blob: adbaeb67eedf1e8b96e363777b7491ddfbfbfa16 [file] [log] [blame]
// SPDX-License-Identifier: ISC
/*
* Copyright (c) 2005-2011 Atheros Communications Inc.
* Copyright (c) 2011-2017 Qualcomm Atheros, Inc.
* Copyright (c) 2018, The Linux Foundation. All rights reserved.
*/
#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>
#include <linux/bitfield.h>
/* 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, u64 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 size_t ath10k_htt_get_rx_ring_size_32(struct ath10k_htt *htt)
{
return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_32);
}
static size_t ath10k_htt_get_rx_ring_size_64(struct ath10k_htt *htt)
{
return htt->rx_ring.size * sizeof(htt->rx_ring.paddrs_ring_64);
}
static void ath10k_htt_config_paddrs_ring_32(struct ath10k_htt *htt,
void *vaddr)
{
htt->rx_ring.paddrs_ring_32 = vaddr;
}
static void ath10k_htt_config_paddrs_ring_64(struct ath10k_htt *htt,
void *vaddr)
{
htt->rx_ring.paddrs_ring_64 = vaddr;
}
static void ath10k_htt_set_paddrs_ring_32(struct ath10k_htt *htt,
dma_addr_t paddr, int idx)
{
htt->rx_ring.paddrs_ring_32[idx] = __cpu_to_le32(paddr);
}
static void ath10k_htt_set_paddrs_ring_64(struct ath10k_htt *htt,
dma_addr_t paddr, int idx)
{
htt->rx_ring.paddrs_ring_64[idx] = __cpu_to_le64(paddr);
}
static void ath10k_htt_reset_paddrs_ring_32(struct ath10k_htt *htt, int idx)
{
htt->rx_ring.paddrs_ring_32[idx] = 0;
}
static void ath10k_htt_reset_paddrs_ring_64(struct ath10k_htt *htt, int idx)
{
htt->rx_ring.paddrs_ring_64[idx] = 0;
}
static void *ath10k_htt_get_vaddr_ring_32(struct ath10k_htt *htt)
{
return (void *)htt->rx_ring.paddrs_ring_32;
}
static void *ath10k_htt_get_vaddr_ring_64(struct ath10k_htt *htt)
{
return (void *)htt->rx_ring.paddrs_ring_64;
}
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);
if (idx < 0 || idx >= htt->rx_ring.size) {
ath10k_err(htt->ar, "rx ring index is not valid, firmware malfunctioning?\n");
idx &= htt->rx_ring.size_mask;
ret = -ENOMEM;
goto fail;
}
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;
ath10k_htt_set_paddrs_ring(htt, paddr, idx);
htt->rx_ring.fill_cnt++;
if (htt->rx_ring.in_ord_rx) {
hash_add(htt->rx_ring.skb_table,
&ATH10K_SKB_RXCB(skb)->hlist,
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(struct timer_list *t)
{
struct ath10k_htt *htt = from_timer(htt, t, rx_ring.refill_retry_timer);
ath10k_htt_rx_msdu_buff_replenish(htt);
}
int ath10k_htt_rx_ring_refill(struct ath10k *ar)
{
struct ath10k_htt *htt = &ar->htt;
int ret;
if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
return 0;
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));
if (ret)
ath10k_htt_rx_ring_free(htt);
spin_unlock_bh(&htt->rx_ring.lock);
return ret;
}
void ath10k_htt_rx_free(struct ath10k_htt *htt)
{
if (htt->ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
return;
del_timer_sync(&htt->rx_ring.refill_retry_timer);
skb_queue_purge(&htt->rx_msdus_q);
skb_queue_purge(&htt->rx_in_ord_compl_q);
skb_queue_purge(&htt->tx_fetch_ind_q);
spin_lock_bh(&htt->rx_ring.lock);
ath10k_htt_rx_ring_free(htt);
spin_unlock_bh(&htt->rx_ring.lock);
dma_free_coherent(htt->ar->dev,
ath10k_htt_get_rx_ring_size(htt),
ath10k_htt_get_vaddr_ring(htt),
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;
ath10k_htt_reset_paddrs_ring(htt, idx);
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,
u64 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 inline void ath10k_htt_append_frag_list(struct sk_buff *skb_head,
struct sk_buff *frag_list,
unsigned int frag_len)
{
skb_shinfo(skb_head)->frag_list = frag_list;
skb_head->data_len = frag_len;
skb_head->len += skb_head->data_len;
}
static int ath10k_htt_rx_handle_amsdu_mon_32(struct ath10k_htt *htt,
struct sk_buff *msdu,
struct htt_rx_in_ord_msdu_desc **msdu_desc)
{
struct ath10k *ar = htt->ar;
u32 paddr;
struct sk_buff *frag_buf;
struct sk_buff *prev_frag_buf;
u8 last_frag;
struct htt_rx_in_ord_msdu_desc *ind_desc = *msdu_desc;
struct htt_rx_desc *rxd;
int amsdu_len = __le16_to_cpu(ind_desc->msdu_len);
rxd = (void *)msdu->data;
trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
skb_put(msdu, sizeof(struct htt_rx_desc));
skb_pull(msdu, sizeof(struct htt_rx_desc));
skb_put(msdu, min(amsdu_len, HTT_RX_MSDU_SIZE));
amsdu_len -= msdu->len;
last_frag = ind_desc->reserved;
if (last_frag) {
if (amsdu_len) {
ath10k_warn(ar, "invalid amsdu len %u, left %d",
__le16_to_cpu(ind_desc->msdu_len),
amsdu_len);
}
return 0;
}
ind_desc++;
paddr = __le32_to_cpu(ind_desc->msdu_paddr);
frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
if (!frag_buf) {
ath10k_warn(ar, "failed to pop frag-1 paddr: 0x%x", paddr);
return -ENOENT;
}
skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
ath10k_htt_append_frag_list(msdu, frag_buf, amsdu_len);
amsdu_len -= frag_buf->len;
prev_frag_buf = frag_buf;
last_frag = ind_desc->reserved;
while (!last_frag) {
ind_desc++;
paddr = __le32_to_cpu(ind_desc->msdu_paddr);
frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
if (!frag_buf) {
ath10k_warn(ar, "failed to pop frag-n paddr: 0x%x",
paddr);
prev_frag_buf->next = NULL;
return -ENOENT;
}
skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
last_frag = ind_desc->reserved;
amsdu_len -= frag_buf->len;
prev_frag_buf->next = frag_buf;
prev_frag_buf = frag_buf;
}
if (amsdu_len) {
ath10k_warn(ar, "invalid amsdu len %u, left %d",
__le16_to_cpu(ind_desc->msdu_len), amsdu_len);
}
*msdu_desc = ind_desc;
prev_frag_buf->next = NULL;
return 0;
}
static int
ath10k_htt_rx_handle_amsdu_mon_64(struct ath10k_htt *htt,
struct sk_buff *msdu,
struct htt_rx_in_ord_msdu_desc_ext **msdu_desc)
{
struct ath10k *ar = htt->ar;
u64 paddr;
struct sk_buff *frag_buf;
struct sk_buff *prev_frag_buf;
u8 last_frag;
struct htt_rx_in_ord_msdu_desc_ext *ind_desc = *msdu_desc;
struct htt_rx_desc *rxd;
int amsdu_len = __le16_to_cpu(ind_desc->msdu_len);
rxd = (void *)msdu->data;
trace_ath10k_htt_rx_desc(ar, rxd, sizeof(*rxd));
skb_put(msdu, sizeof(struct htt_rx_desc));
skb_pull(msdu, sizeof(struct htt_rx_desc));
skb_put(msdu, min(amsdu_len, HTT_RX_MSDU_SIZE));
amsdu_len -= msdu->len;
last_frag = ind_desc->reserved;
if (last_frag) {
if (amsdu_len) {
ath10k_warn(ar, "invalid amsdu len %u, left %d",
__le16_to_cpu(ind_desc->msdu_len),
amsdu_len);
}
return 0;
}
ind_desc++;
paddr = __le64_to_cpu(ind_desc->msdu_paddr);
frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
if (!frag_buf) {
ath10k_warn(ar, "failed to pop frag-1 paddr: 0x%llx", paddr);
return -ENOENT;
}
skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
ath10k_htt_append_frag_list(msdu, frag_buf, amsdu_len);
amsdu_len -= frag_buf->len;
prev_frag_buf = frag_buf;
last_frag = ind_desc->reserved;
while (!last_frag) {
ind_desc++;
paddr = __le64_to_cpu(ind_desc->msdu_paddr);
frag_buf = ath10k_htt_rx_pop_paddr(htt, paddr);
if (!frag_buf) {
ath10k_warn(ar, "failed to pop frag-n paddr: 0x%llx",
paddr);
prev_frag_buf->next = NULL;
return -ENOENT;
}
skb_put(frag_buf, min(amsdu_len, HTT_RX_BUF_SIZE));
last_frag = ind_desc->reserved;
amsdu_len -= frag_buf->len;
prev_frag_buf->next = frag_buf;
prev_frag_buf = frag_buf;
}
if (amsdu_len) {
ath10k_warn(ar, "invalid amsdu len %u, left %d",
__le16_to_cpu(ind_desc->msdu_len), amsdu_len);
}
*msdu_desc = ind_desc;
prev_frag_buf->next = NULL;
return 0;
}
static int ath10k_htt_rx_pop_paddr32_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_descs32;
struct htt_rx_desc *rxd;
struct sk_buff *msdu;
int msdu_count, ret;
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;
}
if (!is_offload && ar->monitor_arvif) {
ret = ath10k_htt_rx_handle_amsdu_mon_32(htt, msdu,
&msdu_desc);
if (ret) {
__skb_queue_purge(list);
return ret;
}
__skb_queue_tail(list, msdu);
msdu_desc++;
continue;
}
__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;
}
static int ath10k_htt_rx_pop_paddr64_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_ext *msdu_desc = ev->msdu_descs64;
struct htt_rx_desc *rxd;
struct sk_buff *msdu;
int msdu_count, ret;
bool is_offload;
u64 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 = __le64_to_cpu(msdu_desc->msdu_paddr);
msdu = ath10k_htt_rx_pop_paddr(htt, paddr);
if (!msdu) {
__skb_queue_purge(list);
return -ENOENT;
}
if (!is_offload && ar->monitor_arvif) {
ret = ath10k_htt_rx_handle_amsdu_mon_64(htt, msdu,
&msdu_desc);
if (ret) {
__skb_queue_purge(list);
return ret;
}
__skb_queue_tail(list, msdu);
msdu_desc++;
continue;
}
__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, *vaddr_ring;
size_t size;
struct timer_list *timer = &htt->rx_ring.refill_retry_timer;
if (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL)
return 0;
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 = ar->hw_params.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 =
kcalloc(htt->rx_ring.size, sizeof(struct sk_buff *),
GFP_KERNEL);
if (!htt->rx_ring.netbufs_ring)
goto err_netbuf;
size = ath10k_htt_get_rx_ring_size(htt);
vaddr_ring = dma_alloc_coherent(htt->ar->dev, size, &paddr, GFP_KERNEL);
if (!vaddr_ring)
goto err_dma_ring;
ath10k_htt_config_paddrs_ring(htt, vaddr_ring);
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 */
timer_setup(timer, ath10k_htt_rx_ring_refill_retry, 0);
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_msdus_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,
ath10k_htt_get_rx_ring_size(htt),
vaddr_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_AES_CCM256_WPA2:
return IEEE80211_CCMP_256_HDR_LEN;
case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
return IEEE80211_GCMP_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_mic_len(struct ath10k *ar,
enum htt_rx_mpdu_encrypt_type type)
{
switch (type) {
case HTT_RX_MPDU_ENCRYPT_NONE:
case HTT_RX_MPDU_ENCRYPT_WEP40:
case HTT_RX_MPDU_ENCRYPT_WEP104:
case HTT_RX_MPDU_ENCRYPT_TKIP_WITHOUT_MIC:
case HTT_RX_MPDU_ENCRYPT_TKIP_WPA:
return 0;
case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
return IEEE80211_CCMP_MIC_LEN;
case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
return IEEE80211_CCMP_256_MIC_LEN;
case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
return IEEE80211_GCMP_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;
}
static int ath10k_htt_rx_crypto_icv_len(struct ath10k *ar,
enum htt_rx_mpdu_encrypt_type type)
{
switch (type) {
case HTT_RX_MPDU_ENCRYPT_NONE:
case HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2:
case HTT_RX_MPDU_ENCRYPT_AES_CCM256_WPA2:
case HTT_RX_MPDU_ENCRYPT_AES_GCMP_WPA2:
case HTT_RX_MPDU_ENCRYPT_AES_GCMP256_WPA2:
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_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 inline u8 ath10k_bw_to_mac80211_bw(u8 bw)
{
u8 ret = 0;
switch (bw) {
case 0:
ret = RATE_INFO_BW_20;
break;
case 1:
ret = RATE_INFO_BW_40;
break;
case 2:
ret = RATE_INFO_BW_80;
break;
case 3:
ret = RATE_INFO_BW_160;
break;
}
return ret;
}
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;
u32 stbc, nsts_su;
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;
stbc = (info2 >> 3) & 1;
group_id = (info2 >> 4) & 0x3F;
if (GROUP_ID_IS_SU_MIMO(group_id)) {
mcs = (info3 >> 4) & 0x0F;
nsts_su = ((info2 >> 10) & 0x07);
if (stbc)
nss = (nsts_su >> 2) + 1;
else
nss = (nsts_su + 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;
status->bw = ath10k_bw_to_mac80211_bw(bw);
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_htt_rx_h_queue_msdu(struct ath10k *ar,
struct ieee80211_rx_status *rx_status,
struct sk_buff *skb)
{
struct ieee80211_rx_status *status;
status = IEEE80211_SKB_RXCB(skb);
*status = *rx_status;
skb_queue_tail(&ar->htt.rx_msdus_q, skb);
}
static void ath10k_process_rx(struct ath10k *ar, 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);
if (!(ar->filter_flags & FIF_FCSFAIL) &&
status->flag & RX_FLAG_FAILED_FCS_CRC) {
ar->stats.rx_crc_err_drop++;
dev_kfree_skb_any(skb);
return;
}
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,
const u8 first_hdr[64])
{
struct ieee80211_hdr *hdr;
struct htt_rx_desc *rxd;
size_t hdr_len;
size_t crypto_len;
bool is_first;
bool is_last;
bool msdu_limit_err;
int bytes_aligned = ar->hw_params.decap_align_bytes;
u8 *qos;
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
*/
/* Some hardwares(QCA99x0 variants) limit number of msdus in a-msdu when
* deaggregate, so that unwanted MSDU-deaggregation is avoided for
* error packets. If limit exceeds, hw sends all remaining MSDUs as
* a single last MSDU with this msdu limit error set.
*/
msdu_limit_err = ath10k_rx_desc_msdu_limit_error(&ar->hw_params, rxd);
/* If MSDU limit error happens, then don't warn on, the partial raw MSDU
* without first MSDU is expected in that case, and handled later here.
*/
/* This probably shouldn't happen but warn just in case */
if (WARN_ON_ONCE(!is_first && !msdu_limit_err))
return;
/* This probably shouldn't happen but warn just in case */
if (WARN_ON_ONCE(!(is_first && is_last) && !msdu_limit_err))
return;
skb_trim(msdu, msdu->len - FCS_LEN);
/* Push original 80211 header */
if (unlikely(msdu_limit_err)) {
hdr = (struct ieee80211_hdr *)first_hdr;
hdr_len = ieee80211_hdrlen(hdr->frame_control);
crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
if (ieee80211_is_data_qos(hdr->frame_control)) {
qos = ieee80211_get_qos_ctl(hdr);
qos[0] |= IEEE80211_QOS_CTL_A_MSDU_PRESENT;
}
if (crypto_len)
memcpy(skb_push(msdu, crypto_len),
(void *)hdr + round_up(hdr_len, bytes_aligned),
crypto_len);
memcpy(skb_push(msdu, hdr_len), hdr, hdr_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_mic_len(ar, enctype));
skb_trim(msdu, msdu->len -
ath10k_htt_rx_crypto_icv_len(ar, enctype));
} else {
/* MIC */
if (status->flag & RX_FLAG_MIC_STRIPPED)
skb_trim(msdu, msdu->len -
ath10k_htt_rx_crypto_mic_len(ar, enctype));
/* ICV */
if (status->flag & RX_FLAG_ICV_STRIPPED)
skb_trim(msdu, msdu->len -
ath10k_htt_rx_crypto_icv_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 - MICHAEL_MIC_LEN);
/* 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],
enum htt_rx_mpdu_encrypt_type enctype)
{
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;
int bytes_aligned = ar->hw_params.decap_align_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);
if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
memcpy(skb_push(msdu,
ath10k_htt_rx_crypto_param_len(ar, enctype)),
(void *)hdr + round_up(hdr_len, bytes_aligned),
ath10k_htt_rx_crypto_param_len(ar, enctype));
}
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;
int bytes_aligned = ar->hw_params.decap_align_bytes;
/* 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);
if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
memcpy(skb_push(msdu,
ath10k_htt_rx_crypto_param_len(ar, enctype)),
(void *)hdr + round_up(hdr_len, bytes_aligned),
ath10k_htt_rx_crypto_param_len(ar, enctype));
}
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],
enum htt_rx_mpdu_encrypt_type enctype)
{
struct ieee80211_hdr *hdr;
size_t hdr_len;
int l3_pad_bytes;
struct htt_rx_desc *rxd;
int bytes_aligned = ar->hw_params.decap_align_bytes;
/* 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);
if (!(status->flag & RX_FLAG_IV_STRIPPED)) {
memcpy(skb_push(msdu,
ath10k_htt_rx_crypto_param_len(ar, enctype)),
(void *)hdr + round_up(hdr_len, bytes_aligned),
ath10k_htt_rx_crypto_param_len(ar, enctype));
}
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, first_hdr);
break;
case RX_MSDU_DECAP_NATIVE_WIFI:
ath10k_htt_rx_h_undecap_nwifi(ar, msdu, status, first_hdr,
enctype);
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,
enctype);
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 u64 ath10k_htt_rx_h_get_pn(struct ath10k *ar, struct sk_buff *skb,
u16 offset,
enum htt_rx_mpdu_encrypt_type enctype)
{
struct ieee80211_hdr *hdr;
u64 pn = 0;
u8 *ehdr;
hdr = (struct ieee80211_hdr *)(skb->data + offset);
ehdr = skb->data + offset + ieee80211_hdrlen(hdr->frame_control);
if (enctype == HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2) {
pn = ehdr[0];
pn |= (u64)ehdr[1] << 8;
pn |= (u64)ehdr[4] << 16;
pn |= (u64)ehdr[5] << 24;
pn |= (u64)ehdr[6] << 32;
pn |= (u64)ehdr[7] << 40;
}
return pn;
}
static bool ath10k_htt_rx_h_frag_multicast_check(struct ath10k *ar,
struct sk_buff *skb,
u16 offset)
{
struct ieee80211_hdr *hdr;
hdr = (struct ieee80211_hdr *)(skb->data + offset);
return !is_multicast_ether_addr(hdr->addr1);
}
static bool ath10k_htt_rx_h_frag_pn_check(struct ath10k *ar,
struct sk_buff *skb,
u16 peer_id,
u16 offset,
enum htt_rx_mpdu_encrypt_type enctype)
{
struct ath10k_peer *peer;
union htt_rx_pn_t *last_pn, new_pn = {0};
struct ieee80211_hdr *hdr;
u8 tid, frag_number;
u32 seq;
peer = ath10k_peer_find_by_id(ar, peer_id);
if (!peer) {
ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid peer for frag pn check\n");
return false;
}
hdr = (struct ieee80211_hdr *)(skb->data + offset);
if (ieee80211_is_data_qos(hdr->frame_control))
tid = ieee80211_get_tid(hdr);
else
tid = ATH10K_TXRX_NON_QOS_TID;
last_pn = &peer->frag_tids_last_pn[tid];
new_pn.pn48 = ath10k_htt_rx_h_get_pn(ar, skb, offset, enctype);
frag_number = le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_FRAG;
seq = (__le16_to_cpu(hdr->seq_ctrl) & IEEE80211_SCTL_SEQ) >> 4;
if (frag_number == 0) {
last_pn->pn48 = new_pn.pn48;
peer->frag_tids_seq[tid] = seq;
} else {
if (seq != peer->frag_tids_seq[tid])
return false;
if (new_pn.pn48 != last_pn->pn48 + 1)
return false;
last_pn->pn48 = new_pn.pn48;
}
return true;
}
static void ath10k_htt_rx_h_mpdu(struct ath10k *ar,
struct sk_buff_head *amsdu,
struct ieee80211_rx_status *status,
bool fill_crypt_header,
u8 *rx_hdr,
enum ath10k_pkt_rx_err *err,
u16 peer_id,
bool frag)
{
struct sk_buff *first;
struct sk_buff *last;
struct sk_buff *msdu, *temp;
struct htt_rx_desc *rxd;
struct ieee80211_hdr *hdr;
enum htt_rx_mpdu_encrypt_type enctype;
u8 first_hdr[64];
u8 *qos;
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;
bool frag_pn_check = true, multicast_check = true;
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;
memcpy(first_hdr, hdr, RX_HTT_HDR_STATUS_LEN);
if (rx_hdr)
memcpy(rx_hdr, hdr, RX_HTT_HDR_STATUS_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;
if (ieee80211_is_data_qos(hdr->frame_control)) {
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;
if (err) {
if (has_fcs_err)
*err = ATH10K_PKT_RX_ERR_FCS;
else if (has_tkip_err)
*err = ATH10K_PKT_RX_ERR_TKIP;
else if (has_crypto_err)
*err = ATH10K_PKT_RX_ERR_CRYPT;
else if (has_peer_idx_invalid)
*err = ATH10K_PKT_RX_ERR_PEER_IDX_INVAL;
}
/* 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_MMIC_STRIPPED;
if (fill_crypt_header)
status->flag |= RX_FLAG_MIC_STRIPPED |
RX_FLAG_ICV_STRIPPED;
else
status->flag |= RX_FLAG_IV_STRIPPED;
}
skb_queue_walk(amsdu, msdu) {
if (frag && !fill_crypt_header && is_decrypted &&
enctype == HTT_RX_MPDU_ENCRYPT_AES_CCM_WPA2)
frag_pn_check = ath10k_htt_rx_h_frag_pn_check(ar,
msdu,
peer_id,
0,
enctype);
if (frag)
multicast_check = ath10k_htt_rx_h_frag_multicast_check(ar,
msdu,
0);
if (!frag_pn_check || !multicast_check) {
/* Discard the fragment with invalid PN or multicast DA
*/
temp = msdu->prev;
__skb_unlink(msdu, amsdu);
dev_kfree_skb_any(msdu);
msdu = temp;
frag_pn_check = true;
multicast_check = true;
continue;
}
ath10k_htt_rx_h_csum_offload(msdu);
if (frag && !fill_crypt_header &&
enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
status->flag &= ~RX_FLAG_MMIC_STRIPPED;
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;
if (fill_crypt_header)
continue;
hdr = (void *)msdu->data;
hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
if (frag && !fill_crypt_header &&
enctype == HTT_RX_MPDU_ENCRYPT_TKIP_WPA)
status->flag &= ~RX_FLAG_IV_STRIPPED &
~RX_FLAG_MMIC_STRIPPED;
}
}
static void ath10k_htt_rx_h_enqueue(struct ath10k *ar,
struct sk_buff_head *amsdu,
struct ieee80211_rx_status *status)
{
struct sk_buff *msdu;
struct sk_buff *first_subframe;
first_subframe = skb_peek(amsdu);
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;
if (msdu == first_subframe) {
first_subframe = NULL;
status->flag &= ~RX_FLAG_ALLOW_SAME_PN;
} else {
status->flag |= RX_FLAG_ALLOW_SAME_PN;
}
ath10k_htt_rx_h_queue_msdu(ar, status, msdu);
}
}
static int ath10k_unchain_msdu(struct sk_buff_head *amsdu,
unsigned long *unchain_cnt)
{
struct sk_buff *skb, *first;
int space;
int total_len = 0;
int amsdu_len = skb_queue_len(amsdu);
/* 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);
*unchain_cnt += amsdu_len - 1;
return 0;
}
static void ath10k_htt_rx_h_unchain(struct ath10k *ar,
struct sk_buff_head *amsdu,
unsigned long *drop_cnt,
unsigned long *unchain_cnt)
{
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) {
*drop_cnt += skb_queue_len(amsdu);
__skb_queue_purge(amsdu);
return;
}
ath10k_unchain_msdu(amsdu, unchain_cnt);
}
static bool ath10k_htt_rx_validate_amsdu(struct ath10k *ar,
struct sk_buff_head *amsdu)
{
u8 *subframe_hdr;
struct sk_buff *first;
bool is_first, is_last;
struct htt_rx_desc *rxd;
struct ieee80211_hdr *hdr;
size_t hdr_len, crypto_len;
enum htt_rx_mpdu_encrypt_type enctype;
int bytes_aligned = ar->hw_params.decap_align_bytes;
first = skb_peek(amsdu);
rxd = (void *)first->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));
/* Return in case of non-aggregated msdu */
if (is_first && is_last)
return true;
/* First msdu flag is not set for the first msdu of the list */
if (!is_first)
return false;
enctype = MS(__le32_to_cpu(rxd->mpdu_start.info0),
RX_MPDU_START_INFO0_ENCRYPT_TYPE);
hdr_len = ieee80211_hdrlen(hdr->frame_control);
crypto_len = ath10k_htt_rx_crypto_param_len(ar, enctype);
subframe_hdr = (u8 *)hdr + round_up(hdr_len, bytes_aligned) +
crypto_len;
/* Validate if the amsdu has a proper first subframe.
* There are chances a single msdu can be received as amsdu when
* the unauthenticated amsdu flag of a QoS header
* gets flipped in non-SPP AMSDU's, in such cases the first
* subframe has llc/snap header in place of a valid da.
* return false if the da matches rfc1042 pattern
*/
if (ether_addr_equal(subframe_hdr, rfc1042_header))
return false;
return true;
}
static bool ath10k_htt_rx_amsdu_allowed(struct ath10k *ar,
struct sk_buff_head *amsdu,
struct ieee80211_rx_status *rx_status)
{
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;
}
if (!ath10k_htt_rx_validate_amsdu(ar, amsdu)) {
ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid amsdu received\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,
unsigned long *drop_cnt)
{
if (skb_queue_empty(amsdu))
return;
if (ath10k_htt_rx_amsdu_allowed(ar, amsdu, rx_status))
return;
if (drop_cnt)
*drop_cnt += skb_queue_len(amsdu);
__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;
unsigned long drop_cnt = 0;
unsigned long unchain_cnt = 0;
unsigned long drop_cnt_filter = 0;
unsigned long msdus_to_queue, num_msdus;
enum ath10k_pkt_rx_err err = ATH10K_PKT_RX_ERR_MAX;
u8 first_hdr[RX_HTT_HDR_STATUS_LEN];
__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, &drop_cnt, &unchain_cnt);
ath10k_htt_rx_h_filter(ar, &amsdu, rx_status, &drop_cnt_filter);
ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status, true, first_hdr, &err, 0,
false);
msdus_to_queue = skb_queue_len(&amsdu);
ath10k_htt_rx_h_enqueue(ar, &amsdu, rx_status);
ath10k_sta_update_rx_tid_stats(ar, first_hdr, num_msdus, err,
unchain_cnt, drop_cnt, drop_cnt_filter,
msdus_to_queue);
return 0;
}
static void ath10k_htt_rx_mpdu_desc_pn_hl(struct htt_hl_rx_desc *rx_desc,
union htt_rx_pn_t *pn,
int pn_len_bits)
{
switch (pn_len_bits) {
case 48:
pn->pn48 = __le32_to_cpu(rx_desc->pn_31_0) +
((u64)(__le32_to_cpu(rx_desc->u0.pn_63_32) & 0xFFFF) << 32);
break;
case 24:
pn->pn24 = __le32_to_cpu(rx_desc->pn_31_0);
break;
}
}
static bool ath10k_htt_rx_pn_cmp48(union htt_rx_pn_t *new_pn,
union htt_rx_pn_t *old_pn)
{
return ((new_pn->pn48 & 0xffffffffffffULL) <=
(old_pn->pn48 & 0xffffffffffffULL));
}
static bool ath10k_htt_rx_pn_check_replay_hl(struct ath10k *ar,
struct ath10k_peer *peer,
struct htt_rx_indication_hl *rx)
{
bool last_pn_valid, pn_invalid = false;
enum htt_txrx_sec_cast_type sec_index;
enum htt_security_types sec_type;
union htt_rx_pn_t new_pn = {0};
struct htt_hl_rx_desc *rx_desc;
union htt_rx_pn_t *last_pn;
u32 rx_desc_info, tid;
int num_mpdu_ranges;
lockdep_assert_held(&ar->data_lock);
if (!peer)
return false;
if (!(rx->fw_desc.flags & FW_RX_DESC_FLAGS_FIRST_MSDU))
return false;
num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
rx_desc = (struct htt_hl_rx_desc *)&rx->mpdu_ranges[num_mpdu_ranges];
rx_desc_info = __le32_to_cpu(rx_desc->info);
if (!MS(rx_desc_info, HTT_RX_DESC_HL_INFO_ENCRYPTED))
return false;
tid = MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
last_pn_valid = peer->tids_last_pn_valid[tid];
last_pn = &peer->tids_last_pn[tid];
if (MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST))
sec_index = HTT_TXRX_SEC_MCAST;
else
sec_index = HTT_TXRX_SEC_UCAST;
sec_type = peer->rx_pn[sec_index].sec_type;
ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
if (sec_type != HTT_SECURITY_AES_CCMP &&
sec_type != HTT_SECURITY_TKIP &&
sec_type != HTT_SECURITY_TKIP_NOMIC)
return false;
if (last_pn_valid)
pn_invalid = ath10k_htt_rx_pn_cmp48(&new_pn, last_pn);
else
peer->tids_last_pn_valid[tid] = true;
if (!pn_invalid)
last_pn->pn48 = new_pn.pn48;
return pn_invalid;
}
static bool ath10k_htt_rx_proc_rx_ind_hl(struct ath10k_htt *htt,
struct htt_rx_indication_hl *rx,
struct sk_buff *skb,
enum htt_rx_pn_check_type check_pn_type,
enum htt_rx_tkip_demic_type tkip_mic_type)
{
struct ath10k *ar = htt->ar;
struct ath10k_peer *peer;
struct htt_rx_indication_mpdu_range *mpdu_ranges;
struct fw_rx_desc_hl *fw_desc;
enum htt_txrx_sec_cast_type sec_index;
enum htt_security_types sec_type;
union htt_rx_pn_t new_pn = {0};
struct htt_hl_rx_desc *rx_desc;
struct ieee80211_hdr *hdr;
struct ieee80211_rx_status *rx_status;
u16 peer_id;
u8 rx_desc_len;
int num_mpdu_ranges;
size_t tot_hdr_len;
struct ieee80211_channel *ch;
bool pn_invalid, qos, first_msdu;
u32 tid, rx_desc_info;
peer_id = __le16_to_cpu(rx->hdr.peer_id);
tid = MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
spin_lock_bh(&ar->data_lock);
peer = ath10k_peer_find_by_id(ar, peer_id);
spin_unlock_bh(&ar->data_lock);
if (!peer && peer_id != HTT_INVALID_PEERID)
ath10k_warn(ar, "Got RX ind from invalid peer: %u\n", peer_id);
if (!peer)
return true;
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_hl(rx);
fw_desc = &rx->fw_desc;
rx_desc_len = fw_desc->len;
if (fw_desc->u.bits.discard) {
ath10k_dbg(ar, ATH10K_DBG_HTT, "htt discard mpdu\n");
goto err;
}
/* I have not yet seen any case where num_mpdu_ranges > 1.
* qcacld does not seem handle that case either, so we introduce the
* same limitiation here as well.
*/
if (num_mpdu_ranges > 1)
ath10k_warn(ar,
"Unsupported number of MPDU ranges: %d, ignoring all but the first\n",
num_mpdu_ranges);
if (mpdu_ranges->mpdu_range_status !=
HTT_RX_IND_MPDU_STATUS_OK &&
mpdu_ranges->mpdu_range_status !=
HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR) {
ath10k_dbg(ar, ATH10K_DBG_HTT, "htt mpdu_range_status %d\n",
mpdu_ranges->mpdu_range_status);
goto err;
}
rx_desc = (struct htt_hl_rx_desc *)&rx->mpdu_ranges[num_mpdu_ranges];
rx_desc_info = __le32_to_cpu(rx_desc->info);
if (MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST))
sec_index = HTT_TXRX_SEC_MCAST;
else
sec_index = HTT_TXRX_SEC_UCAST;
sec_type = peer->rx_pn[sec_index].sec_type;
first_msdu = rx->fw_desc.flags & FW_RX_DESC_FLAGS_FIRST_MSDU;
ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
if (check_pn_type == HTT_RX_PN_CHECK && tid >= IEEE80211_NUM_TIDS) {
spin_lock_bh(&ar->data_lock);
pn_invalid = ath10k_htt_rx_pn_check_replay_hl(ar, peer, rx);
spin_unlock_bh(&ar->data_lock);
if (pn_invalid)
goto err;
}
/* Strip off all headers before the MAC header before delivery to
* mac80211
*/
tot_hdr_len = sizeof(struct htt_resp_hdr) + sizeof(rx->hdr) +
sizeof(rx->ppdu) + sizeof(rx->prefix) +
sizeof(rx->fw_desc) +
sizeof(*mpdu_ranges) * num_mpdu_ranges + rx_desc_len;
skb_pull(skb, tot_hdr_len);
hdr = (struct ieee80211_hdr *)skb->data;
qos = ieee80211_is_data_qos(hdr->frame_control);
rx_status = IEEE80211_SKB_RXCB(skb);
memset(rx_status, 0, sizeof(*rx_status));
if (rx->ppdu.combined_rssi == 0) {
/* SDIO firmware does not provide signal */
rx_status->signal = 0;
rx_status->flag |= RX_FLAG_NO_SIGNAL_VAL;
} else {
rx_status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
rx->ppdu.combined_rssi;
rx_status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
}
spin_lock_bh(&ar->data_lock);
ch = ar->scan_channel;
if (!ch)
ch = ar->rx_channel;
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) {
rx_status->band = ch->band;
rx_status->freq = ch->center_freq;
}
if (rx->fw_desc.flags & FW_RX_DESC_FLAGS_LAST_MSDU)
rx_status->flag &= ~RX_FLAG_AMSDU_MORE;
else
rx_status->flag |= RX_FLAG_AMSDU_MORE;
/* Not entirely sure about this, but all frames from the chipset has
* the protected flag set even though they have already been decrypted.
* Unmasking this flag is necessary in order for mac80211 not to drop
* the frame.
* TODO: Verify this is always the case or find out a way to check
* if there has been hw decryption.
*/
if (ieee80211_has_protected(hdr->frame_control)) {
hdr->frame_control &= ~__cpu_to_le16(IEEE80211_FCTL_PROTECTED);
rx_status->flag |= RX_FLAG_DECRYPTED |
RX_FLAG_IV_STRIPPED |
RX_FLAG_MMIC_STRIPPED;
if (tid < IEEE80211_NUM_TIDS &&
first_msdu &&
check_pn_type == HTT_RX_PN_CHECK &&
(sec_type == HTT_SECURITY_AES_CCMP ||
sec_type == HTT_SECURITY_TKIP ||
sec_type == HTT_SECURITY_TKIP_NOMIC)) {
u8 offset, *ivp, i;
s8 keyidx = 0;
__le64 pn48 = cpu_to_le64(new_pn.pn48);
hdr = (struct ieee80211_hdr *)skb->data;
offset = ieee80211_hdrlen(hdr->frame_control);
hdr->frame_control |= __cpu_to_le16(IEEE80211_FCTL_PROTECTED);
rx_status->flag &= ~RX_FLAG_IV_STRIPPED;
memmove(skb->data - IEEE80211_CCMP_HDR_LEN,
skb->data, offset);
skb_push(skb, IEEE80211_CCMP_HDR_LEN);
ivp = skb->data + offset;
memset(skb->data + offset, 0, IEEE80211_CCMP_HDR_LEN);
/* Ext IV */
ivp[IEEE80211_WEP_IV_LEN - 1] |= ATH10K_IEEE80211_EXTIV;
for (i = 0; i < ARRAY_SIZE(peer->keys); i++) {
if (peer->keys[i] &&
peer->keys[i]->flags & IEEE80211_KEY_FLAG_PAIRWISE)
keyidx = peer->keys[i]->keyidx;
}
/* Key ID */
ivp[IEEE80211_WEP_IV_LEN - 1] |= keyidx << 6;
if (sec_type == HTT_SECURITY_AES_CCMP) {
rx_status->flag |= RX_FLAG_MIC_STRIPPED;
/* pn 0, pn 1 */
memcpy(skb->data + offset, &pn48, 2);
/* pn 1, pn 3 , pn 34 , pn 5 */
memcpy(skb->data + offset + 4, ((u8 *)&pn48) + 2, 4);
} else {
rx_status->flag |= RX_FLAG_ICV_STRIPPED;
/* TSC 0 */
memcpy(skb->data + offset + 2, &pn48, 1);
/* TSC 1 */
memcpy(skb->data + offset, ((u8 *)&pn48) + 1, 1);
/* TSC 2 , TSC 3 , TSC 4 , TSC 5*/
memcpy(skb->data + offset + 4, ((u8 *)&pn48) + 2, 4);
}
}
}
if (tkip_mic_type == HTT_RX_TKIP_MIC)
rx_status->flag &= ~RX_FLAG_IV_STRIPPED &
~RX_FLAG_MMIC_STRIPPED;
if (mpdu_ranges->mpdu_range_status == HTT_RX_IND_MPDU_STATUS_TKIP_MIC_ERR)
rx_status->flag |= RX_FLAG_MMIC_ERROR;
if (!qos && tid < IEEE80211_NUM_TIDS) {
u8 offset;
__le16 qos_ctrl = 0;
hdr = (struct ieee80211_hdr *)skb->data;
offset = ieee80211_hdrlen(hdr->frame_control);
hdr->frame_control |= cpu_to_le16(IEEE80211_STYPE_QOS_DATA);
memmove(skb->data - IEEE80211_QOS_CTL_LEN, skb->data, offset);
skb_push(skb, IEEE80211_QOS_CTL_LEN);
qos_ctrl = cpu_to_le16(tid);
memcpy(skb->data + offset, &qos_ctrl, IEEE80211_QOS_CTL_LEN);
}
if (ar->napi.dev)
ieee80211_rx_napi(ar->hw, NULL, skb, &ar->napi);
else
ieee80211_rx_ni(ar->hw, skb);
/* We have delivered the skb to the upper layers (mac80211) so we
* must not free it.
*/
return false;
err:
/* Tell the caller that it must free the skb since we have not
* consumed it
*/
return true;
}
static int ath10k_htt_rx_frag_tkip_decap_nomic(struct sk_buff *skb,
u16 head_len,
u16 hdr_len)
{
u8 *ivp, *orig_hdr;
orig_hdr = skb->data;
ivp = orig_hdr + hdr_len + head_len;
/* the ExtIV bit is always set to 1 for TKIP */
if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
return -EINVAL;
memmove(orig_hdr + IEEE80211_TKIP_IV_LEN, orig_hdr, head_len + hdr_len);
skb_pull(skb, IEEE80211_TKIP_IV_LEN);
skb_trim(skb, skb->len - ATH10K_IEEE80211_TKIP_MICLEN);
return 0;
}
static int ath10k_htt_rx_frag_tkip_decap_withmic(struct sk_buff *skb,
u16 head_len,
u16 hdr_len)
{
u8 *ivp, *orig_hdr;
orig_hdr = skb->data;
ivp = orig_hdr + hdr_len + head_len;
/* the ExtIV bit is always set to 1 for TKIP */
if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
return -EINVAL;
memmove(orig_hdr + IEEE80211_TKIP_IV_LEN, orig_hdr, head_len + hdr_len);
skb_pull(skb, IEEE80211_TKIP_IV_LEN);
skb_trim(skb, skb->len - IEEE80211_TKIP_ICV_LEN);
return 0;
}
static int ath10k_htt_rx_frag_ccmp_decap(struct sk_buff *skb,
u16 head_len,
u16 hdr_len)
{
u8 *ivp, *orig_hdr;
orig_hdr = skb->data;
ivp = orig_hdr + hdr_len + head_len;
/* the ExtIV bit is always set to 1 for CCMP */
if (!(ivp[IEEE80211_WEP_IV_LEN - 1] & ATH10K_IEEE80211_EXTIV))
return -EINVAL;
skb_trim(skb, skb->len - IEEE80211_CCMP_MIC_LEN);
memmove(orig_hdr + IEEE80211_CCMP_HDR_LEN, orig_hdr, head_len + hdr_len);
skb_pull(skb, IEEE80211_CCMP_HDR_LEN);
return 0;
}
static int ath10k_htt_rx_frag_wep_decap(struct sk_buff *skb,
u16 head_len,
u16 hdr_len)
{
u8 *orig_hdr;
orig_hdr = skb->data;
memmove(orig_hdr + IEEE80211_WEP_IV_LEN,
orig_hdr, head_len + hdr_len);
skb_pull(skb, IEEE80211_WEP_IV_LEN);
skb_trim(skb, skb->len - IEEE80211_WEP_ICV_LEN);
return 0;
}
static bool ath10k_htt_rx_proc_rx_frag_ind_hl(struct ath10k_htt *htt,
struct htt_rx_fragment_indication *rx,
struct sk_buff *skb)
{
struct ath10k *ar = htt->ar;
enum htt_rx_tkip_demic_type tkip_mic = HTT_RX_NON_TKIP_MIC;
enum htt_txrx_sec_cast_type sec_index;
struct htt_rx_indication_hl *rx_hl;
enum htt_security_types sec_type;
u32 tid, frag, seq, rx_desc_info;
union htt_rx_pn_t new_pn = {0};
struct htt_hl_rx_desc *rx_desc;
u16 peer_id, sc, hdr_space;
union htt_rx_pn_t *last_pn;
struct ieee80211_hdr *hdr;
int ret, num_mpdu_ranges;
struct ath10k_peer *peer;
struct htt_resp *resp;
size_t tot_hdr_len;
resp = (struct htt_resp *)(skb->data + HTT_RX_FRAG_IND_INFO0_HEADER_LEN);
skb_pull(skb, HTT_RX_FRAG_IND_INFO0_HEADER_LEN);
skb_trim(skb, skb->len - FCS_LEN);
peer_id = __le16_to_cpu(rx->peer_id);
rx_hl = (struct htt_rx_indication_hl *)(&resp->rx_ind_hl);
spin_lock_bh(&ar->data_lock);
peer = ath10k_peer_find_by_id(ar, peer_id);
if (!peer) {
ath10k_dbg(ar, ATH10K_DBG_HTT, "invalid peer: %u\n", peer_id);
goto err;
}
num_mpdu_ranges = MS(__le32_to_cpu(rx_hl->hdr.info1),
HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
tot_hdr_len = sizeof(struct htt_resp_hdr) +
sizeof(rx_hl->hdr) +
sizeof(rx_hl->ppdu) +
sizeof(rx_hl->prefix) +
sizeof(rx_hl->fw_desc) +
sizeof(struct htt_rx_indication_mpdu_range) * num_mpdu_ranges;
tid = MS(rx_hl->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
rx_desc = (struct htt_hl_rx_desc *)(skb->data + tot_hdr_len);
rx_desc_info = __le32_to_cpu(rx_desc->info);
hdr = (struct ieee80211_hdr *)((u8 *)rx_desc + rx_hl->fw_desc.len);
if (is_multicast_ether_addr(hdr->addr1)) {
/* Discard the fragment with multicast DA */
goto err;
}
if (!MS(rx_desc_info, HTT_RX_DESC_HL_INFO_ENCRYPTED)) {
spin_unlock_bh(&ar->data_lock);
return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
HTT_RX_NON_PN_CHECK,
HTT_RX_NON_TKIP_MIC);
}
if (ieee80211_has_retry(hdr->frame_control))
goto err;
hdr_space = ieee80211_hdrlen(hdr->frame_control);
sc = __le16_to_cpu(hdr->seq_ctrl);
seq = (sc & IEEE80211_SCTL_SEQ) >> 4;
frag = sc & IEEE80211_SCTL_FRAG;
sec_index = MS(rx_desc_info, HTT_RX_DESC_HL_INFO_MCAST_BCAST) ?
HTT_TXRX_SEC_MCAST : HTT_TXRX_SEC_UCAST;
sec_type = peer->rx_pn[sec_index].sec_type;
ath10k_htt_rx_mpdu_desc_pn_hl(rx_desc, &new_pn, peer->rx_pn[sec_index].pn_len);
switch (sec_type) {
case HTT_SECURITY_TKIP:
tkip_mic = HTT_RX_TKIP_MIC;
ret = ath10k_htt_rx_frag_tkip_decap_withmic(skb,
tot_hdr_len +
rx_hl->fw_desc.len,
hdr_space);
if (ret)
goto err;
break;
case HTT_SECURITY_TKIP_NOMIC:
ret = ath10k_htt_rx_frag_tkip_decap_nomic(skb,
tot_hdr_len +
rx_hl->fw_desc.len,
hdr_space);
if (ret)
goto err;
break;
case HTT_SECURITY_AES_CCMP:
ret = ath10k_htt_rx_frag_ccmp_decap(skb,
tot_hdr_len + rx_hl->fw_desc.len,
hdr_space);
if (ret)
goto err;
break;
case HTT_SECURITY_WEP128:
case HTT_SECURITY_WEP104:
case HTT_SECURITY_WEP40:
ret = ath10k_htt_rx_frag_wep_decap(skb,
tot_hdr_len + rx_hl->fw_desc.len,
hdr_space);
if (ret)
goto err;
break;
default:
break;
}
resp = (struct htt_resp *)(skb->data);
if (sec_type != HTT_SECURITY_AES_CCMP &&
sec_type != HTT_SECURITY_TKIP &&
sec_type != HTT_SECURITY_TKIP_NOMIC) {
spin_unlock_bh(&ar->data_lock);
return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
HTT_RX_NON_PN_CHECK,
HTT_RX_NON_TKIP_MIC);
}
last_pn = &peer->frag_tids_last_pn[tid];
if (frag == 0) {
if (ath10k_htt_rx_pn_check_replay_hl(ar, peer, &resp->rx_ind_hl))
goto err;
last_pn->pn48 = new_pn.pn48;
peer->frag_tids_seq[tid] = seq;
} else if (sec_type == HTT_SECURITY_AES_CCMP) {
if (seq != peer->frag_tids_seq[tid])
goto err;
if (new_pn.pn48 != last_pn->pn48 + 1)
goto err;
last_pn->pn48 = new_pn.pn48;
last_pn = &peer->tids_last_pn[tid];
last_pn->pn48 = new_pn.pn48;
}
spin_unlock_bh(&ar->data_lock);
return ath10k_htt_rx_proc_rx_ind_hl(htt, &resp->rx_ind_hl, skb,
HTT_RX_NON_PN_CHECK, tkip_mic);
err:
spin_unlock_bh(&ar->data_lock);
/* Tell the caller that it must free the skb since we have not
* consumed it
*/
return true;
}
static void ath10k_htt_rx_proc_rx_ind_ll(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;
u16 peer_id;
u8 tid;
num_mpdu_ranges = MS(__le32_to_cpu(rx->hdr.info1),
HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
peer_id = __le16_to_cpu(rx->hdr.peer_id);
tid = MS(rx->hdr.info0, HTT_RX_INDICATION_INFO0_EXT_TID);
mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
rx, struct_size(rx, mpdu_ranges, 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);
ath10k_sta_update_rx_tid_stats_ampdu(ar, peer_id, tid, mpdu_ranges,
num_mpdu_ranges);
}
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, *msdus;
bool rssi_enabled = false;
u8 msdu_count = 0, num_airtime_records, tid;
int i, htt_pad = 0;
struct htt_data_tx_compl_ppdu_dur *ppdu_info;
struct ath10k_peer *peer;
u16 ppdu_info_offset = 0, peer_id;
u32 tx_duration;
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);
msdu_count = resp->data_tx_completion.num_msdus;
msdus = resp->data_tx_completion.msdus;
rssi_enabled = ath10k_is_rssi_enable(&ar->hw_params, resp);
if (rssi_enabled)
htt_pad = ath10k_tx_data_rssi_get_pad_bytes(&ar->hw_params,
resp);
for (i = 0; i < msdu_count; i++) {
msdu_id = msdus[i];
tx_done.msdu_id = __le16_to_cpu(msdu_id);
if (rssi_enabled) {
/* Total no of MSDUs should be even,
* if odd MSDUs are sent firmware fills
* last msdu id with 0xffff
*/
if (msdu_count & 0x01) {
msdu_id = msdus[msdu_count + i + 1 + htt_pad];
tx_done.ack_rssi = __le16_to_cpu(msdu_id);
} else {
msdu_id = msdus[msdu_count + i + htt_pad];
tx_done.ack_rssi = __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 (ar->bus_param.dev_type == ATH10K_DEV_TYPE_HL) {
ath10k_txrx_tx_unref(htt, &tx_done);
} else 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);
}
}
if (!(resp->data_tx_completion.flags2 & HTT_TX_CMPL_FLAG_PPDU_DURATION_PRESENT))
return;
ppdu_info_offset = (msdu_count & 0x01) ? msdu_count + 1 : msdu_count;
if (rssi_enabled)
ppdu_info_offset += ppdu_info_offset;
if (resp->data_tx_completion.flags2 &
(HTT_TX_CMPL_FLAG_PPID_PRESENT | HTT_TX_CMPL_FLAG_PA_PRESENT))
ppdu_info_offset += 2;
ppdu_info = (struct htt_data_tx_compl_ppdu_dur *)&msdus[ppdu_info_offset];
num_airtime_records = FIELD_GET(HTT_TX_COMPL_PPDU_DUR_INFO0_NUM_ENTRIES_MASK,
__le32_to_cpu(ppdu_info->info0));
for (i = 0; i < num_airtime_records; i++) {
struct htt_data_tx_ppdu_dur *ppdu_dur;
u32 info0;
ppdu_dur = &ppdu_info->ppdu_dur[i];
info0 = __le32_to_cpu(ppdu_dur->info0);
peer_id = FIELD_GET(HTT_TX_PPDU_DUR_INFO0_PEER_ID_MASK,
info0);
rcu_read_lock();
spin_lock_bh(&ar->data_lock);
peer = ath10k_peer_find_by_id(ar, peer_id);
if (!peer || !peer->sta) {
spin_unlock_bh(&ar->data_lock);
rcu_read_unlock();
continue;
}
tid = FIELD_GET(HTT_TX_PPDU_DUR_INFO0_TID_MASK, info0) &
IEEE80211_QOS_CTL_TID_MASK;
tx_duration = __le32_to_cpu(ppdu_dur->tx_duration);
ieee80211_sta_register_airtime(peer->sta, tid, tx_duration, 0);
spin_unlock_bh(&ar->data_lock);
rcu_read_unlock();
}
}
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 %u peer_id %u size %u\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: %u\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 %u size %u\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 %u peer_id %u\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: %u\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 %u\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.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;