[PATCH 14/17] Add ps.c, ps.h

michael.nemanov
2024-05-21T17:19:31Z

From: Michael Nemanov <Michael.Nemanov@ti.com>

80211 power-save modes are handled automictically by HW but
can be overridden here.

Signed-off-by: Michael Nemanov <michael.nemanov@ti.com>
---
drivers/net/wireless/ti/cc33xx/ps.c | 117 ++++++++++++++++++++++++++++
drivers/net/wireless/ti/cc33xx/ps.h | 16 ++++
2 files changed, 133 insertions(+)
create mode 100644 drivers/net/wireless/ti/cc33xx/ps.c
create mode 100644 drivers/net/wireless/ti/cc33xx/ps.h

diff --git a/drivers/net/wireless/ti/cc33xx/ps.c b/drivers/net/wireless/ti/cc33xx/ps.c
new file mode 100644
index 000000000000..e708ef8d5f46
--- /dev/null
+++ b/drivers/net/wireless/ti/cc33xx/ps.c
@@ -0,0 +1,117 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2022-2024 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+#include "ps.h"
+#include "tx.h"
+#include "debug.h"
+
+int cc33xx_ps_set_mode(struct cc33xx *cc, struct cc33xx_vif *wlvif,
+ enum cc33xx_cmd_ps_mode_e mode)
+{
+ int ret;
+ u16 timeout = cc->conf.host_conf.conn.dynamic_ps_timeout;
+
+ switch (mode) {
+ case STATION_AUTO_PS_MODE:
+ case STATION_POWER_SAVE_MODE:
+ cc33xx_debug(DEBUG_PSM, "entering psm (mode=%d,timeout=%u)",
+ mode, timeout);
+
+ ret = cc33xx_cmd_ps_mode(cc, wlvif, mode, timeout);
+ if (ret < 0)
+ return ret;
+
+ set_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
+ break;
+
+ case STATION_ACTIVE_MODE:
+ cc33xx_debug(DEBUG_PSM, "leaving psm");
+
+ ret = cc33xx_cmd_ps_mode(cc, wlvif, mode, 0);
+ if (ret < 0)
+ return ret;
+
+ clear_bit(WLVIF_FLAG_IN_PS, &wlvif->flags);
+ break;
+
+ default:
+ cc33xx_warning("trying to set ps to unsupported mode %d", mode);
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static void cc33xx_ps_filter_frames(struct cc33xx *cc, u8 hlid)
+{
+ int i;
+ struct sk_buff *skb;
+ struct ieee80211_tx_info *info;
+ unsigned long flags;
+ int filtered[NUM_TX_QUEUES];
+ struct cc33xx_link *lnk = &cc->links[hlid];
+
+ /* filter all frames currently in the low level queues for this hlid */
+ for (i = 0; i < NUM_TX_QUEUES; i++) {
+ filtered[i] = 0;
+ while ((skb = skb_dequeue(&lnk->tx_queue[i]))) {
+ filtered[i]++;
+
+ if (WARN_ON(cc33xx_is_dummy_packet(cc, skb)))
+ continue;
+
+ info = IEEE80211_SKB_CB(skb);
+ info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
+ info->status.rates[0].idx = -1;
+ ieee80211_tx_status_ni(cc->hw, skb);
+ }
+ }
+
+ spin_lock_irqsave(&cc->cc_lock, flags);
+ for (i = 0; i < NUM_TX_QUEUES; i++) {
+ cc->tx_queue_count[i] -= filtered[i];
+ if (lnk->wlvif)
+ lnk->wlvif->tx_queue_count[i] -= filtered[i];
+ }
+
+ spin_unlock_irqrestore(&cc->cc_lock, flags);
+ cc33xx_handle_tx_low_watermark(cc);
+}
+
+void cc33xx_ps_link_start(struct cc33xx *cc, struct cc33xx_vif *wlvif,
+ u8 hlid, bool clean_queues)
+{
+ struct ieee80211_sta *sta;
+ struct ieee80211_vif *vif = cc33xx_wlvif_to_vif(wlvif);
+
+ if (WARN_ON_ONCE(wlvif->bss_type != BSS_TYPE_AP_BSS))
+ return;
+
+ if (!test_bit(hlid, wlvif->ap.sta_hlid_map) ||
+ test_bit(hlid, &cc->ap_ps_map))
+ return;
+
+ cc33xx_debug(DEBUG_PSM,
+ "start mac80211 PSM on hlid %d pkts %d clean_queues %d",
+ hlid, cc->links[hlid].allocated_pkts, clean_queues);
+
+ rcu_read_lock();
+ sta = ieee80211_find_sta(vif, cc->links[hlid].addr);
+ if (!sta) {
+ cc33xx_error("could not find sta %pM for starting ps",
+ cc->links[hlid].addr);
+ rcu_read_unlock();
+ return;
+ }
+
+ ieee80211_sta_ps_transition_ni(sta, true);
+ rcu_read_unlock();
+
+ /* do we want to filter all frames from this link's queues? */
+ if (clean_queues)
+ cc33xx_ps_filter_frames(cc, hlid);
+
+ __set_bit(hlid, &cc->ap_ps_map);
+}
diff --git a/drivers/net/wireless/ti/cc33xx/ps.h b/drivers/net/wireless/ti/cc33xx/ps.h
new file mode 100644
index 000000000000..47f65b684b52
--- /dev/null
+++ b/drivers/net/wireless/ti/cc33xx/ps.h
@@ -0,0 +1,16 @@
+/* SPDX-License-Identifier: GPL-2.0-only
+ *
+ * Copyright (C) 2022-2024 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+#ifndef __PS_H__
+#define __PS_H__
+
+#include "acx.h"
+
+int cc33xx_ps_set_mode(struct cc33xx *cc, struct cc33xx_vif *wlvif,
+ enum cc33xx_cmd_ps_mode_e mode);
+void cc33xx_ps_link_start(struct cc33xx *cc, struct cc33xx_vif *wlvif,
+ u8 hlid, bool clean_queues);
+
+#endif /* __PS_H__ */
--
2.25.1