| /* |
| * 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 |
| |
| #define HTT_RX_RING_REFILL_RESCHED_MS 5 |
| |
| static int ath10k_htt_rx_get_csum_state(struct sk_buff *skb); |
| |
| 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) { |
| mod_timer(&htt->rx_ring.refill_retry_timer, jiffies + |
| msecs_to_jiffies(HTT_RX_RING_REFILL_RESCHED_MS)); |
| } |
| 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); |
| |
| skb_queue_purge(&htt->rx_compl_q); |
| skb_queue_purge(&htt->rx_in_ord_compl_q); |
| skb_queue_purge(&htt->tx_fetch_ind_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, |
| 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; |
| } |
| |
| 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.common.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.common.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 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_KERNEL); |
| 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_KERNEL); |
| 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); |
| |
| skb_queue_head_init(&htt->rx_compl_q); |
| skb_queue_head_init(&htt->rx_in_ord_compl_q); |
| skb_queue_head_init(&htt->tx_fetch_ind_q); |
| atomic_set(&htt->num_mpdus_ready, 0); |
| |
| 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 amsdu_subframe_hdr { |
| u8 dst[ETH_ALEN]; |
| u8 src[ETH_ALEN]; |
| __be16 len; |
| } __packed; |
| |
| #define GROUP_ID_IS_SU_MIMO(x) ((x) == 0 || (x) == 63) |
| |
| static void ath10k_htt_rx_h_rates(struct ath10k *ar, |
| struct ieee80211_rx_status *status, |
| struct htt_rx_desc *rxd) |
| { |
| struct ieee80211_supported_band *sband; |
| u8 cck, rate, bw, sgi, mcs, nss; |
| u8 preamble = 0; |
| u8 group_id; |
| u32 info1, info2, info3; |
| |
| 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: |
| /* To get legacy rate index band is required. Since band can't |
| * be undefined check if freq is non-zero. |
| */ |
| if (!status->freq) |
| return; |
| |
| cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT; |
| rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE); |
| rate &= ~RX_PPDU_START_RATE_FLAG; |
| |
| sband = &ar->mac.sbands[status->band]; |
| status->rate_idx = ath10k_mac_hw_rate_to_idx(sband, rate, cck); |
| 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->encoding = RX_ENC_HT; |
| if (sgi) |
| status->enc_flags |= RX_ENC_FLAG_SHORT_GI; |
| if (bw) |
| status->bw = RATE_INFO_BW_40; |
| break; |
| case HTT_RX_VHT: |
| case HTT_RX_VHT_WITH_TXBF: |
| /* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3 |
| * TODO check this |
| */ |
| bw = info2 & 3; |
| sgi = info3 & 1; |
| 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; |
| } |
| |
| 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); |
| } |
| |
| status->rate_idx = mcs; |
| status->nss = nss; |
| |
| if (sgi) |
| status->enc_flags |= RX_ENC_FLAG_SHORT_GI; |
| |
| switch (bw) { |
| /* 20MHZ */ |
| case 0: |
| break; |
| /* 40MHZ */ |
| case 1: |
| status->bw = RATE_INFO_BW_40; |
| break; |
| /* 80MHZ */ |
| case 2: |
| status->bw = RATE_INFO_BW_80; |
| break; |
| case 3: |
| status->bw = RATE_INFO_BW_160; |
| break; |
| } |
| |
| status->encoding = RX_ENC_VHT; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| 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; |
| |
| if (!(rxd->msdu_end.common.info0 & |
| __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 (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; |
| } |
| |
| static bool ath10k_htt_rx_h_channel(struct ath10k *ar, |
| struct ieee80211_rx_status *status, |
| struct htt_rx_desc *rxd, |
| u32 vdev_id) |
| { |
| struct ieee80211_channel *ch; |
| |
| spin_lock_bh(&ar->data_lock); |
| ch = ar->scan_channel; |
| if (!ch) |
| ch = ar->rx_channel; |
| 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); |
| if (!ch) |
| ch = ar->tgt_oper_chan; |
| 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) |
| { |
| int i; |
| |
| for (i = 0; i < IEEE80211_MAX_CHAINS ; i++) { |
| status->chains &= ~BIT(i); |
| |
| if (rxd->ppdu_start.rssi_chains[i].pri20_mhz != 0x80) { |
| status->chain_signal[i] = ATH10K_DEFAULT_NOISE_FLOOR + |
| rxd->ppdu_start.rssi_chains[i].pri20_mhz; |
| |
| status->chains |= BIT(i); |
| } |
| } |
| |
| /* 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, |
| u32 vdev_id) |
| { |
| 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->nss = 0; |
| status->encoding = RX_ENC_LEGACY; |
| status->bw = RATE_INFO_BW_20; |
| |
| status->flag &= ~RX_FLAG_MACTIME_END; |
| status->flag |= RX_FLAG_NO_SIGNAL_VAL; |
| |
| status->flag &= ~(RX_FLAG_AMPDU_IS_LAST); |
| status->flag |= RX_FLAG_AMPDU_DETAILS | RX_FLAG_AMPDU_LAST_KNOWN; |
| status->ampdu_reference = ar->ampdu_reference; |
| |
| ath10k_htt_rx_h_signal(ar, status, rxd); |
| ath10k_htt_rx_h_channel(ar, status, rxd, vdev_id); |
| ath10k_htt_rx_h_rates(ar, status, rxd); |
| } |
| |
| if (is_last_ppdu) { |
| ath10k_htt_rx_h_mactime(ar, status, rxd); |
| |
| /* set ampdu last segment flag */ |
| status->flag |= RX_FLAG_AMPDU_IS_LAST; |
| ar->ampdu_reference++; |
| } |
| } |
| |
| 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 %pK len %u peer %pM %s %s sn %u %s%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->encoding == RX_ENC_LEGACY) ? "legacy" : "", |
| (status->encoding == RX_ENC_HT) ? "ht" : "", |
| (status->encoding == RX_ENC_VHT) ? "vht" : "", |
| (status->bw == RATE_INFO_BW_40) ? "40" : "", |
| (status->bw == RATE_INFO_BW_80) ? "80" : "", |
| (status->bw == RATE_INFO_BW_160) ? "160" : "", |
| status->enc_flags & RX_ENC_FLAG_SHORT_GI ? "sgi " : "", |
| status->rate_idx, |
| status->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_napi(ar->hw, NULL, skb, &ar->napi); |
| } |
| |
| static int ath10k_htt_rx_nwifi_hdrlen(struct ath10k *ar, |
| struct ieee80211_hdr *hdr) |
| { |
| int len = ieee80211_hdrlen(hdr->frame_control); |
| |
| if (!test_bit(ATH10K_FW_FEATURE_NO_NWIFI_DECAP_4ADDR_PADDING, |
| ar->running_fw->fw_file.fw_features)) |
| len = round_up(len, 4); |
| |
| return len; |
| } |
| |
| 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.common.info0 & |
| __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)); |
| is_last = !!(rxd->msdu_end.common.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 is |
| * necessary for software based decryption. |
| * |
| * 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 */ |
| if (status->flag & RX_FLAG_IV_STRIPPED) |
| skb_trim(msdu, msdu->len - |
| ath10k_htt_rx_crypto_tail_len(ar, enctype)); |
| |
| /* MMIC */ |
| if ((status->flag & RX_FLAG_MMIC_STRIPPED) && |
| !ieee80211_has_morefrags(hdr->frame_control) && |
| enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA) |
| skb_trim(msdu, msdu->len - 8); |
| |
| /* Head */ |
| if (status->flag & RX_FLAG_IV_STRIPPED) { |
| 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; |
| struct htt_rx_desc *rxd; |
| size_t hdr_len; |
| u8 da[ETH_ALEN]; |
| u8 sa[ETH_ALEN]; |
| int l3_pad_bytes; |
| |
| /* 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 */ |
| rxd = (void *)msdu->data - sizeof(*rxd); |
| |
| l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd); |
| skb_put(msdu, l3_pad_bytes); |
| |
| hdr = (struct ieee80211_hdr *)(msdu->data + l3_pad_bytes); |
| |
| hdr_len = ath10k_htt_rx_nwifi_hdrlen(ar, 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; |
| int bytes_aligned = ar->hw_params.decap_align_bytes; |
| |
| rxd = (void *)msdu->data - sizeof(*rxd); |
| hdr = (void *)rxd->rx_hdr_status; |
| |
| is_first = !!(rxd->msdu_end.common.info0 & |
| __cpu_to_le32(RX_MSDU_END_INFO0_FIRST_MSDU)); |
| is_last = !!(rxd->msdu_end.common.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, bytes_aligned) + |
| round_up(crypto_len, bytes_aligned); |
| } |
| |
| 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]; |
| int l3_pad_bytes; |
| struct htt_rx_desc *rxd; |
| |
| /* 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; |
| |
| rxd = (void *)msdu->data - sizeof(*rxd); |
| l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd); |
| skb_put(msdu, l3_pad_bytes); |
| skb_pull(msdu, l3_pad_bytes); |
| |
| /* 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; |
| int l3_pad_bytes; |
| struct htt_rx_desc *rxd; |
| |
| /* Delivered decapped frame: |
| * [amsdu header] <-- replaced with 802.11 hdr |
| * [rfc1042/llc] |
| * [payload] |
| */ |
| |
| rxd = (void *)msdu->data - sizeof(*rxd); |
| l3_pad_bytes = ath10k_rx_desc_get_l3_pad_bytes(&ar->hw_params, rxd); |
| |
| skb_put(msdu, l3_pad_bytes); |
| skb_pull(msdu, sizeof(struct amsdu_subframe_hdr) + l3_pad_bytes); |
| |
| 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; |
| |
| /* 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); |
| decap = MS(__le32_to_cpu(rxd->msdu_start.common.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.common.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; |
| bool is_mgmt; |
| u32 attention; |
| |
| if (skb_queue_empty(amsdu)) |
| return; |
| |
| first = skb_peek(amsdu); |
| rxd = (void *)first->data - sizeof(*rxd); |
| |
| is_mgmt = !!(rxd->attention.flags & |
| __cpu_to_le32(RX_ATTENTION_FLAGS_MGMT_TYPE)); |
| |
| 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_ONLY_MONITOR | |
| 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; |
| |
| /* Firmware reports all necessary management frames via WMI already. |
| * They are not reported to monitor interfaces at all so pass the ones |
| * coming via HTT to monitor interfaces instead. This simplifies |
| * matters a lot. |
| */ |
| if (is_mgmt) |
| status->flag |= RX_FLAG_ONLY_MONITOR; |
| |
| if (is_decrypted) { |
| status->flag |= RX_FLAG_DECRYPTED; |
| |
| if (likely(!is_mgmt)) |
| status->flag |= 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; |
| if (is_mgmt) |
| 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) |
| { |
| 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.common.info1), |
| RX_MSDU_START_INFO1_DECAP_FORMAT); |
| |
| /* 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) |
| { |
| /* FIXME: It might be a good idea to do some fuzzy-testing to drop |
| * invalid/dangerous frames. |
| */ |
| |
| if (!rx_status->freq) { |
| ath10k_dbg(ar, ATH10K_DBG_HTT, "no channel configured; ignoring frame(s)!\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 int ath10k_htt_rx_handle_amsdu(struct ath10k_htt *htt) |
| { |
| struct ath10k *ar = htt->ar; |
| struct ieee80211_rx_status *rx_status = &htt->rx_status; |
| struct sk_buff_head amsdu; |
| int ret, num_msdus; |
| |
| __skb_queue_head_init(&amsdu); |
| |
| spin_lock_bh(&htt->rx_ring.lock); |
| if (htt->rx_confused) { |
| spin_unlock_bh(&htt->rx_ring.lock); |
| return -EIO; |
| } |
| ret = ath10k_htt_rx_amsdu_pop(htt, &amsdu); |
| spin_unlock_bh(&htt->rx_ring.lock); |
| |
| 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; |
| return ret; |
| } |
| |
| num_msdus = skb_queue_len(&amsdu); |
| ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status, 0xffff); |
| |
| /* only for ret = 1 indicates chained msdus */ |
| if (ret > 0) |
| ath10k_htt_rx_h_unchain(ar, &amsdu); |
| |
| 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); |
| |
| return num_msdus; |
| } |
| |
| static void ath10k_htt_rx_proc_rx_ind(struct ath10k_htt *htt, |
| struct htt_rx_indication *rx) |
| { |
| struct ath10k *ar = htt->ar; |
| struct htt_rx_indication_mpdu_range *mpdu_ranges; |
| int num_mpdu_ranges; |
| int i, mpdu_count = 0; |
| |
| 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; |
| |
| atomic_add(mpdu_count, &htt->num_mpdus_ready); |
| } |
| |
| static void ath10k_htt_rx_tx_compl_ind(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.status = HTT_TX_COMPL_STATE_NOACK; |
| break; |
| case HTT_DATA_TX_STATUS_OK: |
| tx_done.status = HTT_TX_COMPL_STATE_ACK; |
| break; |
| case HTT_DATA_TX_STATUS_DISCARD: |
| case HTT_DATA_TX_STATUS_POSTPONE: |
| case HTT_DATA_TX_STATUS_DOWNLOAD_FAIL: |
| tx_done.status = HTT_TX_COMPL_STATE_DISCARD; |
| break; |
| default: |
| ath10k_warn(ar, "unhandled tx completion status %d\n", status); |
| tx_done.status = HTT_TX_COMPL_STATE_DISCARD; |
| 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); |
| |
| /* kfifo_put: In practice firmware shouldn't fire off per-CE |
| * interrupt and main interrupt (MSI/-X range case) for the same |
| * HTC service so it should be safe to use kfifo_put w/o lock. |
| * |
| * From kfifo_put() documentation: |
| * Note that with only one concurrent reader and one concurrent |
| * writer, you don't need extra locking to use these macro. |
| */ |
| if (!kfifo_put(&htt->txdone_fifo, tx_done)) { |
| ath10k_warn(ar, "txdone fifo overrun, msdu_id %d status %d\n", |
| tx_done.msdu_id, tx_done.status); |
| 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, |
| int budget_left) |
| { |
| 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)) && budget_left) { |
| __skb_queue_tail(amsdu, msdu); |
| budget_left--; |
| |
| rxd = (void *)msdu->data - sizeof(*rxd); |
| if (rxd->msdu_end.common.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.common.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 int 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; |
| int num_msdu = 0; |
| |
| 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, NULL, rx->vdev_id); |
| ath10k_process_rx(ar, status, msdu); |
| num_msdu++; |
| } |
| return num_msdu; |
| } |
| |
| static int ath10k_htt_rx_in_ord_ind(struct ath10k *ar, struct sk_buff *skb, |
| int budget_left) |
| { |
| 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, num_msdus = 0; |
| |
| lockdep_assert_held(&htt->rx_ring.lock); |
| |
| if (htt->rx_confused) |
| return -EIO; |
| |
| 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 -EINVAL; |
| } |
| |
| /* 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 -EIO; |
| } |
| |
| /* Offloaded frames are very different and need to be handled |
| * separately. |
| */ |
| if (offload) |
| num_msdus = ath10k_htt_rx_h_rx_offload(ar, &list); |
| |
| while (!skb_queue_empty(&list) && budget_left) { |
| __skb_queue_head_init(&amsdu); |
| ret = ath10k_htt_rx_extract_amsdu(&list, &amsdu, budget_left); |
| 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. |
| */ |
| num_msdus += skb_queue_len(&amsdu); |
| budget_left -= skb_queue_len(&amsdu); |
| ath10k_htt_rx_h_ppdu(ar, &amsdu, status, vdev_id); |
| 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 -EIO; |
| } |
| } |
| return num_msdus; |
| } |
| |
| 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 ieee80211_hw *hw = ar->hw; |
| struct ieee80211_txq *txq; |
| 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; |
| size_t num_bytes; |
| size_t num_msdus; |
| const __le32 *resp_ids; |
| u16 num_records; |
| u16 num_resp_ids; |
| u16 peer_id; |
| u8 tid; |
| int ret; |
| 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)); |
| |
| if (!ar->htt.tx_q_state.enabled) { |
| ath10k_warn(ar, "received unexpected tx_fetch_ind event: not enabled\n"); |
| return; |
| } |
| |
| if (ar->htt.tx_q_state.mode == HTT_TX_MODE_SWITCH_PUSH) { |
| ath10k_warn(ar, "received unexpected tx_fetch_ind event: in push mode\n"); |
| return; |
| } |
| |
| rcu_read_lock(); |
| |
| 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; |
| } |
| |
| spin_lock_bh(&ar->data_lock); |
| txq = ath10k_mac_txq_lookup(ar, peer_id, tid); |
| spin_unlock_bh(&ar->data_lock); |
| |
| /* It is okay to release the lock and use txq because RCU read |
| * lock is held. |
| */ |
| |
| if (unlikely(!txq)) { |
| ath10k_warn(ar, "failed to lookup txq for peer_id %hu tid %hhu\n", |
| peer_id, tid); |
| continue; |
| } |
| |
| num_msdus = 0; |
| num_bytes = 0; |
| |
| while (num_msdus < max_num_msdus && |
| num_bytes < max_num_bytes) { |
| ret = ath10k_mac_tx_push_txq(hw, txq); |
| if (ret < 0) |
| break; |
| |
| num_msdus++; |
| num_bytes += ret; |
| } |
| |
| record->num_msdus = cpu_to_le16(num_msdus); |
| record->num_bytes = cpu_to_le32(num_bytes); |
| |
| ath10k_htt_tx_txq_recalc(hw, txq); |
| } |
| |
| rcu_read_unlock(); |
| |
| 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); |
| |
| ret = ath10k_htt_tx_fetch_resp(ar, |
| resp->tx_fetch_ind.token, |
| resp->tx_fetch_ind.fetch_seq_num, |
| resp->tx_fetch_ind.records, |
| num_records); |
| if (unlikely(ret)) { |
| ath10k_warn(ar, "failed to submit tx fetch resp for token 0x%08x: %d\n", |
| le32_to_cpu(resp->tx_fetch_ind.token), ret); |
| /* FIXME: request fw restart */ |
| } |
| |
| ath10k_htt_tx_txq_sync(ar); |
| } |
| |
| 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; |
| struct ieee80211_txq *txq; |
| struct ath10k_txq *artxq; |
| 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; |
| |
| ar->htt.tx_q_state.enabled = enable; |
| ar->htt.tx_q_state.mode = mode; |
| ar->htt.tx_q_state.num_push_allowed = threshold; |
| |
| rcu_read_lock(); |
| |
| 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; |
| } |
| |
| spin_lock_bh(&ar->data_lock); |
| txq = ath10k_mac_txq_lookup(ar, peer_id, tid); |
| spin_unlock_bh(&ar->data_lock); |
| |
| /* It is okay to release the lock and use txq because RCU read |
| * lock is held. |
| */ |
| |
| if (unlikely(!txq)) { |
| ath10k_warn(ar, "failed to lookup txq for peer_id %hu tid %hhu\n", |
| peer_id, tid); |
| continue; |
| } |
| |
| spin_lock_bh(&ar->htt.tx_lock); |
| artxq = (void *)txq->drv_priv; |
| artxq->num_push_allowed = le16_to_cpu(record->num_max_msdus); |
| spin_unlock_bh(&ar->htt.tx_lock); |
| } |
| |
| rcu_read_unlock(); |
| |
| ath10k_mac_tx_push_pending(ar); |
| } |
| |
| void ath10k_htt_htc_t2h_msg_handler(struct ath10k *ar, struct sk_buff *skb) |
| { |
| bool release; |
| |
| release = ath10k_htt_t2h_msg_handler(ar, skb); |
| |
| /* Free the indication buffer */ |
| if (release) |
| dev_kfree_skb_any(skb); |
| } |
| |
| static inline bool is_valid_legacy_rate(u8 rate) |
| { |
| static const u8 legacy_rates[] = {1, 2, 5, 11, 6, 9, 12, |
| 18, 24, 36, 48, 54}; |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(legacy_rates); i++) { |
| if (rate == legacy_rates[i]) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static void |
| ath10k_update_per_peer_tx_stats(struct ath10k *ar, |
| struct ieee80211_sta *sta, |
| struct ath10k_per_peer_tx_stats *peer_stats) |
| { |
| struct ath10k_sta *arsta = (struct ath10k_sta *)sta->drv_priv; |
| u8 rate = 0, sgi; |
| struct rate_info txrate; |
| |
| lockdep_assert_held(&ar->data_lock); |
| |
| txrate.flags = ATH10K_HW_PREAMBLE(peer_stats->ratecode); |
| txrate.bw = ATH10K_HW_BW(peer_stats->flags); |
| txrate.nss = ATH10K_HW_NSS(peer_stats->ratecode); |
| txrate.mcs = ATH10K_HW_MCS_RATE(peer_stats->ratecode); |
| sgi = ATH10K_HW_GI(peer_stats->flags); |
| |
| if (txrate.flags == WMI_RATE_PREAMBLE_VHT && txrate.mcs > 9) { |
| ath10k_warn(ar, "Invalid VHT mcs %hhd peer stats", txrate.mcs); |
| return; |
| } |
| |
| if (txrate.flags == WMI_RATE_PREAMBLE_HT && |
| (txrate.mcs > 7 || txrate.nss < 1)) { |
| ath10k_warn(ar, "Invalid HT mcs %hhd nss %hhd peer stats", |
| txrate.mcs, txrate.nss); |
| return; |
| } |
| |
| memset(&arsta->txrate, 0, sizeof(arsta->txrate)); |
| |
| if (txrate.flags == WMI_RATE_PREAMBLE_CCK || |
| txrate.flags == WMI_RATE_PREAMBLE_OFDM) { |
| rate = ATH10K_HW_LEGACY_RATE(peer_stats->ratecode); |
| |
| if (!is_valid_legacy_rate(rate)) { |
| ath10k_warn(ar, "Invalid legacy rate %hhd peer stats", |
| rate); |
| return; |
| } |
| |
| /* This is hacky, FW sends CCK rate 5.5Mbps as 6 */ |
| rate *= 10; |
| if (rate == 60 && txrate.flags == WMI_RATE_PREAMBLE_CCK) |
| rate = rate - 5; |
| arsta->txrate.legacy = rate; |
| } else if (txrate.flags == WMI_RATE_PREAMBLE_HT) { |
| arsta->txrate.flags = RATE_INFO_FLAGS_MCS; |
| arsta->txrate.mcs = txrate.mcs + 8 * (txrate.nss - 1); |
| } else { |
| arsta->txrate.flags = RATE_INFO_FLAGS_VHT_MCS; |
| arsta->txrate.mcs = txrate.mcs; |
| } |
| |
| if (sgi) |
| arsta->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI; |
| |
| arsta->txrate.nss = txrate.nss; |
| arsta->txrate.bw = txrate.bw + RATE_INFO_BW_20; |
| } |
| |
| static void ath10k_htt_fetch_peer_stats(struct ath10k *ar, |
| struct sk_buff *skb) |
| { |
| struct htt_resp *resp = (struct htt_resp *)skb->data; |
| struct ath10k_per_peer_tx_stats *p_tx_stats = &ar->peer_tx_stats; |
| struct htt_per_peer_tx_stats_ind *tx_stats; |
| struct ieee80211_sta *sta; |
| struct ath10k_peer *peer; |
| int peer_id, i; |
| u8 ppdu_len, num_ppdu; |
| |
| num_ppdu = resp->peer_tx_stats.num_ppdu; |
| ppdu_len = resp->peer_tx_stats.ppdu_len * sizeof(__le32); |
| |
| if (skb->len < sizeof(struct htt_resp_hdr) + num_ppdu * ppdu_len) { |
| ath10k_warn(ar, "Invalid peer stats buf length %d\n", skb->len); |
| return; |
| } |
| |
| tx_stats = (struct htt_per_peer_tx_stats_ind *) |
| (resp->peer_tx_stats.payload); |
| peer_id = __le16_to_cpu(tx_stats->peer_id); |
| |
| rcu_read_lock(); |
| spin_lock_bh(&ar->data_lock); |
| peer = ath10k_peer_find_by_id(ar, peer_id); |
| if (!peer) { |
| ath10k_warn(ar, "Invalid peer id %d peer stats buffer\n", |
| peer_id); |
| goto out; |
| } |
| |
| sta = peer->sta; |
| for (i = 0; i < num_ppdu; i++) { |
| tx_stats = (struct htt_per_peer_tx_stats_ind *) |
| (resp->peer_tx_stats.payload + i * ppdu_len); |
| |
| p_tx_stats->succ_bytes = __le32_to_cpu(tx_stats->succ_bytes); |
| p_tx_stats->retry_bytes = __le32_to_cpu(tx_stats->retry_bytes); |
| p_tx_stats->failed_bytes = |
| __le32_to_cpu(tx_stats->failed_bytes); |
| p_tx_stats->ratecode = tx_stats->ratecode; |
| p_tx_stats->flags = tx_stats->flags; |
| p_tx_stats->succ_pkts = __le16_to_cpu(tx_stats->succ_pkts); |
| p_tx_stats->retry_pkts = __le16_to_cpu(tx_stats->retry_pkts); |
| p_tx_stats->failed_pkts = __le16_to_cpu(tx_stats->failed_pkts); |
| |
| ath10k_update_per_peer_tx_stats(ar, sta, p_tx_stats); |
| } |
| |
| out: |
| spin_unlock_bh(&ar->data_lock); |
| rcu_read_unlock(); |
| } |
| |
| bool 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; |
| enum htt_t2h_msg_type type; |
| |
| /* 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); |
| |
| 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); |
| return true; |
| } |
| type = ar->htt.t2h_msg_types[resp->hdr.msg_type]; |
| |
| switch (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: |
| ath10k_htt_rx_proc_rx_ind(htt, &resp->rx_ind); |
| break; |
| 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: |
| tx_done.status = HTT_TX_COMPL_STATE_ACK; |
| break; |
| case HTT_MGMT_TX_STATUS_RETRY: |
| tx_done.status = HTT_TX_COMPL_STATE_NOACK; |
| break; |
| case HTT_MGMT_TX_STATUS_DROP: |
| tx_done.status = HTT_TX_COMPL_STATE_DISCARD; |
| break; |
| } |
| |
| status = ath10k_txrx_tx_unref(htt, &tx_done); |
| if (!status) { |
| spin_lock_bh(&htt->tx_lock); |
| ath10k_htt_tx_mgmt_dec_pending(htt); |
| spin_unlock_bh(&htt->tx_lock); |
| } |
| break; |
| } |
| case HTT_T2H_MSG_TYPE_TX_COMPL_IND: |
| ath10k_htt_rx_tx_compl_ind(htt->ar, skb); |
| break; |
| 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); |
| atomic_inc(&htt->num_mpdus_ready); |
| break; |
| } |
| case HTT_T2H_MSG_TYPE_TEST: |
| 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: { |
| trace_ath10k_htt_pktlog(ar, resp->pktlog_msg.payload, |
| skb->len - |
| offsetof(struct htt_resp, |
| pktlog_msg.payload)); |
| 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: { |
| __skb_queue_tail(&htt->rx_in_ord_compl_q, skb); |
| return false; |
| } |
| case HTT_T2H_MSG_TYPE_TX_CREDIT_UPDATE_IND: |
| break; |
| case HTT_T2H_MSG_TYPE_CHAN_CHANGE: { |
| u32 phymode = __le32_to_cpu(resp->chan_change.phymode); |
| u32 freq = __le32_to_cpu(resp->chan_change.freq); |
| |
| ar->tgt_oper_chan = ieee80211_get_channel(ar->hw->wiphy, freq); |
| ath10k_dbg(ar, ATH10K_DBG_HTT, |
| "htt chan change freq %u phymode %s\n", |
| freq, ath10k_wmi_phymode_str(phymode)); |
| break; |
| } |
| case HTT_T2H_MSG_TYPE_AGGR_CONF: |
| break; |
| case HTT_T2H_MSG_TYPE_TX_FETCH_IND: { |
| struct sk_buff *tx_fetch_ind = skb_copy(skb, GFP_ATOMIC); |
| |
| if (!tx_fetch_ind) { |
| ath10k_warn(ar, "failed to copy htt tx fetch ind\n"); |
| break; |
| } |
| skb_queue_tail(&htt->tx_fetch_ind_q, tx_fetch_ind); |
| break; |
| } |
| case HTT_T2H_MSG_TYPE_TX_FETCH_CONFIRM: |
| ath10k_htt_rx_tx_fetch_confirm(ar, skb); |
| break; |
| case HTT_T2H_MSG_TYPE_TX_MODE_SWITCH_IND: |
| ath10k_htt_rx_tx_mode_switch_ind(ar, skb); |
| break; |
| case HTT_T2H_MSG_TYPE_PEER_STATS: |
| ath10k_htt_fetch_peer_stats(ar, skb); |
| break; |
| case HTT_T2H_MSG_TYPE_EN_STATS: |
| 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; |
| } |
| return true; |
| } |
| EXPORT_SYMBOL(ath10k_htt_t2h_msg_handler); |
| |
| void ath10k_htt_rx_pktlog_completion_handler(struct ath10k *ar, |
| struct sk_buff *skb) |
| { |
| trace_ath10k_htt_pktlog(ar, skb->data, skb->len); |
| dev_kfree_skb_any(skb); |
| } |
| EXPORT_SYMBOL(ath10k_htt_rx_pktlog_completion_handler); |
| |
| int ath10k_htt_txrx_compl_task(struct ath10k *ar, int budget) |
| { |
| struct ath10k_htt *htt = &ar->htt; |
| struct htt_tx_done tx_done = {}; |
| struct sk_buff_head tx_ind_q; |
| struct sk_buff *skb; |
| unsigned long flags; |
| int quota = 0, done, num_rx_msdus; |
| bool resched_napi = false; |
| |
| __skb_queue_head_init(&tx_ind_q); |
| |
| /* Since in-ord-ind can deliver more than 1 A-MSDU in single event, |
| * process it first to utilize full available quota. |
| */ |
| while (quota < budget) { |
| if (skb_queue_empty(&htt->rx_in_ord_compl_q)) |
| break; |
| |
| skb = __skb_dequeue(&htt->rx_in_ord_compl_q); |
| if (!skb) { |
| resched_napi = true; |
| goto exit; |
| } |
| |
| spin_lock_bh(&htt->rx_ring.lock); |
| num_rx_msdus = ath10k_htt_rx_in_ord_ind(ar, skb, |
| (budget - quota)); |
| spin_unlock_bh(&htt->rx_ring.lock); |
| if (num_rx_msdus < 0) { |
| resched_napi = true; |
| goto exit; |
| } |
| |
| dev_kfree_skb_any(skb); |
| if (num_rx_msdus > 0) |
| quota += num_rx_msdus; |
| |
| if ((quota > ATH10K_NAPI_QUOTA_LIMIT) && |
| !skb_queue_empty(&htt->rx_in_ord_compl_q)) { |
| resched_napi = true; |
| goto exit; |
| } |
| } |
| |
| while (quota < budget) { |
| /* no more data to receive */ |
| if (!atomic_read(&htt->num_mpdus_ready)) |
| break; |
| |
| num_rx_msdus = ath10k_htt_rx_handle_amsdu(htt); |
| if (num_rx_msdus < 0) { |
| resched_napi = true; |
| goto exit; |
| } |
| |
| quota += num_rx_msdus; |
| atomic_dec(&htt->num_mpdus_ready); |
| if ((quota > ATH10K_NAPI_QUOTA_LIMIT) && |
| atomic_read(&htt->num_mpdus_ready)) { |
| resched_napi = true; |
| goto exit; |
| } |
| } |
| |
| /* From NAPI documentation: |
| * The napi poll() function may also process TX completions, in which |
| * case if it processes the entire TX ring then it should count that |
| * work as the rest of the budget. |
| */ |
| if ((quota < budget) && !kfifo_is_empty(&htt->txdone_fifo)) |
| quota = budget; |
| |
| /* kfifo_get: called only within txrx_tasklet so it's neatly serialized. |
| * From kfifo_get() documentation: |
| * Note that with only one concurrent reader and one concurrent writer, |
| * you don't need extra locking to use these macro. |
| */ |
| while (kfifo_get(&htt->txdone_fifo, &tx_done)) |
| ath10k_txrx_tx_unref(htt, &tx_done); |
| |
| ath10k_mac_tx_push_pending(ar); |
| |
| spin_lock_irqsave(&htt->tx_fetch_ind_q.lock, flags); |
| skb_queue_splice_init(&htt->tx_fetch_ind_q, &tx_ind_q); |
| spin_unlock_irqrestore(&htt->tx_fetch_ind_q.lock, flags); |
| |
| while ((skb = __skb_dequeue(&tx_ind_q))) { |
| ath10k_htt_rx_tx_fetch_ind(ar, skb); |
| dev_kfree_skb_any(skb); |
| } |
| |
| exit: |
| ath10k_htt_rx_msdu_buff_replenish(htt); |
| /* In case of rx failure or more data to read, report budget |
| * to reschedule NAPI poll |
| */ |
| done = resched_napi ? budget : quota; |
| |
| return done; |
| } |
| EXPORT_SYMBOL(ath10k_htt_txrx_compl_task); |