/
mac.c
1764 lines (1409 loc) · 43.3 KB
/
mac.c
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/* SPDX-License-Identifier: ISC */
/*
* Copyright (C) 2016 Felix Fietkau <nbd@nbd.name>
*
* 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 <linux/etherdevice.h>
#include <linux/timekeeping.h>
#include "mt7603.h"
#include "mac.h"
#define MT_PSE_PAGE_SIZE 128
static u32
mt7603_ac_queue_mask0(u32 mask)
{
u32 ret = 0;
ret |= GENMASK(3, 0) * !!(mask & BIT(0));
ret |= GENMASK(8, 5) * !!(mask & BIT(1));
ret |= GENMASK(13, 10) * !!(mask & BIT(2));
ret |= GENMASK(19, 16) * !!(mask & BIT(3));
return ret;
}
static void
mt76_stop_tx_ac(struct mt7603_dev *dev, u32 mask)
{
mt76_set(dev, MT_WF_ARB_TX_STOP_0, mt7603_ac_queue_mask0(mask));
}
static void
mt76_start_tx_ac(struct mt7603_dev *dev, u32 mask)
{
mt76_set(dev, MT_WF_ARB_TX_START_0, mt7603_ac_queue_mask0(mask));
}
void mt7603_mac_set_timing(struct mt7603_dev *dev)
{
u32 cck = FIELD_PREP(MT_TIMEOUT_VAL_PLCP, 231) |
FIELD_PREP(MT_TIMEOUT_VAL_CCA, 48);
u32 ofdm = FIELD_PREP(MT_TIMEOUT_VAL_PLCP, 60) |
FIELD_PREP(MT_TIMEOUT_VAL_CCA, 24);
int offset = 3 * dev->coverage_class;
u32 reg_offset = FIELD_PREP(MT_TIMEOUT_VAL_PLCP, offset) |
FIELD_PREP(MT_TIMEOUT_VAL_CCA, offset);
int sifs;
u32 val;
if (dev->mt76.chandef.chan->band == NL80211_BAND_5GHZ)
sifs = 16;
else
sifs = 10;
mt76_set(dev, MT_ARB_SCR,
MT_ARB_SCR_TX_DISABLE | MT_ARB_SCR_RX_DISABLE);
udelay(1);
mt76_wr(dev, MT_TIMEOUT_CCK, cck + reg_offset);
mt76_wr(dev, MT_TIMEOUT_OFDM, ofdm + reg_offset);
mt76_wr(dev, MT_IFS,
FIELD_PREP(MT_IFS_EIFS, 360) |
FIELD_PREP(MT_IFS_RIFS, 2) |
FIELD_PREP(MT_IFS_SIFS, sifs) |
FIELD_PREP(MT_IFS_SLOT, dev->slottime));
if (dev->slottime < 20)
val = MT7603_CFEND_RATE_DEFAULT;
else
val = MT7603_CFEND_RATE_11B;
mt76_rmw_field(dev, MT_AGG_CONTROL, MT_AGG_CONTROL_CFEND_RATE, val);
mt76_clear(dev, MT_ARB_SCR,
MT_ARB_SCR_TX_DISABLE | MT_ARB_SCR_RX_DISABLE);
}
static void
mt7603_wtbl_update(struct mt7603_dev *dev, int idx, u32 mask)
{
mt76_rmw(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_WLAN_IDX,
FIELD_PREP(MT_WTBL_UPDATE_WLAN_IDX, idx) | mask);
mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY, 0, 5000);
}
static u32
mt7603_wtbl1_addr(int idx)
{
return MT_WTBL1_BASE + idx * MT_WTBL1_SIZE;
}
static u32
mt7603_wtbl2_addr(int idx)
{
/* Mapped to WTBL2 */
return MT_PCIE_REMAP_BASE_1 + idx * MT_WTBL2_SIZE;
}
static u32
mt7603_wtbl3_addr(int idx)
{
u32 base = mt7603_wtbl2_addr(MT7603_WTBL_SIZE);
return base + idx * MT_WTBL3_SIZE;
}
static u32
mt7603_wtbl4_addr(int idx)
{
u32 base = mt7603_wtbl3_addr(MT7603_WTBL_SIZE);
return base + idx * MT_WTBL4_SIZE;
}
void mt7603_wtbl_init(struct mt7603_dev *dev, int idx, int vif,
const u8 *mac_addr)
{
const void *_mac = mac_addr;
u32 addr = mt7603_wtbl1_addr(idx);
u32 w0 = 0, w1 = 0;
int i;
if (_mac) {
w0 = FIELD_PREP(MT_WTBL1_W0_ADDR_HI,
get_unaligned_le16(_mac + 4));
w1 = FIELD_PREP(MT_WTBL1_W1_ADDR_LO,
get_unaligned_le32(_mac));
}
if (vif < 0)
vif = 0;
else
w0 |= MT_WTBL1_W0_RX_CHECK_A1;
w0 |= FIELD_PREP(MT_WTBL1_W0_MUAR_IDX, vif);
mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY, 0, 5000);
mt76_set(dev, addr + 0 * 4, w0);
mt76_set(dev, addr + 1 * 4, w1);
mt76_set(dev, addr + 2 * 4, MT_WTBL1_W2_ADMISSION_CONTROL);
mt76_stop_tx_ac(dev, GENMASK(3, 0));
addr = mt7603_wtbl2_addr(idx);
for (i = 0; i < MT_WTBL2_SIZE; i += 4)
mt76_wr(dev, addr + i, 0);
mt7603_wtbl_update(dev, idx, MT_WTBL_UPDATE_WTBL2);
mt76_start_tx_ac(dev, GENMASK(3, 0));
addr = mt7603_wtbl3_addr(idx);
for (i = 0; i < MT_WTBL3_SIZE; i += 4)
mt76_wr(dev, addr + i, 0);
addr = mt7603_wtbl4_addr(idx);
for (i = 0; i < MT_WTBL4_SIZE; i += 4)
mt76_wr(dev, addr + i, 0);
}
static void
mt7603_wtbl_set_skip_tx(struct mt7603_dev *dev, int idx, bool enabled)
{
u32 addr = mt7603_wtbl1_addr(idx);
u32 val = mt76_rr(dev, addr + 3 * 4);
val &= ~MT_WTBL1_W3_SKIP_TX;
val |= enabled * MT_WTBL1_W3_SKIP_TX;
mt76_wr(dev, addr + 3 * 4, val);
}
void mt7603_filter_tx(struct mt7603_dev *dev, int idx, bool abort)
{
int i, port, queue;
if (abort) {
port = 3; /* PSE */
queue = 8; /* free queue */
} else {
port = 0; /* HIF */
queue = 1; /* MCU queue */
}
mt7603_wtbl_set_skip_tx(dev, idx, true);
mt76_wr(dev, MT_TX_ABORT, MT_TX_ABORT_EN |
FIELD_PREP(MT_TX_ABORT_WCID, idx));
for (i = 0; i < 4; i++) {
mt76_wr(dev, MT_DMA_FQCR0, MT_DMA_FQCR0_BUSY |
FIELD_PREP(MT_DMA_FQCR0_TARGET_WCID, idx) |
FIELD_PREP(MT_DMA_FQCR0_TARGET_QID, i) |
FIELD_PREP(MT_DMA_FQCR0_DEST_PORT_ID, port) |
FIELD_PREP(MT_DMA_FQCR0_DEST_QUEUE_ID, queue));
WARN_ON_ONCE(!mt76_poll(dev, MT_DMA_FQCR0, MT_DMA_FQCR0_BUSY,
0, 5000));
}
mt76_wr(dev, MT_TX_ABORT, 0);
mt7603_wtbl_set_skip_tx(dev, idx, false);
}
void mt7603_wtbl_set_smps(struct mt7603_dev *dev, struct mt7603_sta *sta,
bool enabled)
{
u32 addr = mt7603_wtbl1_addr(sta->wcid.idx);
if (sta->smps == enabled)
return;
mt76_rmw_field(dev, addr + 2 * 4, MT_WTBL1_W2_SMPS, enabled);
sta->smps = enabled;
}
void mt7603_wtbl_set_ps(struct mt7603_dev *dev, struct mt7603_sta *sta,
bool enabled)
{
int idx = sta->wcid.idx;
u32 addr;
spin_lock_bh(&dev->ps_lock);
if (sta->ps == enabled)
goto out;
mt76_wr(dev, MT_PSE_RTA,
FIELD_PREP(MT_PSE_RTA_TAG_ID, idx) |
FIELD_PREP(MT_PSE_RTA_PORT_ID, 0) |
FIELD_PREP(MT_PSE_RTA_QUEUE_ID, 1) |
FIELD_PREP(MT_PSE_RTA_REDIRECT_EN, enabled) |
MT_PSE_RTA_WRITE | MT_PSE_RTA_BUSY);
mt76_poll(dev, MT_PSE_RTA, MT_PSE_RTA_BUSY, 0, 5000);
if (enabled)
mt7603_filter_tx(dev, idx, false);
addr = mt7603_wtbl1_addr(idx);
mt76_set(dev, MT_WTBL1_OR, MT_WTBL1_OR_PSM_WRITE);
mt76_rmw(dev, addr + 3 * 4, MT_WTBL1_W3_POWER_SAVE,
enabled * MT_WTBL1_W3_POWER_SAVE);
mt76_clear(dev, MT_WTBL1_OR, MT_WTBL1_OR_PSM_WRITE);
sta->ps = enabled;
out:
spin_unlock_bh(&dev->ps_lock);
}
void mt7603_wtbl_clear(struct mt7603_dev *dev, int idx)
{
int wtbl2_frame_size = MT_PSE_PAGE_SIZE / MT_WTBL2_SIZE;
int wtbl2_frame = idx / wtbl2_frame_size;
int wtbl2_entry = idx % wtbl2_frame_size;
int wtbl3_base_frame = MT_WTBL3_OFFSET / MT_PSE_PAGE_SIZE;
int wtbl3_frame_size = MT_PSE_PAGE_SIZE / MT_WTBL3_SIZE;
int wtbl3_frame = wtbl3_base_frame + idx / wtbl3_frame_size;
int wtbl3_entry = (idx % wtbl3_frame_size) * 2;
int wtbl4_base_frame = MT_WTBL4_OFFSET / MT_PSE_PAGE_SIZE;
int wtbl4_frame_size = MT_PSE_PAGE_SIZE / MT_WTBL4_SIZE;
int wtbl4_frame = wtbl4_base_frame + idx / wtbl4_frame_size;
int wtbl4_entry = idx % wtbl4_frame_size;
u32 addr = MT_WTBL1_BASE + idx * MT_WTBL1_SIZE;
int i;
mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY, 0, 5000);
mt76_wr(dev, addr + 0 * 4,
MT_WTBL1_W0_RX_CHECK_A1 |
MT_WTBL1_W0_RX_CHECK_A2 |
MT_WTBL1_W0_RX_VALID);
mt76_wr(dev, addr + 1 * 4, 0);
mt76_wr(dev, addr + 2 * 4, 0);
mt76_set(dev, MT_WTBL1_OR, MT_WTBL1_OR_PSM_WRITE);
mt76_wr(dev, addr + 3 * 4,
FIELD_PREP(MT_WTBL1_W3_WTBL2_FRAME_ID, wtbl2_frame) |
FIELD_PREP(MT_WTBL1_W3_WTBL2_ENTRY_ID, wtbl2_entry) |
FIELD_PREP(MT_WTBL1_W3_WTBL4_FRAME_ID, wtbl4_frame) |
MT_WTBL1_W3_I_PSM | MT_WTBL1_W3_KEEP_I_PSM);
mt76_wr(dev, addr + 4 * 4,
FIELD_PREP(MT_WTBL1_W4_WTBL3_FRAME_ID, wtbl3_frame) |
FIELD_PREP(MT_WTBL1_W4_WTBL3_ENTRY_ID, wtbl3_entry) |
FIELD_PREP(MT_WTBL1_W4_WTBL4_ENTRY_ID, wtbl4_entry));
mt76_clear(dev, MT_WTBL1_OR, MT_WTBL1_OR_PSM_WRITE);
addr = mt7603_wtbl2_addr(idx);
/* Clear BA information */
mt76_wr(dev, addr + (15 * 4), 0);
mt76_stop_tx_ac(dev, GENMASK(3, 0));
for (i = 2; i <= 4; i++)
mt76_wr(dev, addr + (i * 4), 0);
mt7603_wtbl_update(dev, idx, MT_WTBL_UPDATE_WTBL2);
mt76_start_tx_ac(dev, GENMASK(3, 0));
mt7603_wtbl_update(dev, idx, MT_WTBL_UPDATE_RX_COUNT_CLEAR);
mt7603_wtbl_update(dev, idx, MT_WTBL_UPDATE_TX_COUNT_CLEAR);
mt7603_wtbl_update(dev, idx, MT_WTBL_UPDATE_ADM_COUNT_CLEAR);
}
void mt7603_wtbl_update_cap(struct mt7603_dev *dev, struct ieee80211_sta *sta)
{
struct mt7603_sta *msta = (struct mt7603_sta *)sta->drv_priv;
int idx = msta->wcid.idx;
u32 addr;
u32 val;
addr = mt7603_wtbl1_addr(idx);
val = mt76_rr(dev, addr + 2 * 4);
val &= MT_WTBL1_W2_KEY_TYPE | MT_WTBL1_W2_ADMISSION_CONTROL;
val |= FIELD_PREP(MT_WTBL1_W2_AMPDU_FACTOR, sta->ht_cap.ampdu_factor) |
FIELD_PREP(MT_WTBL1_W2_MPDU_DENSITY, sta->ht_cap.ampdu_density) |
MT_WTBL1_W2_TXS_BAF_REPORT;
if (sta->ht_cap.cap)
val |= MT_WTBL1_W2_HT;
if (sta->vht_cap.cap)
val |= MT_WTBL1_W2_VHT;
mt76_wr(dev, addr + 2 * 4, val);
addr = mt7603_wtbl2_addr(idx);
val = mt76_rr(dev, addr + 9 * 4);
val &= ~(MT_WTBL2_W9_SHORT_GI_20 | MT_WTBL2_W9_SHORT_GI_40 |
MT_WTBL2_W9_SHORT_GI_80);
if (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20)
val |= MT_WTBL2_W9_SHORT_GI_20;
if (sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_40)
val |= MT_WTBL2_W9_SHORT_GI_40;
mt76_wr(dev, addr + 9 * 4, val);
}
void mt7603_mac_rx_ba_reset(struct mt7603_dev *dev, void *addr, u8 tid)
{
mt76_wr(dev, MT_BA_CONTROL_0, get_unaligned_le32(addr));
mt76_wr(dev, MT_BA_CONTROL_1,
(get_unaligned_le16(addr + 4) |
FIELD_PREP(MT_BA_CONTROL_1_TID, tid) |
MT_BA_CONTROL_1_RESET));
}
void mt7603_mac_tx_ba_reset(struct mt7603_dev *dev, int wcid, int tid, int ssn,
int ba_size)
{
u32 addr = mt7603_wtbl2_addr(wcid);
u32 tid_mask = FIELD_PREP(MT_WTBL2_W15_BA_EN_TIDS, BIT(tid)) |
(MT_WTBL2_W15_BA_WIN_SIZE <<
(tid * MT_WTBL2_W15_BA_WIN_SIZE_SHIFT));
u32 tid_val;
int i;
if (ba_size < 0) {
/* disable */
mt76_clear(dev, addr + (15 * 4), tid_mask);
return;
}
mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY, 0, 5000);
mt7603_mac_stop(dev);
switch (tid) {
case 0:
mt76_rmw_field(dev, addr + (2 * 4), MT_WTBL2_W2_TID0_SN, ssn);
break;
case 1:
mt76_rmw_field(dev, addr + (2 * 4), MT_WTBL2_W2_TID1_SN, ssn);
break;
case 2:
mt76_rmw_field(dev, addr + (2 * 4), MT_WTBL2_W2_TID2_SN_LO,
ssn);
mt76_rmw_field(dev, addr + (3 * 4), MT_WTBL2_W3_TID2_SN_HI,
ssn >> 8);
break;
case 3:
mt76_rmw_field(dev, addr + (3 * 4), MT_WTBL2_W3_TID3_SN, ssn);
break;
case 4:
mt76_rmw_field(dev, addr + (3 * 4), MT_WTBL2_W3_TID4_SN, ssn);
break;
case 5:
mt76_rmw_field(dev, addr + (3 * 4), MT_WTBL2_W3_TID5_SN_LO,
ssn);
mt76_rmw_field(dev, addr + (4 * 4), MT_WTBL2_W4_TID5_SN_HI,
ssn >> 4);
break;
case 6:
mt76_rmw_field(dev, addr + (4 * 4), MT_WTBL2_W4_TID6_SN, ssn);
break;
case 7:
mt76_rmw_field(dev, addr + (4 * 4), MT_WTBL2_W4_TID7_SN, ssn);
break;
}
mt7603_wtbl_update(dev, wcid, MT_WTBL_UPDATE_WTBL2);
mt7603_mac_start(dev);
for (i = 7; i > 0; i--) {
if (ba_size < MT_AGG_SIZE_LIMIT(i))
break;
}
tid_val = FIELD_PREP(MT_WTBL2_W15_BA_EN_TIDS, BIT(tid)) |
i << (tid * MT_WTBL2_W15_BA_WIN_SIZE_SHIFT);
mt76_rmw(dev, addr + (15 * 4), tid_mask, tid_val);
}
static int
mt7603_get_rate(struct mt7603_dev *dev, struct ieee80211_supported_band *sband,
int idx, bool cck)
{
int offset = 0;
int len = sband->n_bitrates;
int i;
if (cck) {
if (sband == &dev->mt76.sband_5g.sband)
return 0;
idx &= ~BIT(2); /* short preamble */
} else if (sband == &dev->mt76.sband_2g.sband) {
offset = 4;
}
for (i = offset; i < len; i++) {
if ((sband->bitrates[i].hw_value & GENMASK(7, 0)) == idx)
return i;
}
return 0;
}
static struct mt76_wcid *
mt7603_rx_get_wcid(struct mt7603_dev *dev, u8 idx, bool unicast)
{
struct mt7603_sta *sta;
struct mt76_wcid *wcid;
if (idx >= ARRAY_SIZE(dev->mt76.wcid))
return NULL;
wcid = rcu_dereference(dev->mt76.wcid[idx]);
if (unicast || !wcid)
return wcid;
if (!wcid->sta)
return NULL;
sta = container_of(wcid, struct mt7603_sta, wcid);
if (!sta->vif)
return NULL;
return &sta->vif->sta.wcid;
}
static void
mt7603_insert_ccmp_hdr(struct sk_buff *skb, u8 key_id)
{
struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
int hdr_len = ieee80211_get_hdrlen_from_skb(skb);
u8 *pn = status->iv;
u8 *hdr;
__skb_push(skb, 8);
memmove(skb->data, skb->data + 8, hdr_len);
hdr = skb->data + hdr_len;
hdr[0] = pn[5];
hdr[1] = pn[4];
hdr[2] = 0;
hdr[3] = 0x20 | (key_id << 6);
hdr[4] = pn[3];
hdr[5] = pn[2];
hdr[6] = pn[1];
hdr[7] = pn[0];
status->flag &= ~RX_FLAG_IV_STRIPPED;
}
int
mt7603_mac_fill_rx(struct mt7603_dev *dev, struct sk_buff *skb)
{
struct mt76_rx_status *status = (struct mt76_rx_status *)skb->cb;
struct ieee80211_supported_band *sband;
struct ieee80211_hdr *hdr;
__le32 *rxd = (__le32 *)skb->data;
u32 rxd0 = le32_to_cpu(rxd[0]);
u32 rxd1 = le32_to_cpu(rxd[1]);
u32 rxd2 = le32_to_cpu(rxd[2]);
bool unicast = rxd1 & MT_RXD1_NORMAL_U2M;
bool insert_ccmp_hdr = false;
bool remove_pad;
int idx;
int i;
memset(status, 0, sizeof(*status));
i = FIELD_GET(MT_RXD1_NORMAL_CH_FREQ, rxd1);
sband = (i & 1) ? &dev->mt76.sband_5g.sband : &dev->mt76.sband_2g.sband;
i >>= 1;
idx = FIELD_GET(MT_RXD2_NORMAL_WLAN_IDX, rxd2);
status->wcid = mt7603_rx_get_wcid(dev, idx, unicast);
status->band = sband->band;
if (i < sband->n_channels)
status->freq = sband->channels[i].center_freq;
if (rxd2 & MT_RXD2_NORMAL_FCS_ERR)
status->flag |= RX_FLAG_FAILED_FCS_CRC;
if (rxd2 & MT_RXD2_NORMAL_TKIP_MIC_ERR)
status->flag |= RX_FLAG_MMIC_ERROR;
if (FIELD_GET(MT_RXD2_NORMAL_SEC_MODE, rxd2) != 0 &&
!(rxd2 & (MT_RXD2_NORMAL_CLM | MT_RXD2_NORMAL_CM))) {
status->flag |= RX_FLAG_DECRYPTED;
status->flag |= RX_FLAG_IV_STRIPPED;
status->flag |= RX_FLAG_MMIC_STRIPPED | RX_FLAG_MIC_STRIPPED;
}
remove_pad = rxd1 & MT_RXD1_NORMAL_HDR_OFFSET;
if (rxd2 & MT_RXD2_NORMAL_MAX_LEN_ERROR)
return -EINVAL;
if (!sband->channels)
return -EINVAL;
rxd += 4;
if (rxd0 & MT_RXD0_NORMAL_GROUP_4) {
rxd += 4;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
}
if (rxd0 & MT_RXD0_NORMAL_GROUP_1) {
u8 *data = (u8 *)rxd;
if (status->flag & RX_FLAG_DECRYPTED) {
status->iv[0] = data[5];
status->iv[1] = data[4];
status->iv[2] = data[3];
status->iv[3] = data[2];
status->iv[4] = data[1];
status->iv[5] = data[0];
insert_ccmp_hdr = FIELD_GET(MT_RXD2_NORMAL_FRAG, rxd2);
}
rxd += 4;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
}
if (rxd0 & MT_RXD0_NORMAL_GROUP_2) {
rxd += 2;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
}
if (rxd0 & MT_RXD0_NORMAL_GROUP_3) {
u32 rxdg0 = le32_to_cpu(rxd[0]);
u32 rxdg3 = le32_to_cpu(rxd[3]);
bool cck = false;
i = FIELD_GET(MT_RXV1_TX_RATE, rxdg0);
switch (FIELD_GET(MT_RXV1_TX_MODE, rxdg0)) {
case MT_PHY_TYPE_CCK:
cck = true;
/* fall through */
case MT_PHY_TYPE_OFDM:
i = mt7603_get_rate(dev, sband, i, cck);
break;
case MT_PHY_TYPE_HT_GF:
case MT_PHY_TYPE_HT:
status->encoding = RX_ENC_HT;
if (i > 15)
return -EINVAL;
break;
default:
return -EINVAL;
}
if (rxdg0 & MT_RXV1_HT_SHORT_GI)
status->enc_flags |= RX_ENC_FLAG_SHORT_GI;
if (rxdg0 & MT_RXV1_HT_AD_CODE)
status->enc_flags |= RX_ENC_FLAG_LDPC;
status->enc_flags |= RX_ENC_FLAG_STBC_MASK *
FIELD_GET(MT_RXV1_HT_STBC, rxdg0);
status->rate_idx = i;
status->chains = dev->mt76.antenna_mask;
status->chain_signal[0] = FIELD_GET(MT_RXV4_IB_RSSI0, rxdg3) +
dev->rssi_offset[0];
status->chain_signal[1] = FIELD_GET(MT_RXV4_IB_RSSI1, rxdg3) +
dev->rssi_offset[1];
status->signal = status->chain_signal[0];
if (status->chains & BIT(1))
status->signal = max(status->signal,
status->chain_signal[1]);
if (FIELD_GET(MT_RXV1_FRAME_MODE, rxdg0) == 1)
status->bw = RATE_INFO_BW_40;
rxd += 6;
if ((u8 *)rxd - skb->data >= skb->len)
return -EINVAL;
} else {
return -EINVAL;
}
skb_pull(skb, (u8 *)rxd - skb->data + 2 * remove_pad);
if (insert_ccmp_hdr) {
u8 key_id = FIELD_GET(MT_RXD1_NORMAL_KEY_ID, rxd1);
mt7603_insert_ccmp_hdr(skb, key_id);
}
hdr = (struct ieee80211_hdr *)skb->data;
if (!status->wcid || !ieee80211_is_data_qos(hdr->frame_control))
return 0;
status->aggr = unicast &&
!ieee80211_is_qos_nullfunc(hdr->frame_control);
status->tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK;
status->seqno = hdr->seq_ctrl >> 4;
return 0;
}
static u16
mt7603_mac_tx_rate_val(struct mt7603_dev *dev,
const struct ieee80211_tx_rate *rate, bool stbc, u8 *bw)
{
u8 phy, nss, rate_idx;
u16 rateval;
*bw = 0;
if (rate->flags & IEEE80211_TX_RC_MCS) {
rate_idx = rate->idx;
nss = 1 + (rate->idx >> 3);
phy = MT_PHY_TYPE_HT;
if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD)
phy = MT_PHY_TYPE_HT_GF;
if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
*bw = 1;
} else {
const struct ieee80211_rate *r;
int band = dev->mt76.chandef.chan->band;
u16 val;
nss = 1;
r = &mt76_hw(dev)->wiphy->bands[band]->bitrates[rate->idx];
if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
val = r->hw_value_short;
else
val = r->hw_value;
phy = val >> 8;
rate_idx = val & 0xff;
}
rateval = (FIELD_PREP(MT_TX_RATE_IDX, rate_idx) |
FIELD_PREP(MT_TX_RATE_MODE, phy));
if (stbc && nss == 1)
rateval |= MT_TX_RATE_STBC;
return rateval;
}
void mt7603_wtbl_set_rates(struct mt7603_dev *dev, struct mt7603_sta *sta,
struct ieee80211_tx_rate *probe_rate,
struct ieee80211_tx_rate *rates)
{
int wcid = sta->wcid.idx;
u32 addr = mt7603_wtbl2_addr(wcid);
bool stbc = false;
int n_rates = sta->n_rates;
u8 bw, bw_prev, bw_idx = 0;
u16 val[4];
u16 probe_val;
u32 w9 = mt76_rr(dev, addr + 9 * 4);
int i;
if (!mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY, 0, 5000))
return;
for (i = n_rates; i < 4; i++)
rates[i] = rates[n_rates - 1];
w9 &= MT_WTBL2_W9_SHORT_GI_20 | MT_WTBL2_W9_SHORT_GI_40 |
MT_WTBL2_W9_SHORT_GI_80;
val[0] = mt7603_mac_tx_rate_val(dev, &rates[0], stbc, &bw);
bw_prev = bw;
if (probe_rate) {
probe_val = mt7603_mac_tx_rate_val(dev, probe_rate, stbc, &bw);
if (bw)
bw_idx = 1;
else
bw_prev = 0;
} else {
probe_val = val[0];
}
w9 |= FIELD_PREP(MT_WTBL2_W9_CC_BW_SEL, bw);
w9 |= FIELD_PREP(MT_WTBL2_W9_BW_CAP, bw);
val[1] = mt7603_mac_tx_rate_val(dev, &rates[1], stbc, &bw);
if (bw_prev) {
bw_idx = 3;
bw_prev = bw;
}
val[2] = mt7603_mac_tx_rate_val(dev, &rates[2], stbc, &bw);
if (bw_prev) {
bw_idx = 5;
bw_prev = bw;
}
val[3] = mt7603_mac_tx_rate_val(dev, &rates[3], stbc, &bw);
if (bw_prev)
bw_idx = 7;
w9 |= FIELD_PREP(MT_WTBL2_W9_CHANGE_BW_RATE,
bw_idx ? bw_idx - 1 : 7);
mt76_wr(dev, MT_WTBL_RIUCR0, w9);
mt76_wr(dev, MT_WTBL_RIUCR1,
FIELD_PREP(MT_WTBL_RIUCR1_RATE0, probe_val) |
FIELD_PREP(MT_WTBL_RIUCR1_RATE1, val[0]) |
FIELD_PREP(MT_WTBL_RIUCR1_RATE2_LO, val[0]));
mt76_wr(dev, MT_WTBL_RIUCR2,
FIELD_PREP(MT_WTBL_RIUCR2_RATE2_HI, val[0] >> 8) |
FIELD_PREP(MT_WTBL_RIUCR2_RATE3, val[1]) |
FIELD_PREP(MT_WTBL_RIUCR2_RATE4, val[1]) |
FIELD_PREP(MT_WTBL_RIUCR2_RATE5_LO, val[2]));
mt76_wr(dev, MT_WTBL_RIUCR3,
FIELD_PREP(MT_WTBL_RIUCR3_RATE5_HI, val[2] >> 4) |
FIELD_PREP(MT_WTBL_RIUCR3_RATE6, val[2]) |
FIELD_PREP(MT_WTBL_RIUCR3_RATE7, val[3]));
mt76_wr(dev, MT_WTBL_UPDATE,
FIELD_PREP(MT_WTBL_UPDATE_WLAN_IDX, wcid) |
MT_WTBL_UPDATE_RATE_UPDATE |
MT_WTBL_UPDATE_TX_COUNT_CLEAR);
if (!sta->wcid.tx_rate_set)
mt76_poll(dev, MT_WTBL_UPDATE, MT_WTBL_UPDATE_BUSY, 0, 5000);
sta->rate_count = 2 * MT7603_RATE_RETRY * n_rates;
sta->wcid.tx_rate_set = true;
}
static enum mt7603_cipher_type
mt7603_mac_get_key_info(struct ieee80211_key_conf *key, u8 *key_data)
{
memset(key_data, 0, 32);
if (!key)
return MT_CIPHER_NONE;
if (key->keylen > 32)
return MT_CIPHER_NONE;
memcpy(key_data, key->key, key->keylen);
switch (key->cipher) {
case WLAN_CIPHER_SUITE_WEP40:
return MT_CIPHER_WEP40;
case WLAN_CIPHER_SUITE_WEP104:
return MT_CIPHER_WEP104;
case WLAN_CIPHER_SUITE_TKIP:
/* Rx/Tx MIC keys are swapped */
memcpy(key_data + 16, key->key + 24, 8);
memcpy(key_data + 24, key->key + 16, 8);
return MT_CIPHER_TKIP;
case WLAN_CIPHER_SUITE_CCMP:
return MT_CIPHER_AES_CCMP;
default:
return MT_CIPHER_NONE;
}
}
int mt7603_wtbl_set_key(struct mt7603_dev *dev, int wcid,
struct ieee80211_key_conf *key)
{
enum mt7603_cipher_type cipher;
u32 addr = mt7603_wtbl3_addr(wcid);
u8 key_data[32];
int key_len = sizeof(key_data);
cipher = mt7603_mac_get_key_info(key, key_data);
if (cipher == MT_CIPHER_NONE && key)
return -EOPNOTSUPP;
if (key && (cipher == MT_CIPHER_WEP40 || cipher == MT_CIPHER_WEP104)) {
addr += key->keyidx * 16;
key_len = 16;
}
mt76_wr_copy(dev, addr, key_data, key_len);
addr = mt7603_wtbl1_addr(wcid);
mt76_rmw_field(dev, addr + 2 * 4, MT_WTBL1_W2_KEY_TYPE, cipher);
if (key)
mt76_rmw_field(dev, addr, MT_WTBL1_W0_KEY_IDX, key->keyidx);
mt76_rmw_field(dev, addr, MT_WTBL1_W0_RX_KEY_VALID, !!key);
return 0;
}
static int
mt7603_mac_write_txwi(struct mt7603_dev *dev, __le32 *txwi,
struct sk_buff *skb, struct mt76_queue *q,
struct mt76_wcid *wcid, struct ieee80211_sta *sta,
int pid, struct ieee80211_key_conf *key)
{
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_tx_rate *rate = &info->control.rates[0];
struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
struct ieee80211_vif *vif = info->control.vif;
struct mt7603_vif *mvif;
int wlan_idx;
int hdr_len = ieee80211_get_hdrlen_from_skb(skb);
int tx_count = 8;
u8 frame_type, frame_subtype;
u16 fc = le16_to_cpu(hdr->frame_control);
u8 vif_idx = 0;
u32 val;
u8 bw;
if (vif) {
mvif = (struct mt7603_vif *)vif->drv_priv;
vif_idx = mvif->idx;
if (vif_idx && q >= &dev->mt76.q_tx[MT_TXQ_BEACON])
vif_idx += 0x10;
}
if (sta) {
struct mt7603_sta *msta = (struct mt7603_sta *)sta->drv_priv;
tx_count = msta->rate_count;
}
if (wcid)
wlan_idx = wcid->idx;
else
wlan_idx = MT7603_WTBL_RESERVED;
frame_type = (fc & IEEE80211_FCTL_FTYPE) >> 2;
frame_subtype = (fc & IEEE80211_FCTL_STYPE) >> 4;
val = FIELD_PREP(MT_TXD0_TX_BYTES, skb->len + MT_TXD_SIZE) |
FIELD_PREP(MT_TXD0_Q_IDX, q->hw_idx);
txwi[0] = cpu_to_le32(val);
val = MT_TXD1_LONG_FORMAT |
FIELD_PREP(MT_TXD1_OWN_MAC, vif_idx) |
FIELD_PREP(MT_TXD1_TID,
skb->priority & IEEE80211_QOS_CTL_TID_MASK) |
FIELD_PREP(MT_TXD1_HDR_FORMAT, MT_HDR_FORMAT_802_11) |
FIELD_PREP(MT_TXD1_HDR_INFO, hdr_len / 2) |
FIELD_PREP(MT_TXD1_WLAN_IDX, wlan_idx) |
FIELD_PREP(MT_TXD1_PROTECTED, !!key);
txwi[1] = cpu_to_le32(val);
if (info->flags & IEEE80211_TX_CTL_NO_ACK)
txwi[1] |= cpu_to_le32(MT_TXD1_NO_ACK);
val = FIELD_PREP(MT_TXD2_FRAME_TYPE, frame_type) |
FIELD_PREP(MT_TXD2_SUB_TYPE, frame_subtype) |
FIELD_PREP(MT_TXD2_MULTICAST,
is_multicast_ether_addr(hdr->addr1));
txwi[2] = cpu_to_le32(val);
if (!(info->flags & IEEE80211_TX_CTL_AMPDU))
txwi[2] |= cpu_to_le32(MT_TXD2_BA_DISABLE);
txwi[4] = 0;
val = MT_TXD5_TX_STATUS_HOST | MT_TXD5_SW_POWER_MGMT |
FIELD_PREP(MT_TXD5_PID, pid);
txwi[5] = cpu_to_le32(val);
txwi[6] = 0;
if (rate->idx >= 0 && rate->count &&
!(info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE)) {
bool stbc = info->flags & IEEE80211_TX_CTL_STBC;
u16 rateval = mt7603_mac_tx_rate_val(dev, rate, stbc, &bw);
txwi[2] |= cpu_to_le32(MT_TXD2_FIX_RATE);
val = MT_TXD6_FIXED_BW |
FIELD_PREP(MT_TXD6_BW, bw) |
FIELD_PREP(MT_TXD6_TX_RATE, rateval);
txwi[6] |= cpu_to_le32(val);
if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
txwi[6] |= cpu_to_le32(MT_TXD6_SGI);
if (!(rate->flags & IEEE80211_TX_RC_MCS))
txwi[2] |= cpu_to_le32(MT_TXD2_BA_DISABLE);
tx_count = rate->count;
}
/* use maximum tx count for beacons and buffered multicast */
if (q >= &dev->mt76.q_tx[MT_TXQ_BEACON])
tx_count = 0x1f;
val = FIELD_PREP(MT_TXD3_REM_TX_COUNT, tx_count) |
FIELD_PREP(MT_TXD3_SEQ, le16_to_cpu(hdr->seq_ctrl));
txwi[3] = cpu_to_le32(val);
if (key) {
u64 pn = atomic64_inc_return(&key->tx_pn);
txwi[3] |= cpu_to_le32(MT_TXD3_PN_VALID);
txwi[4] = cpu_to_le32(pn & GENMASK(31, 0));
txwi[5] |= cpu_to_le32(FIELD_PREP(MT_TXD5_PN_HIGH, pn >> 32));
}
txwi[7] = 0;
return 0;
}
int mt7603_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
struct sk_buff *skb, struct mt76_queue *q,
struct mt76_wcid *wcid, struct ieee80211_sta *sta,
u32 *tx_info)
{
struct mt7603_dev *dev = container_of(mdev, struct mt7603_dev, mt76);
struct mt7603_sta *msta = container_of(wcid, struct mt7603_sta, wcid);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
struct ieee80211_key_conf *key = info->control.hw_key;
int pid;
if (!wcid)
wcid = &dev->global_sta.wcid;
if (sta) {
msta = (struct mt7603_sta *)sta->drv_priv;
if ((info->flags & (IEEE80211_TX_CTL_NO_PS_BUFFER |
IEEE80211_TX_CTL_CLEAR_PS_FILT)) ||
(info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
mt7603_wtbl_set_ps(dev, msta, false);
}
pid = mt76_tx_status_skb_add(mdev, wcid, skb);
if (info->flags & IEEE80211_TX_CTL_RATE_CTRL_PROBE) {
spin_lock_bh(&dev->mt76.lock);
msta->rate_probe = true;
mt7603_wtbl_set_rates(dev, msta, &info->control.rates[0],
msta->rates);
spin_unlock_bh(&dev->mt76.lock);
}
mt7603_mac_write_txwi(dev, txwi_ptr, skb, q, wcid, sta, pid, key);
return 0;
}
static bool
mt7603_fill_txs(struct mt7603_dev *dev, struct mt7603_sta *sta,
struct ieee80211_tx_info *info, __le32 *txs_data)
{
struct ieee80211_supported_band *sband;
int final_idx = 0;
u32 final_rate;
u32 final_rate_flags;
bool final_mpdu;
bool ack_timeout;