--- /dev/null
+/*
+ * 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.
+ */
+
+#include "core.h"
+#include "htc.h"
+#include "htt.h"
+#include "txrx.h"
+#include "debug.h"
+#include "trace.h"
+#include "mac.h"
+
+#include <linux/log2.h>
+
+#define HTT_RX_RING_SIZE HTT_RX_RING_SIZE_MAX
+#define HTT_RX_RING_FILL_LEVEL (((HTT_RX_RING_SIZE) / 2) - 1)
+
+/* when under memory pressure rx ring refill may fail and needs a retry */
+#define HTT_RX_RING_REFILL_RETRY_MS 50
+
+static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb);
+static void ath10k_htt_txrx_compl_task(unsigned long ptr);
+
+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;
+}
+
+static void ath10k_htt_rx_ring_free(struct ath10k_htt *htt)
+{
+ struct sk_buff *skb;
+ struct ath10k_skb_rxcb *rxcb;
+ struct hlist_node *n;
+ int i;
+
+ 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);
+ }
+ }
+
+ htt->rx_ring.fill_cnt = 0;
+ 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]));
+}
+
+static int __ath10k_htt_rx_ring_fill_n(struct ath10k_htt *htt, int num)
+{
+ struct htt_rx_desc *rx_desc;
+ struct ath10k_skb_rxcb *rxcb;
+ struct sk_buff *skb;
+ dma_addr_t paddr;
+ int ret = 0, idx;
+
+ /* 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);
+
+ idx = __le32_to_cpu(*htt->rx_ring.alloc_idx.vaddr);
+ 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;
+ }
+
+ rxcb = ATH10K_SKB_RXCB(skb);
+ rxcb->paddr = paddr;
+ htt->rx_ring.netbufs_ring[idx] = skb;
+ htt->rx_ring.paddrs_ring[idx] = __cpu_to_le32(paddr);
+ htt->rx_ring.fill_cnt++;
+
+ if (htt->rx_ring.in_ord_rx) {
+ hash_add(htt->rx_ring.skb_table,
+ &ATH10K_SKB_RXCB(skb)->hlist,
+ (u32)paddr);
+ }
+
+ num--;
+ idx++;
+ idx &= htt->rx_ring.size_mask;
+ }
+
+fail:
+ /*
+ * Make sure the rx buffer is updated before available buffer
+ * index to avoid any potential rx ring corruption.
+ */
+ mb();
+ *htt->rx_ring.alloc_idx.vaddr = __cpu_to_le32(idx);
+ 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)
+{
+ int ret, num_deficit, num_to_fill;
+
+ /* 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
+ * improves the average and stability. */
+ spin_lock_bh(&htt->rx_ring.lock);
+ 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;
+ 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));
+ } else if (num_deficit > 0) {
+ tasklet_schedule(&htt->rx_replenish_task);
+ }
+ 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;
+
+ ath10k_htt_rx_msdu_buff_replenish(htt);
+}
+
+int ath10k_htt_rx_ring_refill(struct ath10k *ar)
+{
+ struct ath10k_htt *htt = &ar->htt;
+ int ret;
+
+ 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);
+
+ if (ret)
+ ath10k_htt_rx_ring_free(htt);
+
+ return ret;
+}
+
+void ath10k_htt_rx_free(struct ath10k_htt *htt)
+{
+ del_timer_sync(&htt->rx_ring.refill_retry_timer);
+ tasklet_kill(&htt->rx_replenish_task);
+ tasklet_kill(&htt->txrx_compl_task);
+
+ skb_queue_purge(&htt->tx_compl_q);
+ skb_queue_purge(&htt->rx_compl_q);
+ skb_queue_purge(&htt->rx_in_ord_compl_q);
+
+ ath10k_htt_rx_ring_free(htt);
+
+ 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)
+{
+ struct ath10k *ar = htt->ar;
+ int idx;
+ struct sk_buff *msdu;
+
+ lockdep_assert_held(&htt->rx_ring.lock);
+
+ if (htt->rx_ring.fill_cnt == 0) {
+ ath10k_warn(ar, "tried to pop sk_buff from an empty rx ring\n");
+ return NULL;
+ }
+
+ idx = htt->rx_ring.sw_rd_idx.msdu_payld;
+ msdu = htt->rx_ring.netbufs_ring[idx];
+ htt->rx_ring.netbufs_ring[idx] = NULL;
+ htt->rx_ring.paddrs_ring[idx] = 0;
+
+ idx++;
+ idx &= htt->rx_ring.size_mask;
+ htt->rx_ring.sw_rd_idx.msdu_payld = idx;
+ htt->rx_ring.fill_cnt--;
+
+ dma_unmap_single(htt->ar->dev,
+ ATH10K_SKB_RXCB(msdu)->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;
+}
+
+/* return: < 0 fatal error, 0 - non chained msdu, 1 chained msdu */
+static int ath10k_htt_rx_amsdu_pop(struct ath10k_htt *htt,
+ u8 **fw_desc, int *fw_desc_len,
+ struct sk_buff_head *amsdu)
+{
+ struct ath10k *ar = htt->ar;
+ int msdu_len, msdu_chaining = 0;
+ struct sk_buff *msdu;
+ struct htt_rx_desc *rx_desc;
+
+ lockdep_assert_held(&htt->rx_ring.lock);
+
+ for (;;) {
+ int last_msdu, msdu_len_invalid, msdu_chained;
+
+ msdu = ath10k_htt_rx_netbuf_pop(htt);
+ if (!msdu) {
+ __skb_queue_purge(amsdu);
+ return -ENOENT;
+ }
+
+ __skb_queue_tail(amsdu, msdu);
+
+ 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)) {
+ __skb_queue_purge(amsdu);
+ return -EIO;
+ }
+
+ /*
+ * 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));
+ msdu_len = MS(__le32_to_cpu(rx_desc->msdu_start.info0),
+ 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;
+
+ /* Note: Chained buffers do not contain rx descriptor */
+ while (msdu_chained--) {
+ msdu = ath10k_htt_rx_netbuf_pop(htt);
+ if (!msdu) {
+ __skb_queue_purge(amsdu);
+ return -ENOENT;
+ }
+
+ __skb_queue_tail(amsdu, msdu);
+ skb_trim(msdu, 0);
+ skb_put(msdu, min(msdu_len, HTT_RX_BUF_SIZE));
+ msdu_len -= msdu->len;
+ msdu_chaining = 1;
+ }
+
+ last_msdu = __le32_to_cpu(rx_desc->msdu_end.info0) &
+ RX_MSDU_END_INFO0_LAST_MSDU;
+
+ trace_ath10k_htt_rx_desc(ar, &rx_desc->attention,
+ sizeof(*rx_desc) - sizeof(u32));
+
+ if (last_msdu)
+ break;
+ }
+
+ if (skb_queue_empty(amsdu))
+ msdu_chaining = -1;
+
+ /*
+ * 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;
+}
+
+static void ath10k_htt_rx_replenish_task(unsigned long ptr)
+{
+ struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
+
+ ath10k_htt_rx_msdu_buff_replenish(htt);
+}
+
+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;
+}
+
+int ath10k_htt_rx_alloc(struct ath10k_htt *htt)
+{
+ struct ath10k *ar = htt->ar;
+ dma_addr_t paddr;
+ void *vaddr;
+ size_t size;
+ struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
+
+ htt->rx_confused = false;
+
+ /* 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;
+
+ if (!is_power_of_2(htt->rx_ring.size)) {
+ ath10k_warn(ar, "htt rx ring size is not power of 2\n");
+ return -EINVAL;
+ }
+
+ htt->rx_ring.netbufs_ring =
+ kzalloc(htt->rx_ring.size * sizeof(struct sk_buff *),
+ GFP_KERNEL);
+ if (!htt->rx_ring.netbufs_ring)
+ goto err_netbuf;
+
+ size = htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring);
+
+ vaddr = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_DMA);
+ 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),
+ &paddr, GFP_DMA);
+ if (!vaddr)
+ goto err_dma_idx;
+
+ htt->rx_ring.alloc_idx.vaddr = vaddr;
+ htt->rx_ring.alloc_idx.paddr = paddr;
+ htt->rx_ring.sw_rd_idx.msdu_payld = htt->rx_ring.size_mask;
+ *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;
+ htt->rx_ring.sw_rd_idx.msdu_payld = 0;
+ hash_init(htt->rx_ring.skb_table);
+
+ tasklet_init(&htt->rx_replenish_task, ath10k_htt_rx_replenish_task,
+ (unsigned long)htt);
+
+ skb_queue_head_init(&htt->tx_compl_q);
+ skb_queue_head_init(&htt->rx_compl_q);
+ skb_queue_head_init(&htt->rx_in_ord_compl_q);
+
+ tasklet_init(&htt->txrx_compl_task, ath10k_htt_txrx_compl_task,
+ (unsigned long)htt);
+
+ ath10k_dbg(ar, ATH10K_DBG_BOOT, "htt rx ring size %d fill_level %d\n",
+ 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;
+}
+
+static int ath10k_htt_rx_crypto_param_len(struct ath10k *ar,
+ enum htt_rx_mpdu_encrypt_type type)
+{
+ switch (type) {
+ case HTT_RX_MPDU_ENCRYPT_NONE:
+ return 0;
+ case HTT_RX_MPDU_ENCRYPT_WEP40:
+ case HTT_RX_MPDU_ENCRYPT_WEP104:
+ return IEEE80211_WEP_IV_LEN;
+ case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
+ case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
+ return IEEE80211_TKIP_IV_LEN;
+ case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
+ return IEEE80211_CCMP_HDR_LEN;
+ case HTT_RX_MPDU_ENCRYPT_WEP128:
+ case HTT_RX_MPDU_ENCRYPT_WAPI:
+ break;
+ }
+
+ ath10k_warn(ar, "unsupported encryption type %d\n", type);
+ return 0;
+}
+
+#define MICHAEL_MIC_LEN 8
+
+static int ath10k_htt_rx_crypto_tail_len(struct ath10k *ar,
+ enum htt_rx_mpdu_encrypt_type type)
+{
+ switch (type) {
+ case HTT_RX_MPDU_ENCRYPT_NONE:
+ return 0;
+ case HTT_RX_MPDU_ENCRYPT_WEP40:
+ case HTT_RX_MPDU_ENCRYPT_WEP104:
+ return IEEE80211_WEP_ICV_LEN;
+ case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
+ case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
+ return IEEE80211_TKIP_ICV_LEN;
+ case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
+ return IEEE80211_CCMP_MIC_LEN;
+ case HTT_RX_MPDU_ENCRYPT_WEP128:
+ case HTT_RX_MPDU_ENCRYPT_WAPI:
+ break;
+ }
+
+ ath10k_warn(ar, "unsupported encryption type %d\n", type);
+ return 0;
+}
+
+struct rfc1042_hdr {
+ u8 llc_dsap;
+ u8 llc_ssap;
+ u8 llc_ctrl;
+ u8 snap_oui[3];
+ __be16 snap_type;
+} __packed;
+
+struct amsdu_subframe_hdr {
+ u8 dst[ETH_ALEN];
+ u8 src[ETH_ALEN];
+ __be16 len;
+} __packed;
+
+static const u8 rx_legacy_rate_idx[] = {
+ 3, /* 0x00 - 11Mbps */
+ 2, /* 0x01 - 5.5Mbps */
+ 1, /* 0x02 - 2Mbps */
+ 0, /* 0x03 - 1Mbps */
+ 3, /* 0x04 - 11Mbps */
+ 2, /* 0x05 - 5.5Mbps */
+ 1, /* 0x06 - 2Mbps */
+ 0, /* 0x07 - 1Mbps */
+ 10, /* 0x08 - 48Mbps */
+ 8, /* 0x09 - 24Mbps */
+ 6, /* 0x0A - 12Mbps */
+ 4, /* 0x0B - 6Mbps */
+ 11, /* 0x0C - 54Mbps */
+ 9, /* 0x0D - 36Mbps */
+ 7, /* 0x0E - 18Mbps */
+ 5, /* 0x0F - 9Mbps */
+};
+
+static void ath10k_htt_rx_h_rates(struct ath10k *ar,
+ struct ieee80211_rx_status *status,
+ struct htt_rx_desc *rxd)
+{
+ enum ieee80211_band band;
+ u8 cck, rate, rate_idx, bw, sgi, mcs, nss;
+ u8 preamble = 0;
+ u32 info1, info2, info3;
+
+ /* Band value can't be set as undefined but freq can be 0 - use that to
+ * determine whether band is provided.
+ *
+ * FIXME: Perhaps this can go away if CCK rate reporting is a little
+ * reworked?
+ */
+ if (!status->freq)
+ return;
+
+ band = status->band;
+ 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);
+
+ switch (preamble) {
+ case HTT_RX_LEGACY:
+ cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT;
+ rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE);
+ rate_idx = 0;
+
+ if (rate < 0x08 || rate > 0x0F)
+ break;
+
+ switch (band) {
+ case IEEE80211_BAND_2GHZ:
+ if (cck)
+ rate &= ~BIT(3);
+ rate_idx = rx_legacy_rate_idx[rate];
+ break;
+ case IEEE80211_BAND_5GHZ:
+ rate_idx = rx_legacy_rate_idx[rate];
+ /* We are using same rate table registering
+ HW - ath10k_rates[]. In case of 5GHz skip
+ CCK rates, so -4 here */
+ rate_idx -= 4;
+ break;
+ default:
+ break;
+ }
+
+ status->rate_idx = rate_idx;
+ break;
+ case HTT_RX_HT:
+ case HTT_RX_HT_WITH_TXBF:
+ /* HT-SIG - Table 20-11 in info2 and info3 */
+ mcs = info2 & 0x1F;
+ nss = mcs >> 3;
+ bw = (info2 >> 7) & 1;
+ sgi = (info3 >> 7) & 1;
+
+ 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:
+ /* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3
+ TODO check this */
+ mcs = (info3 >> 4) & 0x0F;
+ nss = ((info2 >> 10) & 0x07) + 1;
+ bw = info2 & 3;
+ sgi = info3 & 1;
+
+ 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;
+ }
+}
+
+static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
+ struct ieee80211_rx_status *status)
+{
+ struct ieee80211_channel *ch;
+
+ spin_lock_bh(&ar->data_lock);
+ ch = ar->scan_channel;
+ if (!ch)
+ ch = ar->rx_channel;
+ spin_unlock_bh(&ar->data_lock);
+
+ if (!ch)
+ return false;
+
+ status->band = ch->band;
+ status->freq = ch->center_freq;
+
+ return true;
+}
+
+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?
+ */
+ status->mactime = __le32_to_cpu(rxd->ppdu_end.common.tsf_timestamp);
+ status->flag |= RX_FLAG_MACTIME_END;
+}
+
+static void ath10k_htt_rx_h_ppdu(struct ath10k *ar,
+ struct sk_buff_head *amsdu,
+ struct ieee80211_rx_status *status)
+{
+ 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);
+ ath10k_htt_rx_h_channel(ar, status);
+ ath10k_htt_rx_h_rates(ar, status, rxd);
+ }
+
+ if (is_last_ppdu)
+ ath10k_htt_rx_h_mactime(ar, status, rxd);
+}
+
+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;
+}
+
+static void ath10k_process_rx(struct ath10k *ar,
+ struct ieee80211_rx_status *rx_status,
+ struct sk_buff *skb)
+{
+ struct ieee80211_rx_status *status;
+ struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
+ char tid[32];
+
+ status = IEEE80211_SKB_RXCB(skb);
+ *status = *rx_status;
+
+ ath10k_dbg(ar, ATH10K_DBG_DATA,
+ "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",
+ skb,
+ skb->len,
+ 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,
+ 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,
+ status->band, status->flag,
+ !!(status->flag & RX_FLAG_FAILED_FCS_CRC),
+ !!(status->flag & RX_FLAG_MMIC_ERROR),
+ !!(status->flag & RX_FLAG_AMSDU_MORE));
+ ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "rx skb: ",
+ skb->data, skb->len);
+ trace_ath10k_rx_hdr(ar, skb->data, skb->len);
+ trace_ath10k_rx_payload(ar, skb->data, skb->len);
+
+ ieee80211_rx(ar->hw, skb);
+}
+
+static int ath10k_htt_rx_nwifi_hdrlen(struct ieee80211_hdr *hdr)
+{
+ /* nwifi header is padded to 4 bytes. this fixes 4addr rx */
+ return round_up(ieee80211_hdrlen(hdr->frame_control), 4);
+}
+
+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)
+{
+ struct ieee80211_hdr *hdr;
+ struct htt_rx_desc *rxd;
+ size_t hdr_len;
+ size_t crypto_len;
+ bool is_first;
+ bool is_last;
+
+ rxd = (void *)msdu->data - sizeof(*rxd);
+ is_first = !!(rxd->msdu_end.info0 &
+ __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
+ is_last = !!(rxd->msdu_end.info0 &
+ __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
+ * to deliver them as-is without stripping the crypto param. This would
+ * also make sense for software based decryption (which is not
+ * implemented in ath10k).
+ *
+ * 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])
+{
+ struct ieee80211_hdr *hdr;
+ size_t hdr_len;
+ u8 da[ETH_ALEN];
+ u8 sa[ETH_ALEN];
+
+ /* 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.
+ */
+
+ /* pull decapped header and copy SA & DA */
+ hdr = (struct ieee80211_hdr *)msdu->data;
+ hdr_len = ath10k_htt_rx_nwifi_hdrlen(hdr);
+ ether_addr_copy(da, ieee80211_get_DA(hdr));
+ ether_addr_copy(sa, ieee80211_get_SA(hdr));
+ skb_pull(msdu, hdr_len);
+
+ /* 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_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;
+
+ rxd = (void *)msdu->data - sizeof(*rxd);
+ hdr = (void *)rxd->rx_hdr_status;
+
+ is_first = !!(rxd->msdu_end.info0 &
+ __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU));
+ is_last = !!(rxd->msdu_end.info0 &
+ __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU));
+ is_amsdu = !(is_first && is_last);
+
+ rfc1042 = hdr;
+
+ if (is_first) {
+ hdr_len = ieee80211_hdrlen(hdr->frame_control);
+ crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
+
+ rfc1042 += round_up(hdr_len, 4) +
+ round_up(crypto_len, 4);
+ }
+
+ if (is_amsdu)
+ rfc1042 += sizeof(struct amsdu_subframe_hdr);
+
+ return rfc1042;
+}
+
+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)
+{
+ struct ieee80211_hdr *hdr;
+ struct ethhdr *eth;
+ size_t hdr_len;
+ void *rfc1042;
+ u8 da[ETH_ALEN];
+ u8 sa[ETH_ALEN];
+
+ /* 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;
+ hdr_len = ieee80211_hdrlen(hdr->frame_control);
+ memcpy(skb_push(msdu, hdr_len), hdr, hdr_len);
+}
+
+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;
+ struct ieee80211_hdr *hdr;
+
+ /* 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);
+ hdr = (void *)rxd->rx_hdr_status;
+ decap = MS(__le32_to_cpu(rxd->msdu_start.info1),
+ RX_MSDU_START_INFO1_DECAP_FORMAT);
+
+ switch (decap) {
+ case RX_MSDU_DECAP_RAW:
+ ath10k_htt_rx_h_undecap_raw(ar, msdu, status, enctype,
+ is_decrypted);
+ break;
+ case RX_MSDU_DECAP_NATIVE_WIFI:
+ ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr);
+ break;
+ case RX_MSDU_DECAP_ETHERNET2_DIX:
+ ath10k_htt_rx_h_undecap_eth(ar, msdu, status, first_hdr, enctype);
+ break;
+ case RX_MSDU_DECAP_8023_SNAP_LLC:
+ ath10k_htt_rx_h_undecap_snap(ar, msdu, status, first_hdr);
+ break;
+ }
+}
+
+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);
+ info = __le32_to_cpu(rxd->msdu_start.info1);
+
+ 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;
+}
+
+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);
+ }
+}
+
+static int ath10k_unchain_msdu(struct sk_buff_head *amsdu)
+{
+ struct sk_buff *skb, *first;
+ 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?
+ */
+
+ first = __skb_dequeue(amsdu);
+
+ /* Allocate total length all at once. */
+ skb_queue_walk(amsdu, skb)
+ total_len += skb->len;
+
+ space = total_len - skb_tailroom(first);
+ if ((space > 0) &&
+ (pskb_expand_head(first, 0, space, GFP_ATOMIC) < 0)) {
+ /* TODO: bump some rx-oom error stat */
+ /* put it back together so we can free the
+ * whole list at once.
+ */
+ __skb_queue_head(amsdu, first);
+ return -1;
+ }
+
+ /* Walk list again, copying contents into
+ * msdu_head
+ */
+ while ((skb = __skb_dequeue(amsdu))) {
+ skb_copy_from_linear_data(skb, skb_put(first, skb->len),
+ skb->len);
+ dev_kfree_skb_any(skb);
+ }
+
+ __skb_queue_head(amsdu, first);
+ return 0;
+}
+
+static void ath10k_htt_rx_h_unchain(struct ath10k *ar,
+ struct sk_buff_head *amsdu,
+ bool chained)
+{
+ struct sk_buff *first;
+ struct htt_rx_desc *rxd;
+ enum rx_msdu_decap_format decap;
+
+ first = skb_peek(amsdu);
+ rxd = (void *)first->data - sizeof(*rxd);
+ decap = MS(__le32_to_cpu(rxd->msdu_start.info1),
+ RX_MSDU_START_INFO1_DECAP_FORMAT);
+
+ 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;
+ }
+
+ 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;
+ bool is_mgmt;
+ bool has_fcs_err;
+
+ 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");
+ return false;
+ }
+
+ 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));
+
+ /* 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.
+ *
+ * However some firmware revisions don't report corrupted frames via
+ * WMI so don't drop them.
+ */
+ if (is_mgmt && !has_fcs_err) {
+ ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx mgmt ctrl\n");
+ return false;
+ }
+
+ if (test_bit(ATH10K_CAC_RUNNING, &ar->dev_flags)) {
+ ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx cac running\n");
+ return false;
+ }
+
+ return true;
+}
+
+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);
+}
+
+static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
+ struct htt_rx_indication *rx)
+{
+ struct ath10k *ar = htt->ar;
+ struct ieee80211_rx_status *rx_status = &htt->rx_status;
+ struct htt_rx_indication_mpdu_range *mpdu_ranges;
+ struct sk_buff_head amsdu;
+ int num_mpdu_ranges;
+ int fw_desc_len;
+ u8 *fw_desc;
+ int i, ret, mpdu_count = 0;
+
+ lockdep_assert_held(&htt->rx_ring.lock);
+
+ if (htt->rx_confused)
+ return;
+
+ 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);
+
+ ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
+ rx, sizeof(*rx) +
+ (sizeof(struct htt_rx_indication_mpdu_range) *
+ num_mpdu_ranges));
+
+ 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,
+ &fw_desc_len, &amsdu);
+ if (ret < 0) {
+ ath10k_warn(ar, "rx ring became corrupted: %d\n", ret);
+ __skb_queue_purge(&amsdu);
+ /* FIXME: It's probably a good idea to reboot the
+ * device instead of leaving it inoperable.
+ */
+ htt->rx_confused = true;
+ break;
+ }
+
+ ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status);
+ 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);
+ }
+
+ tasklet_schedule(&htt->rx_replenish_task);
+}
+
+static void ath10k_htt_rx_frag_handler(struct ath10k_htt *htt,
+ struct htt_rx_fragment_indication *frag)
+{
+ struct ath10k *ar = htt->ar;
+ struct ieee80211_rx_status *rx_status = &htt->rx_status;
+ struct sk_buff_head amsdu;
+ int ret;
+ u8 *fw_desc;
+ int fw_desc_len;
+
+ fw_desc_len = __le16_to_cpu(frag->fw_rx_desc_bytes);
+ fw_desc = (u8 *)frag->fw_msdu_rx_desc;
+
+ __skb_queue_head_init(&amsdu);
+
+ spin_lock_bh(&htt->rx_ring.lock);
+ ret = ath10k_htt_rx_amsdu_pop(htt, &fw_desc, &fw_desc_len,
+ &amsdu);
+ spin_unlock_bh(&htt->rx_ring.lock);
+
+ tasklet_schedule(&htt->rx_replenish_task);
+
+ ath10k_dbg(ar, ATH10K_DBG_HTT_DUMP, "htt rx frag ahead\n");
+
+ if (ret) {
+ ath10k_warn(ar, "failed to pop amsdu from httr rx ring for fragmented rx %d\n",
+ ret);
+ __skb_queue_purge(&amsdu);
+ return;
+ }
+
+ if (skb_queue_len(&amsdu) != 1) {
+ ath10k_warn(ar, "failed to pop frag amsdu: too many msdus\n");
+ __skb_queue_purge(&amsdu);
+ return;
+ }
+
+ ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status);
+ 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);
+
+ if (fw_desc_len > 0) {
+ ath10k_dbg(ar, ATH10K_DBG_HTT,
+ "expecting more fragmented rx in one indication %d\n",
+ fw_desc_len);
+ }
+}
+
+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;
+
+ lockdep_assert_held(&htt->tx_lock);
+
+ switch (status) {
+ case HTT_DATA_TX_STATUS_NO_ACK:
+ tx_done.no_ack = true;
+ break;
+ case HTT_DATA_TX_STATUS_OK:
+ 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:
+ ath10k_warn(ar, "unhandled tx completion status %d\n", status);
+ tx_done.discard = true;
+ break;
+ }
+
+ ath10k_dbg(ar, ATH10K_DBG_HTT, "htt tx completion num_msdus %d\n",
+ 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);
+ }
+}
+
+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);
+
+ ath10k_dbg(ar, ATH10K_DBG_HTT,
+ "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) {
+ ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
+ peer_id);
+ spin_unlock_bh(&ar->data_lock);
+ return;
+ }
+
+ arvif = ath10k_get_arvif(ar, peer->vdev_id);
+ if (!arvif) {
+ ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
+ peer->vdev_id);
+ spin_unlock_bh(&ar->data_lock);
+ return;
+ }
+
+ ath10k_dbg(ar, ATH10K_DBG_HTT,
+ "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);
+
+ ath10k_dbg(ar, ATH10K_DBG_HTT,
+ "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) {
+ ath10k_warn(ar, "received addba event for invalid peer_id: %hu\n",
+ peer_id);
+ spin_unlock_bh(&ar->data_lock);
+ return;
+ }
+
+ arvif = ath10k_get_arvif(ar, peer->vdev_id);
+ if (!arvif) {
+ ath10k_warn(ar, "received addba event for invalid vdev_id: %u\n",
+ peer->vdev_id);
+ spin_unlock_bh(&ar->data_lock);
+ return;
+ }
+
+ ath10k_dbg(ar, ATH10K_DBG_HTT,
+ "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);
+}
+
+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);
+ if (rxd->msdu_end.info0 &
+ __cpu_to_le32(RX_MSDU_END_INFO0_LAST_MSDU))
+ break;
+ }
+
+ msdu = skb_peek_tail(amsdu);
+ rxd = (void *)msdu->data - sizeof(*rxd);
+ if (!(rxd->msdu_end.info0 &
+ __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);
+ ath10k_htt_rx_h_channel(ar, status);
+ 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.
+ */
+ ath10k_htt_rx_h_ppdu(ar, &amsdu, status);
+ 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);
+}
+
+void ath10k_htt_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb)
+{
+ struct ath10k_htt *htt = &ar->htt;
+ struct htt_resp *resp = (struct htt_resp *)skb->data;
+
+ /* confirm alignment */
+ if (!IS_ALIGNED((unsigned long)skb->data, 4))
+ ath10k_warn(ar, "unaligned htt message, expect trouble\n");
+
+ ath10k_dbg(ar, ATH10K_DBG_HTT, "htt rx, msg_type: 0x%0X\n",
+ resp->hdr.msg_type);
+ switch (resp->hdr.msg_type) {
+ 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;
+ }
+ case HTT_T2H_MSG_TYPE_RX_IND:
+ spin_lock_bh(&htt->rx_ring.lock);
+ __skb_queue_tail(&htt->rx_compl_q, skb);
+ spin_unlock_bh(&htt->rx_ring.lock);
+ tasklet_schedule(&htt->txrx_compl_task);
+ return;
+ 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:
+ break;
+ case HTT_MGMT_TX_STATUS_RETRY:
+ tx_done.no_ack = true;
+ break;
+ case HTT_MGMT_TX_STATUS_DROP:
+ tx_done.discard = true;
+ break;
+ }
+
+ spin_lock_bh(&htt->tx_lock);
+ ath10k_txrx_tx_unref(htt, &tx_done);
+ spin_unlock_bh(&htt->tx_lock);
+ break;
+ }
+ case HTT_T2H_MSG_TYPE_TX_COMPL_IND:
+ spin_lock_bh(&htt->tx_lock);
+ __skb_queue_tail(&htt->tx_compl_q, skb);
+ spin_unlock_bh(&htt->tx_lock);
+ tasklet_schedule(&htt->txrx_compl_task);
+ return;
+ case HTT_T2H_MSG_TYPE_SEC_IND: {
+ struct ath10k *ar = htt->ar;
+ struct htt_security_indication *ev = &resp->security_indication;
+
+ ath10k_dbg(ar, ATH10K_DBG_HTT,
+ "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: {
+ ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
+ skb->data, skb->len);
+ ath10k_htt_rx_frag_handler(htt, &resp->rx_frag_ind);
+ break;
+ }
+ case HTT_T2H_MSG_TYPE_TEST:
+ /* FIX THIS */
+ break;
+ case HTT_T2H_MSG_TYPE_STATS_CONF:
+ trace_ath10k_htt_stats(ar, skb->data, skb->len);
+ break;
+ case HTT_T2H_MSG_TYPE_TX_INSPECT_IND:
+ /* 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.
+ */
+ ath10k_warn(ar, "received an unexpected htt tx inspect event\n");
+ break;
+ case HTT_T2H_MSG_TYPE_RX_ADDBA:
+ ath10k_htt_rx_addba(ar, resp);
+ break;
+ case HTT_T2H_MSG_TYPE_RX_DELBA:
+ ath10k_htt_rx_delba(ar, resp);
+ break;
+ 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;
+ }
+ case HTT_T2H_MSG_TYPE_RX_FLUSH: {
+ /* Ignore this event because mac80211 takes care of Rx
+ * aggregation reordering.
+ */
+ break;
+ }
+ case HTT_T2H_MSG_TYPE_RX_IN_ORD_PADDR_IND: {
+ spin_lock_bh(&htt->rx_ring.lock);
+ __skb_queue_tail(&htt->rx_in_ord_compl_q, skb);
+ spin_unlock_bh(&htt->rx_ring.lock);
+ tasklet_schedule(&htt->txrx_compl_task);
+ return;
+ }
+ case HTT_T2H_MSG_TYPE_TX_CREDIT_UPDATE_IND:
+ /* FIXME: This WMI-TLV event is overlapping with 10.2
+ * CHAN_CHANGE - both being 0xF. Neither is being used in
+ * practice so no immediate action is necessary. Nevertheless
+ * HTT may need an abstraction layer like WMI has one day.
+ */
+ break;
+ default:
+ ath10k_warn(ar, "htt event (%d) not handled\n",
+ resp->hdr.msg_type);
+ ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt event: ",
+ skb->data, skb->len);
+ break;
+ };
+
+ /* Free the indication buffer */
+ dev_kfree_skb_any(skb);
+}
+
+static void ath10k_htt_txrx_compl_task(unsigned long ptr)
+{
+ struct ath10k_htt *htt = (struct ath10k_htt *)ptr;
+ struct ath10k *ar = htt->ar;
+ struct htt_resp *resp;
+ struct sk_buff *skb;
+
+ spin_lock_bh(&htt->tx_lock);
+ while ((skb = __skb_dequeue(&htt->tx_compl_q))) {
+ ath10k_htt_rx_frm_tx_compl(htt->ar, skb);
+ dev_kfree_skb_any(skb);
+ }
+ spin_unlock_bh(&htt->tx_lock);
+
+ spin_lock_bh(&htt->rx_ring.lock);
+ while ((skb = __skb_dequeue(&htt->rx_compl_q))) {
+ resp = (struct htt_resp *)skb->data;
+ ath10k_htt_rx_handler(htt, &resp->rx_ind);
+ dev_kfree_skb_any(skb);
+ }
+
+ while ((skb = __skb_dequeue(&htt->rx_in_ord_compl_q))) {
+ ath10k_htt_rx_in_ord_ind(ar, skb);
+ dev_kfree_skb_any(skb);
+ }
+ spin_unlock_bh(&htt->rx_ring.lock);
+}
Code Review / kvmfornfv.git / blobdiff