linux_dsm_epyc7002/drivers/net/wireless/ath/ath9k/tx99.c
Felix Fietkau 6df0580be8 ath9k: add back support for using active monitor interfaces for tx99
Various documented examples on how to set up tx99 with ath9k rely
on setting up a regular monitor interface for setting the channel.
My previous patch "ath9k: fix tx99 with monitor mode interface" made
it possible to set it up this way again. However, it was removing support
for using an active monitor interface, which is required for controlling
the bitrate as well, since the bitrate is not passed down with a regular
monitor interface.

This patch partially reverts the previous one, but keeps support for using
a regular monitor interface to keep documented steps working in cases
where the bitrate does not matter

Fixes: d9c52fd17c ("ath9k: fix tx99 with monitor mode interface")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
2018-10-02 07:54:26 +03:00

286 lines
6.8 KiB
C

/*
* Copyright (c) 2013 Qualcomm Atheros, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "ath9k.h"
static void ath9k_tx99_stop(struct ath_softc *sc)
{
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
ath_drain_all_txq(sc);
ath_startrecv(sc);
ath9k_hw_set_interrupts(ah);
ath9k_hw_enable_interrupts(ah);
ieee80211_wake_queues(sc->hw);
kfree_skb(sc->tx99_skb);
sc->tx99_skb = NULL;
sc->tx99_state = false;
ath9k_hw_tx99_stop(sc->sc_ah);
ath_dbg(common, XMIT, "TX99 stopped\n");
}
static struct sk_buff *ath9k_build_tx99_skb(struct ath_softc *sc)
{
static u8 PN9Data[] = {0xff, 0x87, 0xb8, 0x59, 0xb7, 0xa1, 0xcc, 0x24,
0x57, 0x5e, 0x4b, 0x9c, 0x0e, 0xe9, 0xea, 0x50,
0x2a, 0xbe, 0xb4, 0x1b, 0xb6, 0xb0, 0x5d, 0xf1,
0xe6, 0x9a, 0xe3, 0x45, 0xfd, 0x2c, 0x53, 0x18,
0x0c, 0xca, 0xc9, 0xfb, 0x49, 0x37, 0xe5, 0xa8,
0x51, 0x3b, 0x2f, 0x61, 0xaa, 0x72, 0x18, 0x84,
0x02, 0x23, 0x23, 0xab, 0x63, 0x89, 0x51, 0xb3,
0xe7, 0x8b, 0x72, 0x90, 0x4c, 0xe8, 0xfb, 0xc0};
u32 len = 1200;
struct ieee80211_tx_rate *rate;
struct ieee80211_hw *hw = sc->hw;
struct ath_hw *ah = sc->sc_ah;
struct ieee80211_hdr *hdr;
struct ieee80211_tx_info *tx_info;
struct sk_buff *skb;
struct ath_vif *avp;
skb = alloc_skb(len, GFP_KERNEL);
if (!skb)
return NULL;
skb_put(skb, len);
memset(skb->data, 0, len);
hdr = (struct ieee80211_hdr *)skb->data;
hdr->frame_control = cpu_to_le16(IEEE80211_FTYPE_DATA);
hdr->duration_id = 0;
memcpy(hdr->addr1, hw->wiphy->perm_addr, ETH_ALEN);
memcpy(hdr->addr2, hw->wiphy->perm_addr, ETH_ALEN);
memcpy(hdr->addr3, hw->wiphy->perm_addr, ETH_ALEN);
if (sc->tx99_vif) {
avp = (struct ath_vif *) sc->tx99_vif->drv_priv;
hdr->seq_ctrl |= cpu_to_le16(avp->seq_no);
}
tx_info = IEEE80211_SKB_CB(skb);
memset(tx_info, 0, sizeof(*tx_info));
rate = &tx_info->control.rates[0];
tx_info->band = sc->cur_chan->chandef.chan->band;
tx_info->flags = IEEE80211_TX_CTL_NO_ACK;
tx_info->control.vif = sc->tx99_vif;
rate->count = 1;
if (ah->curchan && IS_CHAN_HT(ah->curchan)) {
rate->flags |= IEEE80211_TX_RC_MCS;
if (IS_CHAN_HT40(ah->curchan))
rate->flags |= IEEE80211_TX_RC_40_MHZ_WIDTH;
}
memcpy(skb->data + sizeof(*hdr), PN9Data, sizeof(PN9Data));
return skb;
}
static void ath9k_tx99_deinit(struct ath_softc *sc)
{
ath_reset(sc, NULL);
ath9k_ps_wakeup(sc);
ath9k_tx99_stop(sc);
ath9k_ps_restore(sc);
}
static int ath9k_tx99_init(struct ath_softc *sc)
{
struct ieee80211_hw *hw = sc->hw;
struct ath_hw *ah = sc->sc_ah;
struct ath_common *common = ath9k_hw_common(ah);
struct ath_tx_control txctl;
int r;
if (test_bit(ATH_OP_INVALID, &common->op_flags)) {
ath_err(common,
"driver is in invalid state unable to use TX99");
return -EINVAL;
}
sc->tx99_skb = ath9k_build_tx99_skb(sc);
if (!sc->tx99_skb)
return -ENOMEM;
memset(&txctl, 0, sizeof(txctl));
txctl.txq = sc->tx.txq_map[IEEE80211_AC_VO];
ath_reset(sc, NULL);
ath9k_ps_wakeup(sc);
ath9k_hw_disable_interrupts(ah);
ath_drain_all_txq(sc);
ath_stoprecv(sc);
sc->tx99_state = true;
ieee80211_stop_queues(hw);
if (sc->tx99_power == MAX_RATE_POWER + 1)
sc->tx99_power = MAX_RATE_POWER;
ath9k_hw_tx99_set_txpower(ah, sc->tx99_power);
r = ath9k_tx99_send(sc, sc->tx99_skb, &txctl);
if (r) {
ath_dbg(common, XMIT, "Failed to xmit TX99 skb\n");
return r;
}
ath_dbg(common, XMIT, "TX99 xmit started using %d ( %ddBm)\n",
sc->tx99_power,
sc->tx99_power / 2);
/* We leave the hardware awake as it will be chugging on */
return 0;
}
static ssize_t read_file_tx99(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char buf[3];
unsigned int len;
len = sprintf(buf, "%d\n", sc->tx99_state);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t write_file_tx99(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
struct ath_common *common = ath9k_hw_common(sc->sc_ah);
char buf[32];
bool start;
ssize_t len;
int r;
if (count < 1)
return -EINVAL;
if (sc->cur_chan->nvifs > 1)
return -EOPNOTSUPP;
len = min(count, sizeof(buf) - 1);
if (copy_from_user(buf, user_buf, len))
return -EFAULT;
buf[len] = '\0';
if (strtobool(buf, &start))
return -EINVAL;
mutex_lock(&sc->mutex);
if (start == sc->tx99_state) {
if (!start)
goto out;
ath_dbg(common, XMIT, "Resetting TX99\n");
ath9k_tx99_deinit(sc);
}
if (!start) {
ath9k_tx99_deinit(sc);
goto out;
}
r = ath9k_tx99_init(sc);
if (r) {
mutex_unlock(&sc->mutex);
return r;
}
out:
mutex_unlock(&sc->mutex);
return count;
}
static const struct file_operations fops_tx99 = {
.read = read_file_tx99,
.write = write_file_tx99,
.open = simple_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
static ssize_t read_file_tx99_power(struct file *file,
char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
char buf[32];
unsigned int len;
len = sprintf(buf, "%d (%d dBm)\n",
sc->tx99_power,
sc->tx99_power / 2);
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static ssize_t write_file_tx99_power(struct file *file,
const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct ath_softc *sc = file->private_data;
int r;
u8 tx_power;
r = kstrtou8_from_user(user_buf, count, 0, &tx_power);
if (r)
return r;
if (tx_power > MAX_RATE_POWER)
return -EINVAL;
sc->tx99_power = tx_power;
ath9k_ps_wakeup(sc);
ath9k_hw_tx99_set_txpower(sc->sc_ah, sc->tx99_power);
ath9k_ps_restore(sc);
return count;
}
static const struct file_operations fops_tx99_power = {
.read = read_file_tx99_power,
.write = write_file_tx99_power,
.open = simple_open,
.owner = THIS_MODULE,
.llseek = default_llseek,
};
void ath9k_tx99_init_debug(struct ath_softc *sc)
{
if (!AR_SREV_9280_20_OR_LATER(sc->sc_ah))
return;
debugfs_create_file("tx99", 0600,
sc->debug.debugfs_phy, sc,
&fops_tx99);
debugfs_create_file("tx99_power", 0600,
sc->debug.debugfs_phy, sc,
&fops_tx99_power);
}