[PATCH v5] wfx: use container_of() to get vif

Jaehee Park
2022-05-03T18:21:57Z

Currently, upon virtual interface creation, wfx_add_interface() stores
a reference to the corresponding struct ieee80211_vif in private data,
for later usage. This is not needed when using the container_of
construct. This construct already has all the info it needs to retrieve
the reference to the corresponding struct from the offset that is
already available, inherent in container_of(), between its type and
member inputs (struct ieee80211_vif and drv_priv, respectively).
Remove vif (which was previously storing the reference to the struct
ieee80211_vif) from the struct wfx_vif, define a function
wvif_to_vif(wvif) for container_of(), and replace all wvif->vif with
the newly defined container_of construct.

Signed-off-by: Jaehee Park <jhpark1013@gmail.com>
---
v2
- Sequenced the wfx.h file (with the new defines) to show up first on
the diff, which makes the ordering of the diff more logical.

v3
- Made edits to the commit message.
- Shortened the macro name from wvif_to_vif to to_vif.
- For functions that had more than one instance of vif, defined one
reference vif at the beginning of the function and used that instead.
- Broke the if-statements that ran long into two lines.

v4
- Changed macro into function and named it back to wvif_to_vif
- Fit all lines in patch to 80 columns
- Decared a reference to vif at the beginning of all the functions
where it's being used

v5
- Placed longest declarations first

drivers/net/wireless/silabs/wfx/wfx.h | 6 +-
drivers/net/wireless/silabs/wfx/data_rx.c | 5 +-
drivers/net/wireless/silabs/wfx/data_tx.c | 3 +-
drivers/net/wireless/silabs/wfx/key.c | 4 +-
drivers/net/wireless/silabs/wfx/queue.c | 3 +-
drivers/net/wireless/silabs/wfx/scan.c | 11 ++--
drivers/net/wireless/silabs/wfx/sta.c | 71 ++++++++++++++---------
7 files changed, 65 insertions(+), 38 deletions(-)

diff --git a/drivers/net/wireless/silabs/wfx/wfx.h b/drivers/net/wireless/silabs/wfx/wfx.h
index 6594cc647c2f..718693a4273d 100644
--- a/drivers/net/wireless/silabs/wfx/wfx.h
+++ b/drivers/net/wireless/silabs/wfx/wfx.h
@@ -61,7 +61,6 @@ struct wfx_dev {

struct wfx_vif {
struct wfx_dev *wdev;
- struct ieee80211_vif *vif;
struct ieee80211_channel *channel;
int id;

@@ -91,6 +90,11 @@ struct wfx_vif {
struct completion set_pm_mode_complete;
};

+static inline struct ieee80211_vif *wvif_to_vif(struct wfx_vif *wvif)
+{
+ return container_of((void *)wvif, struct ieee80211_vif, drv_priv);
+}
+
static inline struct wfx_vif *wdev_to_wvif(struct wfx_dev *wdev, int vif_id)
{
if (vif_id >= ARRAY_SIZE(wdev->vif)) {
diff --git a/drivers/net/wireless/silabs/wfx/data_rx.c b/drivers/net/wireless/silabs/wfx/data_rx.c
index a4b5ffe158e4..e099a9e65bae 100644
--- a/drivers/net/wireless/silabs/wfx/data_rx.c
+++ b/drivers/net/wireless/silabs/wfx/data_rx.c
@@ -15,6 +15,7 @@

static void wfx_rx_handle_ba(struct wfx_vif *wvif, struct ieee80211_mgmt *mgmt)
{
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
int params, tid;

if (wfx_api_older_than(wvif->wdev, 3, 6))
@@ -24,12 +25,12 @@ static void wfx_rx_handle_ba(struct wfx_vif *wvif, struct ieee80211_mgmt *mgmt)
case WLAN_ACTION_ADDBA_REQ:
params = le16_to_cpu(mgmt->u.action.u.addba_req.capab);
tid = (params & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
- ieee80211_start_rx_ba_session_offl(wvif->vif, mgmt->sa, tid);
+ ieee80211_start_rx_ba_session_offl(vif, mgmt->sa, tid);
break;
case WLAN_ACTION_DELBA:
params = le16_to_cpu(mgmt->u.action.u.delba.params);
tid = (params & IEEE80211_DELBA_PARAM_TID_MASK) >> 12;
- ieee80211_stop_rx_ba_session_offl(wvif->vif, mgmt->sa, tid);
+ ieee80211_stop_rx_ba_session_offl(vif, mgmt->sa, tid);
break;
}
}
diff --git a/drivers/net/wireless/silabs/wfx/data_tx.c b/drivers/net/wireless/silabs/wfx/data_tx.c
index e07381b2ff4d..6a5e52a96d18 100644
--- a/drivers/net/wireless/silabs/wfx/data_tx.c
+++ b/drivers/net/wireless/silabs/wfx/data_tx.c
@@ -212,11 +212,12 @@ static u8 wfx_tx_get_link_id(struct wfx_vif *wvif, struct ieee80211_sta *sta,
struct ieee80211_hdr *hdr)
{
struct wfx_sta_priv *sta_priv = sta ? (struct wfx_sta_priv *)&sta->drv_priv : NULL;
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
const u8 *da = ieee80211_get_DA(hdr);

if (sta_priv && sta_priv->link_id)
return sta_priv->link_id;
- if (wvif->vif->type != NL80211_IFTYPE_AP)
+ if (vif->type != NL80211_IFTYPE_AP)
return 0;
if (is_multicast_ether_addr(da))
return 0;
diff --git a/drivers/net/wireless/silabs/wfx/key.c b/drivers/net/wireless/silabs/wfx/key.c
index 8f23e8d42bd4..196d64ef68f3 100644
--- a/drivers/net/wireless/silabs/wfx/key.c
+++ b/drivers/net/wireless/silabs/wfx/key.c
@@ -156,6 +156,7 @@ static int wfx_add_key(struct wfx_vif *wvif, struct ieee80211_sta *sta,
struct wfx_dev *wdev = wvif->wdev;
int idx = wfx_alloc_key(wvif->wdev);
bool pairwise = key->flags & IEEE80211_KEY_FLAG_PAIRWISE;
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);

WARN(key->flags & IEEE80211_KEY_FLAG_PAIRWISE && !sta, "inconsistent data");
ieee80211_get_key_rx_seq(key, 0, &seq);
@@ -174,7 +175,7 @@ static int wfx_add_key(struct wfx_vif *wvif, struct ieee80211_sta *sta,
k.type = fill_tkip_pair(&k.key.tkip_pairwise_key, key, sta->addr);
else
k.type = fill_tkip_group(&k.key.tkip_group_key, key, &seq,
- wvif->vif->type);
+ vif->type);
} else if (key->cipher == WLAN_CIPHER_SUITE_CCMP) {
if (pairwise)
k.type = fill_ccmp_pair(&k.key.aes_pairwise_key, key, sta->addr);
@@ -224,4 +225,3 @@ int wfx_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, struct ieee80211_
mutex_unlock(&wvif->wdev->conf_mutex);
return ret;
}
-
diff --git a/drivers/net/wireless/silabs/wfx/queue.c b/drivers/net/wireless/silabs/wfx/queue.c
index 729825230db2..37f492e5d3be 100644
--- a/drivers/net/wireless/silabs/wfx/queue.c
+++ b/drivers/net/wireless/silabs/wfx/queue.c
@@ -205,9 +205,10 @@ unsigned int wfx_pending_get_pkt_us_delay(struct wfx_dev *wdev, struct sk_buff *

bool wfx_tx_queues_has_cab(struct wfx_vif *wvif)
{
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
int i;

- if (wvif->vif->type != NL80211_IFTYPE_AP)
+ if (vif->type != NL80211_IFTYPE_AP)
return false;
for (i = 0; i < IEEE80211_NUM_ACS; ++i)
/* Note: since only AP can have mcast frames in queue and only one vif can be AP,
diff --git a/drivers/net/wireless/silabs/wfx/scan.c b/drivers/net/wireless/silabs/wfx/scan.c
index 7f34f0d322f9..16f619ed22e0 100644
--- a/drivers/net/wireless/silabs/wfx/scan.c
+++ b/drivers/net/wireless/silabs/wfx/scan.c
@@ -23,9 +23,11 @@ static void wfx_ieee80211_scan_completed_compat(struct ieee80211_hw *hw, bool ab

static int update_probe_tmpl(struct wfx_vif *wvif, struct cfg80211_scan_request *req)
{
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
struct sk_buff *skb;

- skb = ieee80211_probereq_get(wvif->wdev->hw, wvif->vif->addr, NULL, 0, req->ie_len);
+ skb = ieee80211_probereq_get(wvif->wdev->hw, vif->addr, NULL, 0,
+ req->ie_len);
if (!skb)
return -ENOMEM;

@@ -37,8 +39,9 @@ static int update_probe_tmpl(struct wfx_vif *wvif, struct cfg80211_scan_request

static int send_scan_req(struct wfx_vif *wvif, struct cfg80211_scan_request *req, int start_idx)
{
- int i, ret;
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
struct ieee80211_channel *ch_start, *ch_cur;
+ int i, ret;

for (i = start_idx; i < req->n_channels; i++) {
ch_start = req->channels[start_idx];
@@ -75,8 +78,8 @@ static int send_scan_req(struct wfx_vif *wvif, struct cfg80211_scan_request *req
} else {
ret = wvif->scan_nb_chan_done;
}
- if (req->channels[start_idx]->max_power != wvif->vif->bss_conf.txpower)
- wfx_hif_set_output_power(wvif, wvif->vif->bss_conf.txpower);
+ if (req->channels[start_idx]->max_power != vif->bss_conf.txpower)
+ wfx_hif_set_output_power(wvif, vif->bss_conf.txpower);
wfx_tx_unlock(wvif->wdev);
return ret;
}
diff --git a/drivers/net/wireless/silabs/wfx/sta.c b/drivers/net/wireless/silabs/wfx/sta.c
index 3297d73c327a..040d1f9fb03a 100644
--- a/drivers/net/wireless/silabs/wfx/sta.c
+++ b/drivers/net/wireless/silabs/wfx/sta.c
@@ -101,6 +101,7 @@ void wfx_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
struct wfx_vif *wvif = NULL;
struct wfx_dev *wdev = hw->priv;
bool filter_bssid, filter_prbreq, filter_beacon;
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);

/* Notes:
* - Probe responses (FIF_BCN_PRBRESP_PROMISC) are never filtered
@@ -132,7 +133,7 @@ void wfx_configure_filter(struct ieee80211_hw *hw, unsigned int changed_flags,
filter_bssid = true;

/* In AP mode, chip can reply to probe request itself */
- if (*total_flags & FIF_PROBE_REQ && wvif->vif->type == NL80211_IFTYPE_AP) {
+ if (*total_flags & FIF_PROBE_REQ && vif->type == NL80211_IFTYPE_AP) {
dev_dbg(wdev->dev, "do not forward probe request in AP mode\n");
*total_flags &= ~FIF_PROBE_REQ;
}
@@ -152,19 +153,28 @@ static int wfx_get_ps_timeout(struct wfx_vif *wvif, bool *enable_ps)
{
struct ieee80211_channel *chan0 = NULL, *chan1 = NULL;
struct ieee80211_conf *conf = &wvif->wdev->hw->conf;
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);

- WARN(!wvif->vif->bss_conf.assoc && enable_ps,
+ WARN(!vif->bss_conf.assoc && enable_ps,
"enable_ps is reliable only if associated");
- if (wdev_to_wvif(wvif->wdev, 0))
- chan0 = wdev_to_wvif(wvif->wdev, 0)->vif->bss_conf.chandef.chan;
- if (wdev_to_wvif(wvif->wdev, 1))
- chan1 = wdev_to_wvif(wvif->wdev, 1)->vif->bss_conf.chandef.chan;
- if (chan0 && chan1 && wvif->vif->type != NL80211_IFTYPE_AP) {
+ if (wdev_to_wvif(wvif->wdev, 0)) {
+ struct wfx_vif *wvif_ch0 = wdev_to_wvif(wvif->wdev, 0);
+ struct ieee80211_vif *vif_ch0 = wvif_to_vif(wvif_ch0);
+
+ chan0 = vif_ch0->bss_conf.chandef.chan;
+ }
+ if (wdev_to_wvif(wvif->wdev, 1)) {
+ struct wfx_vif *wvif_ch1 = wdev_to_wvif(wvif->wdev, 1);
+ struct ieee80211_vif *vif_ch1 = wvif_to_vif(wvif_ch1);
+
+ chan1 = vif_ch1->bss_conf.chandef.chan;
+ }
+ if (chan0 && chan1 && vif->type != NL80211_IFTYPE_AP) {
if (chan0->hw_value == chan1->hw_value) {
/* It is useless to enable PS if channels are the same. */
if (enable_ps)
*enable_ps = false;
- if (wvif->vif->bss_conf.assoc && wvif->vif->bss_conf.ps)
+ if (vif->bss_conf.assoc && vif->bss_conf.ps)
dev_info(wvif->wdev->dev, "ignoring requested PS mode");
return -1;
}
@@ -177,8 +187,8 @@ static int wfx_get_ps_timeout(struct wfx_vif *wvif, bool *enable_ps)
return 30;
}
if (enable_ps)
- *enable_ps = wvif->vif->bss_conf.ps;
- if (wvif->vif->bss_conf.assoc && wvif->vif->bss_conf.ps)
+ *enable_ps = vif->bss_conf.ps;
+ if (vif->bss_conf.assoc && vif->bss_conf.ps)
return conf->dynamic_ps_timeout;
else
return -1;
@@ -186,10 +196,11 @@ static int wfx_get_ps_timeout(struct wfx_vif *wvif, bool *enable_ps)

int wfx_update_pm(struct wfx_vif *wvif)
{
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
int ps_timeout;
bool ps;

- if (!wvif->vif->bss_conf.assoc)
+ if (!vif->bss_conf.assoc)
return 0;
ps_timeout = wfx_get_ps_timeout(wvif, &ps);
if (!ps)
@@ -215,7 +226,8 @@ int wfx_conf_tx(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
mutex_lock(&wdev->conf_mutex);
assign_bit(queue, &wvif->uapsd_mask, params->uapsd);
wfx_hif_set_edca_queue_params(wvif, queue, params);
- if (wvif->vif->type == NL80211_IFTYPE_STATION && old_uapsd != wvif->uapsd_mask) {
+ if (vif->type == NL80211_IFTYPE_STATION &&
+ old_uapsd != wvif->uapsd_mask) {
wfx_hif_set_uapsd_info(wvif, wvif->uapsd_mask);
wfx_update_pm(wvif);
}
@@ -238,24 +250,26 @@ void wfx_event_report_rssi(struct wfx_vif *wvif, u8 raw_rcpi_rssi)
/* RSSI: signed Q8.0, RCPI: unsigned Q7.1
* RSSI = RCPI / 2 - 110
*/
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
int rcpi_rssi;
int cqm_evt;

rcpi_rssi = raw_rcpi_rssi / 2 - 110;
- if (rcpi_rssi <= wvif->vif->bss_conf.cqm_rssi_thold)
+ if (rcpi_rssi <= vif->bss_conf.cqm_rssi_thold)
cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW;
else
cqm_evt = NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH;
- ieee80211_cqm_rssi_notify(wvif->vif, cqm_evt, rcpi_rssi, GFP_KERNEL);
+ ieee80211_cqm_rssi_notify(vif, cqm_evt, rcpi_rssi, GFP_KERNEL);
}

static void wfx_beacon_loss_work(struct work_struct *work)
{
struct wfx_vif *wvif = container_of(to_delayed_work(work), struct wfx_vif,
beacon_loss_work);
- struct ieee80211_bss_conf *bss_conf = &wvif->vif->bss_conf;
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
+ struct ieee80211_bss_conf *bss_conf = &vif->bss_conf;

- ieee80211_beacon_loss(wvif->vif);
+ ieee80211_beacon_loss(vif);
schedule_delayed_work(to_delayed_work(work), msecs_to_jiffies(bss_conf->beacon_int));
}

@@ -321,15 +335,16 @@ int wfx_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif, struct ie

static int wfx_upload_ap_templates(struct wfx_vif *wvif)
{
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
struct sk_buff *skb;

- skb = ieee80211_beacon_get(wvif->wdev->hw, wvif->vif);
+ skb = ieee80211_beacon_get(wvif->wdev->hw, vif);
if (!skb)
return -ENOMEM;
wfx_hif_set_template_frame(wvif, skb, HIF_TMPLT_BCN, API_RATE_INDEX_B_1MBPS);
dev_kfree_skb(skb);

- skb = ieee80211_proberesp_get(wvif->wdev->hw, wvif->vif);
+ skb = ieee80211_proberesp_get(wvif->wdev->hw, vif);
if (!skb)
return -ENOMEM;
wfx_hif_set_template_frame(wvif, skb, HIF_TMPLT_PRBRES, API_RATE_INDEX_B_1MBPS);
@@ -339,7 +354,8 @@ static int wfx_upload_ap_templates(struct wfx_vif *wvif)

static void wfx_set_mfp_ap(struct wfx_vif *wvif)
{
- struct sk_buff *skb = ieee80211_beacon_get(wvif->wdev->hw, wvif->vif);
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
+ struct sk_buff *skb = ieee80211_beacon_get(wvif->wdev->hw, vif);
const int ieoffset = offsetof(struct ieee80211_mgmt, u.beacon.variable);
const u16 *ptr = (u16 *)cfg80211_find_ie(WLAN_EID_RSN, skb->data + ieoffset,
skb->len - ieoffset);
@@ -388,12 +404,13 @@ void wfx_stop_ap(struct ieee80211_hw *hw, struct ieee80211_vif *vif)

static void wfx_join(struct wfx_vif *wvif)
{
- int ret;
- struct ieee80211_bss_conf *conf = &wvif->vif->bss_conf;
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
+ struct ieee80211_bss_conf *conf = &vif->bss_conf;
struct cfg80211_bss *bss = NULL;
u8 ssid[IEEE80211_MAX_SSID_LEN];
const u8 *ssidie = NULL;
int ssidlen = 0;
+ int ret;

wfx_tx_lock_flush(wvif->wdev);

@@ -420,7 +437,7 @@ static void wfx_join(struct wfx_vif *wvif)
wvif->join_in_progress = true;
ret = wfx_hif_join(wvif, conf, wvif->channel, ssid, ssidlen);
if (ret) {
- ieee80211_connection_loss(wvif->vif);
+ ieee80211_connection_loss(vif);
wfx_reset(wvif);
} else {
/* Due to beacon filtering it is possible that the AP's beacon is not known for the
@@ -434,13 +451,14 @@ static void wfx_join(struct wfx_vif *wvif)

static void wfx_join_finalize(struct wfx_vif *wvif, struct ieee80211_bss_conf *info)
{
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
struct ieee80211_sta *sta = NULL;
int ampdu_density = 0;
bool greenfield = false;

rcu_read_lock(); /* protect sta */
if (info->bssid && !info->ibss_joined)
- sta = ieee80211_find_sta(wvif->vif, info->bssid);
+ sta = ieee80211_find_sta(vif, info->bssid);
if (sta && sta->deflink.ht_cap.ht_supported)
ampdu_density = sta->deflink.ht_cap.ampdu_density;
if (sta && sta->deflink.ht_cap.ht_supported &&
@@ -561,11 +579,13 @@ void wfx_bss_info_changed(struct ieee80211_hw *hw, struct ieee80211_vif *vif,

static int wfx_update_tim(struct wfx_vif *wvif)
{
+ struct ieee80211_vif *vif = wvif_to_vif(wvif);
struct sk_buff *skb;
u16 tim_offset, tim_length;
u8 *tim_ptr;

- skb = ieee80211_beacon_get_tim(wvif->wdev->hw, wvif->vif, &tim_offset, &tim_length);
+ skb = ieee80211_beacon_get_tim(wvif->wdev->hw, vif, &tim_offset,
+ &tim_length);
if (!skb)
return -ENOENT;
tim_ptr = skb->data + tim_offset;
@@ -707,8 +727,6 @@ int wfx_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
return -EOPNOTSUPP;
}

- /* FIXME: prefer use of container_of() to get vif */
- wvif->vif = vif;
wvif->wdev = wdev;

wvif->link_id_map = 1; /* link-id 0 is reserved for multicast */
@@ -767,7 +785,6 @@ void wfx_remove_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif)

cancel_delayed_work_sync(&wvif->beacon_loss_work);
wdev->vif[wvif->id] = NULL;
- wvif->vif = NULL;

mutex_unlock(&wdev->conf_mutex);

--
2.25.1