[PATCH 6/7] ath10k: use rx descriptor for ppdu status extraction
Michal Kazior
michal.kazior at tieto.com
Tue Nov 4 06:22:10 PST 2014
This makes it more in line with the new Rx path.
It also makes the code more reusable because Rx
descriptor is more accessible.
Signed-off-by: Michal Kazior <michal.kazior at tieto.com>
---
drivers/net/wireless/ath/ath10k/htt_rx.c | 137 ++++++++++++++++++++++---------
1 file changed, 96 insertions(+), 41 deletions(-)
diff --git a/drivers/net/wireless/ath/ath10k/htt_rx.c b/drivers/net/wireless/ath/ath10k/htt_rx.c
index 55e4568..9073a0e 100644
--- a/drivers/net/wireless/ath/ath10k/htt_rx.c
+++ b/drivers/net/wireless/ath/ath10k/htt_rx.c
@@ -631,23 +631,34 @@ static const u8 rx_legacy_rate_idx[] = {
};
static void ath10k_htt_rx_h_rates(struct ath10k *ar,
- enum ieee80211_band band,
- u8 info0, u32 info1, u32 info2,
- struct ieee80211_rx_status *status)
+ struct ieee80211_rx_status *status,
+ struct htt_rx_desc *rxd)
{
+ enum ieee80211_band band;
u8 cck, rate, rate_idx, bw, sgi, mcs, nss;
u8 preamble = 0;
+ u32 info1, info2, info3;
- /* Check if valid fields */
- if (!(info0 & HTT_RX_INDICATION_INFO0_START_VALID))
+ /* Band value can't be set as undefined but freq can be 0 - use that to
+ * determine whether band is provided.
+ *
+ * FIXME: Perhaps this can go away if CCK rate reporting is a little
+ * reworked?
+ */
+ if (!status->freq)
return;
- preamble = MS(info1, HTT_RX_INDICATION_INFO1_PREAMBLE_TYPE);
+ band = status->band;
+ info1 = __le32_to_cpu(rxd->ppdu_start.info1);
+ info2 = __le32_to_cpu(rxd->ppdu_start.info2);
+ info3 = __le32_to_cpu(rxd->ppdu_start.info3);
+
+ preamble = MS(info1, RX_PPDU_START_INFO1_PREAMBLE_TYPE);
switch (preamble) {
case HTT_RX_LEGACY:
- cck = info0 & HTT_RX_INDICATION_INFO0_LEGACY_RATE_CCK;
- rate = MS(info0, HTT_RX_INDICATION_INFO0_LEGACY_RATE);
+ cck = info1 & RX_PPDU_START_INFO1_L_SIG_RATE_SELECT;
+ rate = MS(info1, RX_PPDU_START_INFO1_L_SIG_RATE);
rate_idx = 0;
if (rate < 0x08 || rate > 0x0F)
@@ -674,11 +685,11 @@ static void ath10k_htt_rx_h_rates(struct ath10k *ar,
break;
case HTT_RX_HT:
case HTT_RX_HT_WITH_TXBF:
- /* HT-SIG - Table 20-11 in info1 and info2 */
- mcs = info1 & 0x1F;
+ /* HT-SIG - Table 20-11 in info2 and info3 */
+ mcs = info2 & 0x1F;
nss = mcs >> 3;
- bw = (info1 >> 7) & 1;
- sgi = (info2 >> 7) & 1;
+ bw = (info2 >> 7) & 1;
+ sgi = (info3 >> 7) & 1;
status->rate_idx = mcs;
status->flag |= RX_FLAG_HT;
@@ -689,12 +700,12 @@ static void ath10k_htt_rx_h_rates(struct ath10k *ar,
break;
case HTT_RX_VHT:
case HTT_RX_VHT_WITH_TXBF:
- /* VHT-SIG-A1 in info 1, VHT-SIG-A2 in info2
+ /* VHT-SIG-A1 in info2, VHT-SIG-A2 in info3
TODO check this */
- mcs = (info2 >> 4) & 0x0F;
- nss = ((info1 >> 10) & 0x07) + 1;
- bw = info1 & 3;
- sgi = info2 & 1;
+ mcs = (info3 >> 4) & 0x0F;
+ nss = ((info2 >> 10) & 0x07) + 1;
+ bw = info2 & 3;
+ sgi = info3 & 1;
status->rate_idx = mcs;
status->vht_nss = nss;
@@ -742,6 +753,73 @@ static bool ath10k_htt_rx_h_channel(struct ath10k *ar,
return true;
}
+static void ath10k_htt_rx_h_signal(struct ath10k *ar,
+ struct ieee80211_rx_status *status,
+ struct htt_rx_desc *rxd)
+{
+ /* FIXME: Get real NF */
+ status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
+ rxd->ppdu_start.rssi_comb;
+ status->flag &= ~RX_FLAG_NO_SIGNAL_VAL;
+}
+
+static void ath10k_htt_rx_h_mactime(struct ath10k *ar,
+ struct ieee80211_rx_status *status,
+ struct htt_rx_desc *rxd)
+{
+ /* FIXME: TSF is known only at the end of PPDU, in the last MPDU. This
+ * means all prior MSDUs in a PPDU are reported to mac80211 without the
+ * TSF. Is it worth holding frames until end of PPDU is known?
+ *
+ * FIXME: Can we get/compute 64bit TSF?
+ */
+ status->mactime = __le32_to_cpu(rxd->ppdu_end.tsf_timestamp);
+ status->flag |= RX_FLAG_MACTIME_END;
+}
+
+static void ath10k_htt_rx_h_ppdu(struct ath10k *ar,
+ struct sk_buff_head *amsdu,
+ struct ieee80211_rx_status *status)
+{
+ struct sk_buff *first;
+ struct htt_rx_desc *rxd;
+ bool is_first_ppdu;
+ bool is_last_ppdu;
+
+ if (skb_queue_empty(amsdu))
+ return;
+
+ first = skb_peek(amsdu);
+ rxd = (void *)first->data - sizeof(*rxd);
+
+ is_first_ppdu = !!(rxd->attention.flags &
+ __cpu_to_le32(RX_ATTENTION_FLAGS_FIRST_MPDU));
+ is_last_ppdu = !!(rxd->attention.flags &
+ __cpu_to_le32(RX_ATTENTION_FLAGS_LAST_MPDU));
+
+ if (is_first_ppdu) {
+ /* New PPDU starts so clear out the old per-PPDU status. */
+ status->freq = 0;
+ status->rate_idx = 0;
+ status->vht_nss = 0;
+ status->vht_flag &= ~RX_VHT_FLAG_80MHZ;
+ status->flag &= ~(RX_FLAG_HT |
+ RX_FLAG_VHT |
+ RX_FLAG_SHORT_GI |
+ RX_FLAG_40MHZ |
+ RX_FLAG_MACTIME_END);
+ status->flag |= RX_FLAG_NO_SIGNAL_VAL;
+
+ ath10k_htt_rx_h_signal(ar, status, rxd);
+ ath10k_htt_rx_h_channel(ar, status);
+ ath10k_htt_rx_h_rates(ar, status, rxd);
+ }
+
+ if (is_last_ppdu) {
+ ath10k_htt_rx_h_mactime(ar, status, rxd);
+ }
+}
+
static const char * const tid_to_ac[] = {
"BE",
"BK",
@@ -1358,7 +1436,6 @@ static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
int num_mpdu_ranges;
int fw_desc_len;
u8 *fw_desc;
- bool channel_set;
int i, ret, mpdu_count = 0;
lockdep_assert_held(&htt->rx_ring.lock);
@@ -1373,29 +1450,6 @@ static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
HTT_RX_INDICATION_INFO1_NUM_MPDU_RANGES);
mpdu_ranges = htt_rx_ind_get_mpdu_ranges(rx);
- /* Fill this once, while this is per-ppdu */
- if (rx->ppdu.info0 & HTT_RX_INDICATION_INFO0_START_VALID) {
- memset(rx_status, 0, sizeof(*rx_status));
- rx_status->signal = ATH10K_DEFAULT_NOISE_FLOOR +
- rx->ppdu.combined_rssi;
- }
-
- if (rx->ppdu.info0 & HTT_RX_INDICATION_INFO0_END_VALID) {
- /* TSF available only in 32-bit */
- rx_status->mactime = __le32_to_cpu(rx->ppdu.tsf) & 0xffffffff;
- rx_status->flag |= RX_FLAG_MACTIME_END;
- }
-
- channel_set = ath10k_htt_rx_h_channel(htt->ar, rx_status);
-
- if (channel_set) {
- ath10k_htt_rx_h_rates(htt->ar, rx_status->band,
- rx->ppdu.info0,
- __le32_to_cpu(rx->ppdu.info1),
- __le32_to_cpu(rx->ppdu.info2),
- rx_status);
- }
-
ath10k_dbg_dump(ar, ATH10K_DBG_HTT_DUMP, NULL, "htt rx ind: ",
rx, sizeof(*rx) +
(sizeof(struct htt_rx_indication_mpdu_range) *
@@ -1418,6 +1472,7 @@ static void ath10k_htt_rx_handler(struct ath10k_htt *htt,
break;
}
+ ath10k_htt_rx_h_ppdu(ar, &amsdu, rx_status);
ath10k_htt_rx_h_unchain(ar, &amsdu, ret > 0);
ath10k_htt_rx_h_filter(ar, &amsdu, rx_status);
ath10k_htt_rx_h_mpdu(ar, &amsdu, rx_status);
--
1.8.5.3
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