This series fixes an occasional startup failure when BT
coexistence is enabled and makes P2P mode work
(the two are unrelated but sending as a series since the same files
are modified).
Tested on RS9116 in P2P client mode against an Android phone (S8, Android 9)
For an unknown reason GO mode does not work against the phone but it
does work against a second RS9116 device.
In this case Android does not send a response to the 3rd WPA handshake
packet. It is difficult to debug this without the phone wpa_supplicant
logs which I don't have.
Regression tested OK for STA and AP modes.
V2:
* rebase against wireless-drivers-next
* add cc: stable to patches 2 & 3
Martin Fuzzey (3):
rsi: fix occasional initialisation failure with BT coex
rsi: fix key enabled check causing unwanted encryption for vap_id > 0
rsi: fix rate mask set leading to P2P failure
drivers/net/wireless/rsi/rsi_91x_core.c | 2 +
drivers/net/wireless/rsi/rsi_91x_hal.c | 10 ++--
drivers/net/wireless/rsi/rsi_91x_mac80211.c | 74 +++++++++--------------------
drivers/net/wireless/rsi/rsi_91x_main.c | 16 +++++--
drivers/net/wireless/rsi/rsi_91x_mgmt.c | 24 +++++++---
drivers/net/wireless/rsi/rsi_main.h | 15 ++++--
6 files changed, 72 insertions(+), 69 deletions(-)
--
1.9.1
When BT coexistence is enabled (eg oper mode 13, which is the default)
the initialisation on startup sometimes silently fails.
In a normal initialisation we see
usb 1-1.3: Product: Wireless USB Network Module
usb 1-1.3: Manufacturer: Redpine Signals, Inc.
usb 1-1.3: SerialNumber: 000000000001
rsi_91x: rsi_probe: Initialized os intf ops
rsi_91x: rsi_load_9116_firmware: Loading chunk 0
rsi_91x: rsi_load_9116_firmware: Loading chunk 1
rsi_91x: rsi_load_9116_firmware: Loading chunk 2
rsi_91x: Max Stations Allowed = 1
But sometimes the last log is missing and the wlan net device is
not created.
Running a userspace loop that resets the hardware via a GPIO shows the
problem occurring ~5/100 resets.
The problem does not occur in oper mode 1 (wifi only).
Adding logs shows that the initialisation state machine requests a MAC
reset via rsi_send_reset_mac() but the firmware does not reply, leading
to the initialisation sequence being incomplete.
Fix this by delaying attaching the BT adapter until the wifi
initialisation has completed.
With this applied I have done > 300 reset loops with no errors.
Fixes: 716b840c7641 ("rsi: handle BT traffic in driver")
Signed-off-by: Martin Fuzzey <[email protected]>
CC: [email protected]
---
drivers/net/wireless/rsi/rsi_91x_main.c | 16 +++++++++++++---
drivers/net/wireless/rsi/rsi_91x_mgmt.c | 3 +++
drivers/net/wireless/rsi/rsi_main.h | 2 ++
3 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/drivers/net/wireless/rsi/rsi_91x_main.c b/drivers/net/wireless/rsi/rsi_91x_main.c
index d984832..143224a 100644
--- a/drivers/net/wireless/rsi/rsi_91x_main.c
+++ b/drivers/net/wireless/rsi/rsi_91x_main.c
@@ -211,9 +211,10 @@ int rsi_read_pkt(struct rsi_common *common, u8 *rx_pkt, s32 rcv_pkt_len)
bt_pkt_type = frame_desc[offset + BT_RX_PKT_TYPE_OFST];
if (bt_pkt_type == BT_CARD_READY_IND) {
rsi_dbg(INFO_ZONE, "BT Card ready recvd\n");
- if (rsi_bt_ops.attach(common, &g_proto_ops))
- rsi_dbg(ERR_ZONE,
- "Failed to attach BT module\n");
+ if (common->fsm_state == FSM_MAC_INIT_DONE)
+ rsi_attach_bt(common);
+ else
+ common->bt_defer_attach = true;
} else {
if (common->bt_adapter)
rsi_bt_ops.recv_pkt(common->bt_adapter,
@@ -278,6 +279,15 @@ void rsi_set_bt_context(void *priv, void *bt_context)
}
#endif
+void rsi_attach_bt(struct rsi_common *common)
+{
+#ifdef CONFIG_RSI_COEX
+ if (rsi_bt_ops.attach(common, &g_proto_ops))
+ rsi_dbg(ERR_ZONE,
+ "Failed to attach BT module\n");
+#endif
+}
+
/**
* rsi_91x_init() - This function initializes os interface operations.
* @oper_mode: One of DEV_OPMODE_*.
diff --git a/drivers/net/wireless/rsi/rsi_91x_mgmt.c b/drivers/net/wireless/rsi/rsi_91x_mgmt.c
index 891fd5f..a25742a 100644
--- a/drivers/net/wireless/rsi/rsi_91x_mgmt.c
+++ b/drivers/net/wireless/rsi/rsi_91x_mgmt.c
@@ -2071,6 +2071,9 @@ static int rsi_handle_ta_confirm_type(struct rsi_common *common,
if (common->reinit_hw) {
complete(&common->wlan_init_completion);
} else {
+ if (common->bt_defer_attach)
+ rsi_attach_bt(common);
+
return rsi_mac80211_attach(common);
}
}
diff --git a/drivers/net/wireless/rsi/rsi_main.h b/drivers/net/wireless/rsi/rsi_main.h
index 0f53585..a3e4fd5 100644
--- a/drivers/net/wireless/rsi/rsi_main.h
+++ b/drivers/net/wireless/rsi/rsi_main.h
@@ -320,6 +320,7 @@ struct rsi_common {
struct ieee80211_vif *roc_vif;
bool eapol4_confirm;
+ bool bt_defer_attach;
void *bt_adapter;
struct cfg80211_scan_request *hwscan;
@@ -401,5 +402,6 @@ struct rsi_host_intf_ops {
enum rsi_host_intf rsi_get_host_intf(void *priv);
void rsi_set_bt_context(void *priv, void *bt_context);
+void rsi_attach_bt(struct rsi_common *common);
#endif
--
1.9.1
My previous patch checked if encryption should be enabled by directly
checking info->control.hw_key (like the downstream driver).
However that missed that the control and driver_info members of
struct ieee80211_tx_info are union fields.
Due to this when rsi_core_xmit() updates fields in "tx_params"
(driver_info) it can overwrite the control.hw_key, causing the result
of the later test to be incorrect.
With the current structure layout the first byte of control.hw_key is
overlayed with the vap_id so, since we only test if control.hw_key is
NULL / non NULL, a non zero vap_id will incorrectly enable encryption.
In basic STA and AP modes the vap_id is always zero so it works but in
P2P client mode a second VIF is created causing vap_id to be non zero
and hence encryption to be enabled before keys have been set.
Fix this by extracting the key presence flag to a new field in the driver
private tx_params structure and populating it first.
Fixes: 314538041b56 ("rsi: fix AP mode with WPA failure due to encrypted EAPOL")
Signed-off-by: Martin Fuzzey <[email protected]>
CC: [email protected]
---
drivers/net/wireless/rsi/rsi_91x_core.c | 2 ++
drivers/net/wireless/rsi/rsi_91x_hal.c | 2 +-
drivers/net/wireless/rsi/rsi_main.h | 1 +
3 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/wireless/rsi/rsi_91x_core.c b/drivers/net/wireless/rsi/rsi_91x_core.c
index a48e616..6bfaab4 100644
--- a/drivers/net/wireless/rsi/rsi_91x_core.c
+++ b/drivers/net/wireless/rsi/rsi_91x_core.c
@@ -399,6 +399,8 @@ void rsi_core_xmit(struct rsi_common *common, struct sk_buff *skb)
info = IEEE80211_SKB_CB(skb);
tx_params = (struct skb_info *)info->driver_data;
+ /* info->driver_data and info->control part of union so make copy */
+ tx_params->have_key = !!info->control.hw_key;
wh = (struct ieee80211_hdr *)&skb->data[0];
tx_params->sta_id = 0;
diff --git a/drivers/net/wireless/rsi/rsi_91x_hal.c b/drivers/net/wireless/rsi/rsi_91x_hal.c
index f4a26f1..2aa9f0b 100644
--- a/drivers/net/wireless/rsi/rsi_91x_hal.c
+++ b/drivers/net/wireless/rsi/rsi_91x_hal.c
@@ -203,7 +203,7 @@ int rsi_prepare_data_desc(struct rsi_common *common, struct sk_buff *skb)
wh->frame_control |= cpu_to_le16(RSI_SET_PS_ENABLE);
if ((!(info->flags & IEEE80211_TX_INTFL_DONT_ENCRYPT)) &&
- info->control.hw_key) {
+ tx_params->have_key) {
if (rsi_is_cipher_wep(common))
ieee80211_size += 4;
else
diff --git a/drivers/net/wireless/rsi/rsi_main.h b/drivers/net/wireless/rsi/rsi_main.h
index a3e4fd5..810485a 100644
--- a/drivers/net/wireless/rsi/rsi_main.h
+++ b/drivers/net/wireless/rsi/rsi_main.h
@@ -139,6 +139,7 @@ struct skb_info {
u8 internal_hdr_size;
struct ieee80211_vif *vif;
u8 vap_id;
+ bool have_key;
};
enum edca_queue {
--
1.9.1
P2P client mode was only working the first time.
On subsequent connection attempts the group was successfully created but
no data was sent (no transmitted data packets were seen with a sniffer).
The reason for this was that the hardware was being configured in fixed
rate mode with rate RSI_RATE_1 (1Mbps) which is not valid in the 5GHz band.
In P2P mode wpa_supplicant uses NL80211_CMD_SET_TX_BITRATE_MASK to disallow
the 11b rates in the 2.4GHz band which updated common->fixedrate_mask.
rsi_set_min_rate() then used the fixedrate_mask to calculate the minimum
allowed rate, or 0xffff = auto if none was found.
However that calculation did not account for the different rate sets
allowed in the different bands leading to the error.
Fixing set_min_rate() would result in 6Mb/s being used all the time
which is not what we want either.
The reason the problem did not occur on the first connection is that
rsi_mac80211_set_rate_mask() only updated the fixedrate_mask for
the *current* band. When it was called that was still 2.4GHz as the
switch is done later. So the when set_min_rate() was subsequently
called after the switch to 5GHz it still had a mask of zero, leading
to defaulting to auto mode.
Fix this by differentiating the case of a single rate being
requested, in which case the hardware will be used in fixed rate
mode with just that rate, and multiple rates being requested,
in which case we remain in auto mode but the firmware rate selection
algorithm is configured with a restricted set of rates.
Fixes: dad0d04fa7ba ("rsi: Add RS9113 wireless driver")
Signed-off-by: Martin Fuzzey <[email protected]>
CC: [email protected]
---
drivers/net/wireless/rsi/rsi_91x_hal.c | 8 ++--
drivers/net/wireless/rsi/rsi_91x_mac80211.c | 74 +++++++++--------------------
drivers/net/wireless/rsi/rsi_91x_mgmt.c | 21 +++++---
drivers/net/wireless/rsi/rsi_main.h | 12 +++--
4 files changed, 50 insertions(+), 65 deletions(-)
diff --git a/drivers/net/wireless/rsi/rsi_91x_hal.c b/drivers/net/wireless/rsi/rsi_91x_hal.c
index 2aa9f0b..dca81a4 100644
--- a/drivers/net/wireless/rsi/rsi_91x_hal.c
+++ b/drivers/net/wireless/rsi/rsi_91x_hal.c
@@ -214,15 +214,17 @@ int rsi_prepare_data_desc(struct rsi_common *common, struct sk_buff *skb)
RSI_WIFI_DATA_Q);
data_desc->header_len = ieee80211_size;
- if (common->min_rate != RSI_RATE_AUTO) {
+ if (common->rate_config[common->band].fixed_enabled) {
/* Send fixed rate */
+ u16 fixed_rate = common->rate_config[common->band].fixed_hw_rate;
+
data_desc->frame_info = cpu_to_le16(RATE_INFO_ENABLE);
- data_desc->rate_info = cpu_to_le16(common->min_rate);
+ data_desc->rate_info = cpu_to_le16(fixed_rate);
if (conf_is_ht40(&common->priv->hw->conf))
data_desc->bbp_info = cpu_to_le16(FULL40M_ENABLE);
- if ((common->vif_info[0].sgi) && (common->min_rate & 0x100)) {
+ if (common->vif_info[0].sgi && (fixed_rate & 0x100)) {
/* Only MCS rates */
data_desc->rate_info |=
cpu_to_le16(ENABLE_SHORTGI_RATE);
diff --git a/drivers/net/wireless/rsi/rsi_91x_mac80211.c b/drivers/net/wireless/rsi/rsi_91x_mac80211.c
index b66975f..e70c1c7f 100644
--- a/drivers/net/wireless/rsi/rsi_91x_mac80211.c
+++ b/drivers/net/wireless/rsi/rsi_91x_mac80211.c
@@ -510,7 +510,6 @@ static int rsi_mac80211_add_interface(struct ieee80211_hw *hw,
if ((vif->type == NL80211_IFTYPE_AP) ||
(vif->type == NL80211_IFTYPE_P2P_GO)) {
rsi_send_rx_filter_frame(common, DISALLOW_BEACONS);
- common->min_rate = RSI_RATE_AUTO;
for (i = 0; i < common->max_stations; i++)
common->stations[i].sta = NULL;
}
@@ -1228,20 +1227,32 @@ static int rsi_mac80211_set_rate_mask(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
const struct cfg80211_bitrate_mask *mask)
{
+ const unsigned int mcs_offset = ARRAY_SIZE(rsi_rates);
struct rsi_hw *adapter = hw->priv;
struct rsi_common *common = adapter->priv;
- enum nl80211_band band = hw->conf.chandef.chan->band;
+ int i;
mutex_lock(&common->mutex);
- common->fixedrate_mask[band] = 0;
- if (mask->control[band].legacy == 0xfff) {
- common->fixedrate_mask[band] =
- (mask->control[band].ht_mcs[0] << 12);
- } else {
- common->fixedrate_mask[band] =
- mask->control[band].legacy;
+ for (i = 0; i < ARRAY_SIZE(common->rate_config); i++) {
+ struct rsi_rate_config *cfg = &common->rate_config[i];
+ u32 bm;
+
+ bm = mask->control[i].legacy | (mask->control[i].ht_mcs[0] << mcs_offset);
+ if (hweight32(bm) == 1) { /* single rate */
+ int rate_index = ffs(bm) - 1;
+
+ if (rate_index < mcs_offset)
+ cfg->fixed_hw_rate = rsi_rates[rate_index].hw_value;
+ else
+ cfg->fixed_hw_rate = rsi_mcsrates[rate_index - mcs_offset];
+ cfg->fixed_enabled = true;
+ } else {
+ cfg->configured_mask = bm;
+ cfg->fixed_enabled = false;
+ }
}
+
mutex_unlock(&common->mutex);
return 0;
@@ -1378,46 +1389,6 @@ void rsi_indicate_pkt_to_os(struct rsi_common *common,
ieee80211_rx_irqsafe(hw, skb);
}
-static void rsi_set_min_rate(struct ieee80211_hw *hw,
- struct ieee80211_sta *sta,
- struct rsi_common *common)
-{
- u8 band = hw->conf.chandef.chan->band;
- u8 ii;
- u32 rate_bitmap;
- bool matched = false;
-
- common->bitrate_mask[band] = sta->supp_rates[band];
-
- rate_bitmap = (common->fixedrate_mask[band] & sta->supp_rates[band]);
-
- if (rate_bitmap & 0xfff) {
- /* Find out the min rate */
- for (ii = 0; ii < ARRAY_SIZE(rsi_rates); ii++) {
- if (rate_bitmap & BIT(ii)) {
- common->min_rate = rsi_rates[ii].hw_value;
- matched = true;
- break;
- }
- }
- }
-
- common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
-
- if ((common->vif_info[0].is_ht) && (rate_bitmap >> 12)) {
- for (ii = 0; ii < ARRAY_SIZE(rsi_mcsrates); ii++) {
- if ((rate_bitmap >> 12) & BIT(ii)) {
- common->min_rate = rsi_mcsrates[ii];
- matched = true;
- break;
- }
- }
- }
-
- if (!matched)
- common->min_rate = 0xffff;
-}
-
/**
* rsi_mac80211_sta_add() - This function notifies driver about a peer getting
* connected.
@@ -1516,9 +1487,9 @@ static int rsi_mac80211_sta_add(struct ieee80211_hw *hw,
if ((vif->type == NL80211_IFTYPE_STATION) ||
(vif->type == NL80211_IFTYPE_P2P_CLIENT)) {
- rsi_set_min_rate(hw, sta, common);
+ common->bitrate_mask[common->band] = sta->supp_rates[common->band];
+ common->vif_info[0].is_ht = sta->ht_cap.ht_supported;
if (sta->ht_cap.ht_supported) {
- common->vif_info[0].is_ht = true;
common->bitrate_mask[NL80211_BAND_2GHZ] =
sta->supp_rates[NL80211_BAND_2GHZ];
if ((sta->ht_cap.cap & IEEE80211_HT_CAP_SGI_20) ||
@@ -1592,7 +1563,6 @@ static int rsi_mac80211_sta_remove(struct ieee80211_hw *hw,
bss->qos = sta->wme;
common->bitrate_mask[NL80211_BAND_2GHZ] = 0;
common->bitrate_mask[NL80211_BAND_5GHZ] = 0;
- common->min_rate = 0xffff;
common->vif_info[0].is_ht = false;
common->vif_info[0].sgi = false;
common->vif_info[0].seq_start = 0;
diff --git a/drivers/net/wireless/rsi/rsi_91x_mgmt.c b/drivers/net/wireless/rsi/rsi_91x_mgmt.c
index a25742a..0848f7a 100644
--- a/drivers/net/wireless/rsi/rsi_91x_mgmt.c
+++ b/drivers/net/wireless/rsi/rsi_91x_mgmt.c
@@ -276,7 +276,7 @@ static void rsi_set_default_parameters(struct rsi_common *common)
common->channel_width = BW_20MHZ;
common->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;
common->channel = 1;
- common->min_rate = 0xffff;
+ memset(&common->rate_config, 0, sizeof(common->rate_config));
common->fsm_state = FSM_CARD_NOT_READY;
common->iface_down = true;
common->endpoint = EP_2GHZ_20MHZ;
@@ -1314,7 +1314,7 @@ static int rsi_send_auto_rate_request(struct rsi_common *common,
u8 band = hw->conf.chandef.chan->band;
u8 num_supported_rates = 0;
u8 rate_table_offset, rate_offset = 0;
- u32 rate_bitmap;
+ u32 rate_bitmap, configured_rates;
u16 *selected_rates, min_rate;
bool is_ht = false, is_sgi = false;
u16 frame_len = sizeof(struct rsi_auto_rate);
@@ -1364,6 +1364,10 @@ static int rsi_send_auto_rate_request(struct rsi_common *common,
is_sgi = true;
}
+ /* Limit to any rates administratively configured by cfg80211 */
+ configured_rates = common->rate_config[band].configured_mask ?: 0xffffffff;
+ rate_bitmap &= configured_rates;
+
if (band == NL80211_BAND_2GHZ) {
if ((rate_bitmap == 0) && (is_ht))
min_rate = RSI_RATE_MCS0;
@@ -1389,10 +1393,13 @@ static int rsi_send_auto_rate_request(struct rsi_common *common,
num_supported_rates = jj;
if (is_ht) {
- for (ii = 0; ii < ARRAY_SIZE(mcs); ii++)
- selected_rates[jj++] = mcs[ii];
- num_supported_rates += ARRAY_SIZE(mcs);
- rate_offset += ARRAY_SIZE(mcs);
+ for (ii = 0; ii < ARRAY_SIZE(mcs); ii++) {
+ if (configured_rates & BIT(ii + ARRAY_SIZE(rsi_rates))) {
+ selected_rates[jj++] = mcs[ii];
+ num_supported_rates++;
+ rate_offset++;
+ }
+ }
}
sort(selected_rates, jj, sizeof(u16), &rsi_compare, NULL);
@@ -1482,7 +1489,7 @@ void rsi_inform_bss_status(struct rsi_common *common,
qos_enable,
aid, sta_id,
vif);
- if (common->min_rate == 0xffff)
+ if (!common->rate_config[common->band].fixed_enabled)
rsi_send_auto_rate_request(common, sta, sta_id, vif);
if (opmode == RSI_OPMODE_STA &&
!(assoc_cap & WLAN_CAPABILITY_PRIVACY) &&
diff --git a/drivers/net/wireless/rsi/rsi_main.h b/drivers/net/wireless/rsi/rsi_main.h
index 810485a..dcf8fb4 100644
--- a/drivers/net/wireless/rsi/rsi_main.h
+++ b/drivers/net/wireless/rsi/rsi_main.h
@@ -61,6 +61,7 @@ enum RSI_FSM_STATES {
extern u32 rsi_zone_enabled;
extern __printf(2, 3) void rsi_dbg(u32 zone, const char *fmt, ...);
+#define RSI_MAX_BANDS 2
#define RSI_MAX_VIFS 3
#define NUM_EDCA_QUEUES 4
#define IEEE80211_ADDR_LEN 6
@@ -230,6 +231,12 @@ struct rsi_9116_features {
u32 ps_options;
};
+struct rsi_rate_config {
+ u32 configured_mask; /* configured by mac80211 bits 0-11=legacy 12+ mcs */
+ u16 fixed_hw_rate;
+ bool fixed_enabled;
+};
+
struct rsi_common {
struct rsi_hw *priv;
struct vif_priv vif_info[RSI_MAX_VIFS];
@@ -255,8 +262,8 @@ struct rsi_common {
u8 channel_width;
u16 rts_threshold;
- u16 bitrate_mask[2];
- u32 fixedrate_mask[2];
+ u32 bitrate_mask[RSI_MAX_BANDS];
+ struct rsi_rate_config rate_config[RSI_MAX_BANDS];
u8 rf_reset;
struct transmit_q_stats tx_stats;
@@ -277,7 +284,6 @@ struct rsi_common {
u8 mac_id;
u8 radio_id;
u16 rate_pwr[20];
- u16 min_rate;
/* WMM algo related */
u8 selected_qnum;
--
1.9.1
Martin Fuzzey <[email protected]> writes:
> This series fixes an occasional startup failure when BT
> coexistence is enabled and makes P2P mode work
> (the two are unrelated but sending as a series since the same files
> are modified).
>
> Tested on RS9116 in P2P client mode against an Android phone (S8, Android 9)
>
> For an unknown reason GO mode does not work against the phone but it
> does work against a second RS9116 device.
> In this case Android does not send a response to the 3rd WPA handshake
> packet. It is difficult to debug this without the phone wpa_supplicant
> logs which I don't have.
>
> Regression tested OK for STA and AP modes.
>
> V2:
> * rebase against wireless-drivers-next
> * add cc: stable to patches 2 & 3
>
> Martin Fuzzey (3):
> rsi: fix occasional initialisation failure with BT coex
> rsi: fix key enabled check causing unwanted encryption for vap_id > 0
> rsi: fix rate mask set leading to P2P failure
BTW thanks for the outstanding cover letter and commit logs in the
patches, it was so easy for me to understand the background and the
level of testing these patches have had. If everyone would write their
patches like this my job would be a lot easier :)
I'm going to use this patchset as an example in the submittingpatches
wiki page.
--
https://patchwork.kernel.org/project/linux-wireless/list/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches