath10k *ar, struct htt_resp *resp)
{
	struct htt_rx_addba *ev = &resp->rx_addba;
	struct ath10k_peer *peer;
	struct ath10k_vif *arvif;
	u16 info0, tid, peer_id;

	info0 = __le16_to_cpu(ev->info0);
	tid = MS(info0, HTT_RX_BA_INFO0_TID);
	peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);

1728
	ath10k_dbg(ar, ATH10K_DBG_HTT,
1729 1730 1731 1732 1733 1734
		   "htt rx addba tid %hu peer_id %hu size %hhu\n",
		   tid, peer_id, ev->window_size);

	spin_lock_bh(&ar->data_lock);
	peer = ath10k_peer_find_by_id(ar, peer_id);
	if (!peer) {
1735
		ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1736 1737 1738 1739 1740 1741 1742
			    peer_id);
		spin_unlock_bh(&ar->data_lock);
		return;
	}

	arvif = ath10k_get_arvif(ar, peer->vdev_id);
	if (!arvif) {
1743
		ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1744 1745 1746 1747 1748
			    peer->vdev_id);
		spin_unlock_bh(&ar->data_lock);
		return;
	}

1749
	ath10k_dbg(ar, ATH10K_DBG_HTT,
1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767
		   "htt rx start rx ba session sta %pM tid %hu size %hhu\n",
		   peer->addr, tid, ev->window_size);

	ieee80211_start_rx_ba_session_offl(arvif->vif, peer->addr, tid);
	spin_unlock_bh(&ar->data_lock);
}

static void ath10k_htt_rx_delba(struct ath10k *ar, struct htt_resp *resp)
{
	struct htt_rx_delba *ev = &resp->rx_delba;
	struct ath10k_peer *peer;
	struct ath10k_vif *arvif;
	u16 info0, tid, peer_id;

	info0 = __le16_to_cpu(ev->info0);
	tid = MS(info0, HTT_RX_BA_INFO0_TID);
	peer_id = MS(info0, HTT_RX_BA_INFO0_PEER_ID);

1768
	ath10k_dbg(ar, ATH10K_DBG_HTT,
1769 1770 1771 1772 1773 1774
		   "htt rx delba tid %hu peer_id %hu\n",
		   tid, peer_id);

	spin_lock_bh(&ar->data_lock);
	peer = ath10k_peer_find_by_id(ar, peer_id);
	if (!peer) {
1775
		ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
1776 1777 1778 1779 1780 1781 1782
			    peer_id);
		spin_unlock_bh(&ar->data_lock);
		return;
	}

	arvif = ath10k_get_arvif(ar, peer->vdev_id);
	if (!arvif) {
1783
		ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
1784 1785 1786 1787 1788
			    peer->vdev_id);
		spin_unlock_bh(&ar->data_lock);
		return;
	}

1789
	ath10k_dbg(ar, ATH10K_DBG_HTT,
1790 1791 1792 1793 1794 1795 1796
		   "htt rx stop rx ba session sta %pM tid %hu\n",
		   peer->addr, tid);

	ieee80211_stop_rx_ba_session_offl(arvif->vif, peer->addr, tid);
	spin_unlock_bh(&ar->data_lock);
}

1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812
static int ath10k_htt_rx_extract_amsdu(struct sk_buff_head *list,
				       struct sk_buff_head *amsdu)
{
	struct sk_buff *msdu;
	struct htt_rx_desc *rxd;

	if (skb_queue_empty(list))
		return -ENOBUFS;

	if (WARN_ON(!skb_queue_empty(amsdu)))
		return -EINVAL;

	while ((msdu = __skb_dequeue(list))) {
		__skb_queue_tail(amsdu, msdu);

		rxd = (void *)msdu->data - sizeof(*rxd);
1813
		if (rxd->msdu_end.common.info0 &
1814 1815 1816 1817 1818 1819
		    __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))
			break;
	}

	msdu = skb_peek_tail(amsdu);
	rxd = (void *)msdu->data - sizeof(*rxd);
1820
	if (!(rxd->msdu_end.common.info0 &
1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892
	      __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))) {
		skb_queue_splice_init(amsdu, list);
		return -EAGAIN;
	}

	return 0;
}

static void ath10k_htt_rx_h_rx_offload_prot(struct ieee80211_rx_status *status,
					    struct sk_buff *skb)
{
	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;

	if (!ieee80211_has_protected(hdr->frame_control))
		return;

	/* Offloaded frames are already decrypted but firmware insists they are
	 * protected in the 802.11 header. Strip the flag.  Otherwise mac80211
	 * will drop the frame.
	 */

	hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
	status->flag |= RX_FLAG_DECRYPTED |
			RX_FLAG_IV_STRIPPED |
			RX_FLAG_MMIC_STRIPPED;
}

static void ath10k_htt_rx_h_rx_offload(struct ath10k *ar,
				       struct sk_buff_head *list)
{
	struct ath10k_htt *htt = &ar->htt;
	struct ieee80211_rx_status *status = &htt->rx_status;
	struct htt_rx_offload_msdu *rx;
	struct sk_buff *msdu;
	size_t offset;

	while ((msdu = __skb_dequeue(list))) {
		/* Offloaded frames don't have Rx descriptor. Instead they have
		 * a short meta information header.
		 */

		rx = (void *)msdu->data;

		skb_put(msdu, sizeof(*rx));
		skb_pull(msdu, sizeof(*rx));

		if (skb_tailroom(msdu) < __le16_to_cpu(rx->msdu_len)) {
			ath10k_warn(ar, "dropping frame: offloaded rx msdu is too long!\n");
			dev_kfree_skb_any(msdu);
			continue;
		}

		skb_put(msdu, __le16_to_cpu(rx->msdu_len));

		/* Offloaded rx header length isn't multiple of 2 nor 4 so the
		 * actual payload is unaligned. Align the frame.  Otherwise
		 * mac80211 complains.  This shouldn't reduce performance much
		 * because these offloaded frames are rare.
		 */
		offset = 4 - ((unsigned long)msdu->data & 3);
		skb_put(msdu, offset);
		memmove(msdu->data + offset, msdu->data, msdu->len);
		skb_pull(msdu, offset);

		/* FIXME: The frame is NWifi. Re-construct QoS Control
		 * if possible later.
		 */

		memset(status, 0, sizeof(*status));
		status->flag |= RX_FLAG_NO_SIGNAL_VAL;

		ath10k_htt_rx_h_rx_offload_prot(status, msdu);
M
Michal Kazior 已提交
1893
		ath10k_htt_rx_h_channel(ar, status, NULL, rx->vdev_id);
1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965
		ath10k_process_rx(ar, status, msdu);
	}
}

static void ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb)
{
	struct ath10k_htt *htt = &ar->htt;
	struct htt_resp *resp = (void *)skb->data;
	struct ieee80211_rx_status *status = &htt->rx_status;
	struct sk_buff_head list;
	struct sk_buff_head amsdu;
	u16 peer_id;
	u16 msdu_count;
	u8 vdev_id;
	u8 tid;
	bool offload;
	bool frag;
	int ret;

	lockdep_assert_held(&htt->rx_ring.lock);

	if (htt->rx_confused)
		return;

	skb_pull(skb, sizeof(resp->hdr));
	skb_pull(skb, sizeof(resp->rx_in_ord_ind));

	peer_id = __le16_to_cpu(resp->rx_in_ord_ind.peer_id);
	msdu_count = __le16_to_cpu(resp->rx_in_ord_ind.msdu_count);
	vdev_id = resp->rx_in_ord_ind.vdev_id;
	tid = SM(resp->rx_in_ord_ind.info, HTT_RX_IN_ORD_IND_INFO_TID);
	offload = !!(resp->rx_in_ord_ind.info &
			HTT_RX_IN_ORD_IND_INFO_OFFLOAD_MASK);
	frag = !!(resp->rx_in_ord_ind.info & HTT_RX_IN_ORD_IND_INFO_FRAG_MASK);

	ath10k_dbg(ar, ATH10K_DBG_HTT,
		   "htt rx in ord vdev %i peer %i tid %i offload %i frag %i msdu count %i\n",
		   vdev_id, peer_id, tid, offload, frag, msdu_count);

	if (skb->len < msdu_count * sizeof(*resp->rx_in_ord_ind.msdu_descs)) {
		ath10k_warn(ar, "dropping invalid in order rx indication\n");
		return;
	}

	/* The event can deliver more than 1 A-MSDU. Each A-MSDU is later
	 * extracted and processed.
	 */
	__skb_queue_head_init(&list);
	ret = ath10k_htt_rx_pop_paddr_list(htt, &resp->rx_in_ord_ind, &list);
	if (ret < 0) {
		ath10k_warn(ar, "failed to pop paddr list: %d\n", ret);
		htt->rx_confused = true;
		return;
	}

	/* Offloaded frames are very different and need to be handled
	 * separately.
	 */
	if (offload)
		ath10k_htt_rx_h_rx_offload(ar, &list);

	while (!skb_queue_empty(&list)) {
		__skb_queue_head_init(&amsdu);
		ret = ath10k_htt_rx_extract_amsdu(&list, &amsdu);
		switch (ret) {
		case 0:
			/* Note: The in-order indication may report interleaved
			 * frames from different PPDUs meaning reported rx rate
			 * to mac80211 isn't accurate/reliable. It's still
			 * better to report something than nothing though. This
			 * should still give an idea about rx rate to the user.
			 */
M
Michal Kazior 已提交
1966
			ath10k_htt_rx_h_ppdu(ar, &amsdu, status, vdev_id);
1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984
			ath10k_htt_rx_h_filter(ar, &amsdu, status);
			ath10k_htt_rx_h_mpdu(ar, &amsdu, status);
			ath10k_htt_rx_h_deliver(ar, &amsdu, status);
			break;
		case -EAGAIN:
			/* fall through */
		default:
			/* Should not happen. */
			ath10k_warn(ar, "failed to extract amsdu: %d\n", ret);
			htt->rx_confused = true;
			__skb_queue_purge(&list);
			return;
		}
	}

	tasklet_schedule(&htt->rx_replenish_task);
}

1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176
static void ath10k_htt_rx_tx_fetch_resp_id_confirm(struct ath10k *ar,
						   const __le32 *resp_ids,
						   int num_resp_ids)
{
	int i;
	u32 resp_id;

	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm num_resp_ids %d\n",
		   num_resp_ids);

	for (i = 0; i < num_resp_ids; i++) {
		resp_id = le32_to_cpu(resp_ids[i]);

		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm resp_id %u\n",
			   resp_id);

		/* TODO: free resp_id */
	}
}

static void ath10k_htt_rx_tx_fetch_ind(struct ath10k *ar, struct sk_buff *skb)
{
	struct htt_resp *resp = (struct htt_resp *)skb->data;
	struct htt_tx_fetch_record *record;
	size_t len;
	size_t max_num_bytes;
	size_t max_num_msdus;
	const __le32 *resp_ids;
	u16 num_records;
	u16 num_resp_ids;
	u16 peer_id;
	u8 tid;
	int i;

	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind\n");

	len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_ind);
	if (unlikely(skb->len < len)) {
		ath10k_warn(ar, "received corrupted tx_fetch_ind event: buffer too short\n");
		return;
	}

	num_records = le16_to_cpu(resp->tx_fetch_ind.num_records);
	num_resp_ids = le16_to_cpu(resp->tx_fetch_ind.num_resp_ids);

	len += sizeof(resp->tx_fetch_ind.records[0]) * num_records;
	len += sizeof(resp->tx_fetch_ind.resp_ids[0]) * num_resp_ids;

	if (unlikely(skb->len < len)) {
		ath10k_warn(ar, "received corrupted tx_fetch_ind event: too many records/resp_ids\n");
		return;
	}

	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch ind num records %hu num resps %hu seq %hu\n",
		   num_records, num_resp_ids,
		   le16_to_cpu(resp->tx_fetch_ind.fetch_seq_num));

	/* TODO: runtime sanity checks */

	for (i = 0; i < num_records; i++) {
		record = &resp->tx_fetch_ind.records[i];
		peer_id = MS(le16_to_cpu(record->info),
			     HTT_TX_FETCH_RECORD_INFO_PEER_ID);
		tid = MS(le16_to_cpu(record->info),
			 HTT_TX_FETCH_RECORD_INFO_TID);
		max_num_msdus = le16_to_cpu(record->num_msdus);
		max_num_bytes = le32_to_cpu(record->num_bytes);

		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch record %i peer_id %hu tid %hhu msdus %zu bytes %zu\n",
			   i, peer_id, tid, max_num_msdus, max_num_bytes);

		if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
		    unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
			ath10k_warn(ar, "received out of range peer_id %hu tid %hhu\n",
				    peer_id, tid);
			continue;
		}

		/* TODO: dequeue and submit tx to device */
	}

	resp_ids = ath10k_htt_get_tx_fetch_ind_resp_ids(&resp->tx_fetch_ind);
	ath10k_htt_rx_tx_fetch_resp_id_confirm(ar, resp_ids, num_resp_ids);

	/* TODO: generate and send fetch response to device */
}

static void ath10k_htt_rx_tx_fetch_confirm(struct ath10k *ar,
					   struct sk_buff *skb)
{
	const struct htt_resp *resp = (void *)skb->data;
	size_t len;
	int num_resp_ids;

	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx fetch confirm\n");

	len = sizeof(resp->hdr) + sizeof(resp->tx_fetch_confirm);
	if (unlikely(skb->len < len)) {
		ath10k_warn(ar, "received corrupted tx_fetch_confirm event: buffer too short\n");
		return;
	}

	num_resp_ids = le16_to_cpu(resp->tx_fetch_confirm.num_resp_ids);
	len += sizeof(resp->tx_fetch_confirm.resp_ids[0]) * num_resp_ids;

	if (unlikely(skb->len < len)) {
		ath10k_warn(ar, "received corrupted tx_fetch_confirm event: resp_ids buffer overflow\n");
		return;
	}

	ath10k_htt_rx_tx_fetch_resp_id_confirm(ar,
					       resp->tx_fetch_confirm.resp_ids,
					       num_resp_ids);
}

static void ath10k_htt_rx_tx_mode_switch_ind(struct ath10k *ar,
					     struct sk_buff *skb)
{
	const struct htt_resp *resp = (void *)skb->data;
	const struct htt_tx_mode_switch_record *record;
	size_t len;
	size_t num_records;
	enum htt_tx_mode_switch_mode mode;
	bool enable;
	u16 info0;
	u16 info1;
	u16 threshold;
	u16 peer_id;
	u8 tid;
	int i;

	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx tx mode switch ind\n");

	len = sizeof(resp->hdr) + sizeof(resp->tx_mode_switch_ind);
	if (unlikely(skb->len < len)) {
		ath10k_warn(ar, "received corrupted tx_mode_switch_ind event: buffer too short\n");
		return;
	}

	info0 = le16_to_cpu(resp->tx_mode_switch_ind.info0);
	info1 = le16_to_cpu(resp->tx_mode_switch_ind.info1);

	enable = !!(info0 & HTT_TX_MODE_SWITCH_IND_INFO0_ENABLE);
	num_records = MS(info0, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);
	mode = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_MODE);
	threshold = MS(info1, HTT_TX_MODE_SWITCH_IND_INFO1_THRESHOLD);

	ath10k_dbg(ar, ATH10K_DBG_HTT,
		   "htt rx tx mode switch ind info0 0x%04hx info1 0x%04hx enable %d num records %zd mode %d threshold %hu\n",
		   info0, info1, enable, num_records, mode, threshold);

	len += sizeof(resp->tx_mode_switch_ind.records[0]) * num_records;

	if (unlikely(skb->len < len)) {
		ath10k_warn(ar, "received corrupted tx_mode_switch_mode_ind event: too many records\n");
		return;
	}

	switch (mode) {
	case HTT_TX_MODE_SWITCH_PUSH:
	case HTT_TX_MODE_SWITCH_PUSH_PULL:
		break;
	default:
		ath10k_warn(ar, "received invalid tx_mode_switch_mode_ind mode %d, ignoring\n",
			    mode);
		return;
	}

	if (!enable)
		return;

	/* TODO: apply configuration */

	for (i = 0; i < num_records; i++) {
		record = &resp->tx_mode_switch_ind.records[i];
		info0 = le16_to_cpu(record->info0);
		peer_id = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_PEER_ID);
		tid = MS(info0, HTT_TX_MODE_SWITCH_RECORD_INFO0_TID);

		if (unlikely(peer_id >= ar->htt.tx_q_state.num_peers) ||
		    unlikely(tid >= ar->htt.tx_q_state.num_tids)) {
			ath10k_warn(ar, "received out of range peer_id %hu tid %hhu\n",
				    peer_id, tid);
			continue;
		}

		/* TODO: apply configuration */
	}

	/* TODO: apply configuration */
}

2177 2178
void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
{
2179
	struct ath10k_htt *htt = &ar->htt;
2180
	struct htt_resp *resp = (struct htt_resp *)skb->data;
2181
	enum htt_t2h_msg_type type;
2182 2183 2184

	/* confirm alignment */
	if (!IS_ALIGNED((unsigned long)skb->data, 4))
2185
		ath10k_warn(ar, "unaligned htt message, expect trouble\n");
2186

2187
	ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
2188
		   resp->hdr.msg_type);
2189 2190 2191 2192 2193 2194 2195 2196 2197 2198

	if (resp->hdr.msg_type >= ar->htt.t2h_msg_types_max) {
		ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, unsupported msg_type: 0x%0X\n max: 0x%0X",
			   resp->hdr.msg_type, ar->htt.t2h_msg_types_max);
		dev_kfree_skb_any(skb);
		return;
	}
	type = ar->htt.t2h_msg_types[resp->hdr.msg_type];

	switch (type) {
2199 2200 2201 2202 2203 2204
	case HTT_T2H_MSG_TYPE_VERSION_CONF: {
		htt->target_version_major = resp->ver_resp.major;
		htt->target_version_minor = resp->ver_resp.minor;
		complete(&htt->target_version_received);
		break;
	}
2205
	case HTT_T2H_MSG_TYPE_RX_IND:
2206
		skb_queue_tail(&htt->rx_compl_q, skb);
2207 2208
		tasklet_schedule(&htt->txrx_compl_task);
		return;
2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233
	case HTT_T2H_MSG_TYPE_PEER_MAP: {
		struct htt_peer_map_event ev = {
			.vdev_id = resp->peer_map.vdev_id,
			.peer_id = __le16_to_cpu(resp->peer_map.peer_id),
		};
		memcpy(ev.addr, resp->peer_map.addr, sizeof(ev.addr));
		ath10k_peer_map_event(htt, &ev);
		break;
	}
	case HTT_T2H_MSG_TYPE_PEER_UNMAP: {
		struct htt_peer_unmap_event ev = {
			.peer_id = __le16_to_cpu(resp->peer_unmap.peer_id),
		};
		ath10k_peer_unmap_event(htt, &ev);
		break;
	}
	case HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION: {
		struct htt_tx_done tx_done = {};
		int status = __le32_to_cpu(resp->mgmt_tx_completion.status);

		tx_done.msdu_id =
			__le32_to_cpu(resp->mgmt_tx_completion.desc_id);

		switch (status) {
		case HTT_MGMT_TX_STATUS_OK:
2234
			tx_done.success = true;
2235 2236 2237 2238 2239 2240 2241 2242 2243
			break;
		case HTT_MGMT_TX_STATUS_RETRY:
			tx_done.no_ack = true;
			break;
		case HTT_MGMT_TX_STATUS_DROP:
			tx_done.discard = true;
			break;
		}

2244
		ath10k_txrx_tx_unref(htt, &tx_done);
M
Michal Kazior 已提交
2245
		ath10k_mac_tx_push_pending(ar);
2246 2247
		break;
	}
2248
	case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
2249
		skb_queue_tail(&htt->tx_compl_q, skb);
2250 2251
		tasklet_schedule(&htt->txrx_compl_task);
		return;
2252 2253 2254 2255
	case HTT_T2H_MSG_TYPE_SEC_IND: {
		struct ath10k *ar = htt->ar;
		struct htt_security_indication *ev = &resp->security_indication;

2256
		ath10k_dbg(ar, ATH10K_DBG_HTT,
2257 2258 2259 2260 2261 2262 2263 2264
			   "sec ind peer_id %d unicast %d type %d\n",
			  __le16_to_cpu(ev->peer_id),
			  !!(ev->flags & HTT_SECURITY_IS_UNICAST),
			  MS(ev->flags, HTT_SECURITY_TYPE));
		complete(&ar->install_key_done);
		break;
	}
	case HTT_T2H_MSG_TYPE_RX_FRAG_IND: {
2265
		ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
2266 2267 2268 2269 2270 2271 2272
				skb->data, skb->len);
		ath10k_htt_rx_frag_handler(htt, &resp->rx_frag_ind);
		break;
	}
	case HTT_T2H_MSG_TYPE_TEST:
		break;
	case HTT_T2H_MSG_TYPE_STATS_CONF:
2273
		trace_ath10k_htt_stats(ar, skb->data, skb->len);
2274 2275
		break;
	case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
2276 2277 2278 2279 2280
		/* Firmware can return tx frames if it's unable to fully
		 * process them and suspects host may be able to fix it. ath10k
		 * sends all tx frames as already inspected so this shouldn't
		 * happen unless fw has a bug.
		 */
2281
		ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
2282
		break;
2283
	case HTT_T2H_MSG_TYPE_RX_ADDBA:
2284 2285
		ath10k_htt_rx_addba(ar, resp);
		break;
2286
	case HTT_T2H_MSG_TYPE_RX_DELBA:
2287 2288
		ath10k_htt_rx_delba(ar, resp);
		break;
2289 2290 2291 2292 2293 2294 2295 2296 2297
	case HTT_T2H_MSG_TYPE_PKTLOG: {
		struct ath10k_pktlog_hdr *hdr =
			(struct ath10k_pktlog_hdr *)resp->pktlog_msg.payload;

		trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload,
					sizeof(*hdr) +
					__le16_to_cpu(hdr->size));
		break;
	}
2298 2299 2300 2301 2302 2303
	case HTT_T2H_MSG_TYPE_RX_FLUSH: {
		/* Ignore this event because mac80211 takes care of Rx
		 * aggregation reordering.
		 */
		break;
	}
2304
	case HTT_T2H_MSG_TYPE_RX_IN_ORD_PADDR_IND: {
2305
		skb_queue_tail(&htt->rx_in_ord_compl_q, skb);
2306 2307 2308 2309
		tasklet_schedule(&htt->txrx_compl_task);
		return;
	}
	case HTT_T2H_MSG_TYPE_TX_CREDIT_UPDATE_IND:
2310 2311
		break;
	case HTT_T2H_MSG_TYPE_CHAN_CHANGE:
2312
		break;
2313 2314
	case HTT_T2H_MSG_TYPE_AGGR_CONF:
		break;
2315
	case HTT_T2H_MSG_TYPE_TX_FETCH_IND:
2316 2317
		ath10k_htt_rx_tx_fetch_ind(ar, skb);
		break;
M
Michal Kazior 已提交
2318
	case HTT_T2H_MSG_TYPE_TX_FETCH_CONFIRM:
2319 2320
		ath10k_htt_rx_tx_fetch_confirm(ar, skb);
		break;
M
Michal Kazior 已提交
2321
	case HTT_T2H_MSG_TYPE_TX_MODE_SWITCH_IND:
2322
		ath10k_htt_rx_tx_mode_switch_ind(ar, skb);
2323 2324
		break;
	case HTT_T2H_MSG_TYPE_EN_STATS:
2325
	default:
2326 2327
		ath10k_warn(ar, "htt event (%d) not handled\n",
			    resp->hdr.msg_type);
2328
		ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
2329 2330 2331 2332 2333 2334 2335
				skb->data, skb->len);
		break;
	};

	/* Free the indication buffer */
	dev_kfree_skb_any(skb);
}
2336
EXPORT_SYMBOL(ath10k_htt_t2h_msg_handler);
2337

2338 2339 2340
void ath10k_htt_rx_pktlog_completion_handler(struct ath10k *ar,
					     struct sk_buff *skb)
{
2341
	trace_ath10k_htt_pktlog(ar, skb->data, skb->len);
2342 2343 2344 2345
	dev_kfree_skb_any(skb);
}
EXPORT_SYMBOL(ath10k_htt_rx_pktlog_completion_handler);

2346 2347 2348
static void ath10k_htt_txrx_compl_task(unsigned long ptr)
{
	struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
2349
	struct ath10k *ar = htt->ar;
2350
	struct sk_buff_head tx_q;
2351 2352
	struct sk_buff_head rx_q;
	struct sk_buff_head rx_ind_q;
2353 2354
	struct htt_resp *resp;
	struct sk_buff *skb;
2355
	unsigned long flags;
2356

2357
	__skb_queue_head_init(&tx_q);
2358 2359
	__skb_queue_head_init(&rx_q);
	__skb_queue_head_init(&rx_ind_q);
2360 2361 2362 2363 2364

	spin_lock_irqsave(&htt->tx_compl_q.lock, flags);
	skb_queue_splice_init(&htt->tx_compl_q, &tx_q);
	spin_unlock_irqrestore(&htt->tx_compl_q.lock, flags);

2365 2366 2367 2368 2369 2370 2371 2372
	spin_lock_irqsave(&htt->rx_compl_q.lock, flags);
	skb_queue_splice_init(&htt->rx_compl_q, &rx_q);
	spin_unlock_irqrestore(&htt->rx_compl_q.lock, flags);

	spin_lock_irqsave(&htt->rx_in_ord_compl_q.lock, flags);
	skb_queue_splice_init(&htt->rx_in_ord_compl_q, &rx_ind_q);
	spin_unlock_irqrestore(&htt->rx_in_ord_compl_q.lock, flags);

2373
	while ((skb = __skb_dequeue(&tx_q))) {
2374 2375 2376 2377
		ath10k_htt_rx_frm_tx_compl(htt->ar, skb);
		dev_kfree_skb_any(skb);
	}

M
Michal Kazior 已提交
2378 2379
	ath10k_mac_tx_push_pending(ar);

2380
	while ((skb = __skb_dequeue(&rx_q))) {
2381
		resp = (struct htt_resp *)skb->data;
2382
		spin_lock_bh(&htt->rx_ring.lock);
2383
		ath10k_htt_rx_handler(htt, &resp->rx_ind);
2384
		spin_unlock_bh(&htt->rx_ring.lock);
2385 2386
		dev_kfree_skb_any(skb);
	}
2387

2388
	while ((skb = __skb_dequeue(&rx_ind_q))) {
2389
		spin_lock_bh(&htt->rx_ring.lock);
2390
		ath10k_htt_rx_in_ord_ind(ar, skb);
2391
		spin_unlock_bh(&htt->rx_ring.lock);
2392 2393
		dev_kfree_skb_any(skb);
	}
2394
}