470 lines
12 KiB
C
470 lines
12 KiB
C
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/*
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* Copyright (c) 2014,2017 Qualcomm Atheros, Inc.
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* Copyright (c) 2018, The Linux Foundation. All rights reserved.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "wil6210.h"
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#include <linux/jiffies.h>
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#include <linux/pm_runtime.h>
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#define WIL6210_AUTOSUSPEND_DELAY_MS (1000)
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static void wil_pm_wake_connected_net_queues(struct wil6210_priv *wil)
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{
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int i;
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mutex_lock(&wil->vif_mutex);
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for (i = 0; i < wil->max_vifs; i++) {
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struct wil6210_vif *vif = wil->vifs[i];
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if (vif && test_bit(wil_vif_fwconnected, vif->status))
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wil_update_net_queues_bh(wil, vif, NULL, false);
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}
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mutex_unlock(&wil->vif_mutex);
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}
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static void wil_pm_stop_all_net_queues(struct wil6210_priv *wil)
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{
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int i;
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mutex_lock(&wil->vif_mutex);
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for (i = 0; i < wil->max_vifs; i++) {
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struct wil6210_vif *vif = wil->vifs[i];
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if (vif)
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wil_update_net_queues_bh(wil, vif, NULL, true);
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}
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mutex_unlock(&wil->vif_mutex);
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}
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static bool
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wil_can_suspend_vif(struct wil6210_priv *wil, struct wil6210_vif *vif,
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bool is_runtime)
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{
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struct wireless_dev *wdev = vif_to_wdev(vif);
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switch (wdev->iftype) {
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case NL80211_IFTYPE_MONITOR:
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wil_dbg_pm(wil, "Sniffer\n");
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return false;
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/* for STA-like interface, don't runtime suspend */
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case NL80211_IFTYPE_STATION:
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case NL80211_IFTYPE_P2P_CLIENT:
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if (test_bit(wil_vif_fwconnecting, vif->status)) {
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wil_dbg_pm(wil, "Delay suspend when connecting\n");
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return false;
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}
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if (is_runtime) {
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wil_dbg_pm(wil, "STA-like interface\n");
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return false;
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}
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break;
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/* AP-like interface - can't suspend */
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default:
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wil_dbg_pm(wil, "AP-like interface\n");
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return false;
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}
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return true;
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}
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int wil_can_suspend(struct wil6210_priv *wil, bool is_runtime)
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{
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int rc = 0, i;
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bool wmi_only = test_bit(WMI_FW_CAPABILITY_WMI_ONLY,
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wil->fw_capabilities);
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bool active_ifaces;
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wil_dbg_pm(wil, "can_suspend: %s\n", is_runtime ? "runtime" : "system");
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if (wmi_only || debug_fw) {
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wil_dbg_pm(wil, "Deny any suspend - %s mode\n",
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wmi_only ? "wmi_only" : "debug_fw");
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rc = -EBUSY;
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goto out;
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}
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if (is_runtime && !wil->platform_ops.suspend) {
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rc = -EBUSY;
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goto out;
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}
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mutex_lock(&wil->vif_mutex);
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active_ifaces = wil_has_active_ifaces(wil, true, false);
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mutex_unlock(&wil->vif_mutex);
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if (!active_ifaces) {
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/* can always sleep when down */
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wil_dbg_pm(wil, "Interface is down\n");
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goto out;
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}
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if (test_bit(wil_status_resetting, wil->status)) {
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wil_dbg_pm(wil, "Delay suspend when resetting\n");
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rc = -EBUSY;
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goto out;
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}
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if (wil->recovery_state != fw_recovery_idle) {
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wil_dbg_pm(wil, "Delay suspend during recovery\n");
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rc = -EBUSY;
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goto out;
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}
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/* interface is running */
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mutex_lock(&wil->vif_mutex);
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for (i = 0; i < wil->max_vifs; i++) {
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struct wil6210_vif *vif = wil->vifs[i];
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if (!vif)
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continue;
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if (!wil_can_suspend_vif(wil, vif, is_runtime)) {
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rc = -EBUSY;
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mutex_unlock(&wil->vif_mutex);
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goto out;
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}
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}
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mutex_unlock(&wil->vif_mutex);
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out:
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wil_dbg_pm(wil, "can_suspend: %s => %s (%d)\n",
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is_runtime ? "runtime" : "system", rc ? "No" : "Yes", rc);
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if (rc)
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wil->suspend_stats.rejected_by_host++;
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return rc;
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}
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static int wil_resume_keep_radio_on(struct wil6210_priv *wil)
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{
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int rc = 0;
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/* wil_status_resuming will be cleared when getting
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* WMI_TRAFFIC_RESUME_EVENTID
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*/
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set_bit(wil_status_resuming, wil->status);
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clear_bit(wil_status_suspended, wil->status);
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wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
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wil_unmask_irq(wil);
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wil6210_bus_request(wil, wil->bus_request_kbps_pre_suspend);
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/* Send WMI resume request to the device */
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rc = wmi_resume(wil);
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if (rc) {
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wil_err(wil, "device failed to resume (%d)\n", rc);
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if (no_fw_recovery)
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goto out;
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rc = wil_down(wil);
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if (rc) {
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wil_err(wil, "wil_down failed (%d)\n", rc);
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goto out;
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}
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rc = wil_up(wil);
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if (rc) {
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wil_err(wil, "wil_up failed (%d)\n", rc);
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goto out;
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}
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}
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/* Wake all queues */
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wil_pm_wake_connected_net_queues(wil);
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out:
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if (rc)
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set_bit(wil_status_suspended, wil->status);
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return rc;
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}
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static int wil_suspend_keep_radio_on(struct wil6210_priv *wil)
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{
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int rc = 0;
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unsigned long start, data_comp_to;
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wil_dbg_pm(wil, "suspend keep radio on\n");
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/* Prevent handling of new tx and wmi commands */
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set_bit(wil_status_suspending, wil->status);
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if (test_bit(wil_status_collecting_dumps, wil->status)) {
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/* Device collects crash dump, cancel the suspend */
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wil_dbg_pm(wil, "reject suspend while collecting crash dump\n");
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clear_bit(wil_status_suspending, wil->status);
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wil->suspend_stats.rejected_by_host++;
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return -EBUSY;
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}
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wil_pm_stop_all_net_queues(wil);
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if (!wil_is_tx_idle(wil)) {
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wil_dbg_pm(wil, "Pending TX data, reject suspend\n");
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wil->suspend_stats.rejected_by_host++;
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goto reject_suspend;
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}
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if (!wil->txrx_ops.is_rx_idle(wil)) {
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wil_dbg_pm(wil, "Pending RX data, reject suspend\n");
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wil->suspend_stats.rejected_by_host++;
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goto reject_suspend;
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}
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if (!wil_is_wmi_idle(wil)) {
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wil_dbg_pm(wil, "Pending WMI events, reject suspend\n");
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wil->suspend_stats.rejected_by_host++;
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goto reject_suspend;
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}
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/* Send WMI suspend request to the device */
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rc = wmi_suspend(wil);
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if (rc) {
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wil_dbg_pm(wil, "wmi_suspend failed, reject suspend (%d)\n",
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rc);
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goto reject_suspend;
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}
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/* Wait for completion of the pending RX packets */
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start = jiffies;
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data_comp_to = jiffies + msecs_to_jiffies(WIL_DATA_COMPLETION_TO_MS);
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if (test_bit(wil_status_napi_en, wil->status)) {
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while (!wil->txrx_ops.is_rx_idle(wil)) {
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if (time_after(jiffies, data_comp_to)) {
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if (wil->txrx_ops.is_rx_idle(wil))
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break;
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wil_err(wil,
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"TO waiting for idle RX, suspend failed\n");
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wil->suspend_stats.r_on.failed_suspends++;
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goto resume_after_fail;
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}
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wil_dbg_ratelimited(wil, "rx vring is not empty -> NAPI\n");
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napi_synchronize(&wil->napi_rx);
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msleep(20);
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}
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}
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/* In case of pending WMI events, reject the suspend
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* and resume the device.
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* This can happen if the device sent the WMI events before
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* approving the suspend.
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*/
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if (!wil_is_wmi_idle(wil)) {
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wil_err(wil, "suspend failed due to pending WMI events\n");
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wil->suspend_stats.r_on.failed_suspends++;
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goto resume_after_fail;
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}
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wil_mask_irq(wil);
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/* Disable device reset on PERST */
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wil_s(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
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if (wil->platform_ops.suspend) {
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rc = wil->platform_ops.suspend(wil->platform_handle, true);
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if (rc) {
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wil_err(wil, "platform device failed to suspend (%d)\n",
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rc);
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wil->suspend_stats.r_on.failed_suspends++;
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wil_c(wil, RGF_USER_CLKS_CTL_0, BIT_USER_CLKS_RST_PWGD);
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wil_unmask_irq(wil);
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goto resume_after_fail;
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}
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}
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/* Save the current bus request to return to the same in resume */
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wil->bus_request_kbps_pre_suspend = wil->bus_request_kbps;
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wil6210_bus_request(wil, 0);
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set_bit(wil_status_suspended, wil->status);
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clear_bit(wil_status_suspending, wil->status);
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return rc;
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resume_after_fail:
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set_bit(wil_status_resuming, wil->status);
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clear_bit(wil_status_suspending, wil->status);
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rc = wmi_resume(wil);
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/* if resume succeeded, reject the suspend */
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if (!rc) {
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rc = -EBUSY;
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wil_pm_wake_connected_net_queues(wil);
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}
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return rc;
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reject_suspend:
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clear_bit(wil_status_suspending, wil->status);
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wil_pm_wake_connected_net_queues(wil);
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return -EBUSY;
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}
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static int wil_suspend_radio_off(struct wil6210_priv *wil)
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{
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int rc = 0;
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bool active_ifaces;
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wil_dbg_pm(wil, "suspend radio off\n");
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set_bit(wil_status_suspending, wil->status);
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if (test_bit(wil_status_collecting_dumps, wil->status)) {
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/* Device collects crash dump, cancel the suspend */
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wil_dbg_pm(wil, "reject suspend while collecting crash dump\n");
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clear_bit(wil_status_suspending, wil->status);
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wil->suspend_stats.rejected_by_host++;
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return -EBUSY;
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}
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/* if netif up, hardware is alive, shut it down */
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mutex_lock(&wil->vif_mutex);
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active_ifaces = wil_has_active_ifaces(wil, true, false);
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mutex_unlock(&wil->vif_mutex);
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if (active_ifaces) {
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rc = wil_down(wil);
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if (rc) {
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wil_err(wil, "wil_down : %d\n", rc);
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wil->suspend_stats.r_off.failed_suspends++;
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goto out;
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}
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}
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/* Disable PCIe IRQ to prevent sporadic IRQs when PCIe is suspending */
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wil_dbg_pm(wil, "Disabling PCIe IRQ before suspending\n");
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wil_disable_irq(wil);
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if (wil->platform_ops.suspend) {
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rc = wil->platform_ops.suspend(wil->platform_handle, false);
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if (rc) {
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wil_enable_irq(wil);
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wil->suspend_stats.r_off.failed_suspends++;
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goto out;
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}
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}
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set_bit(wil_status_suspended, wil->status);
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out:
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clear_bit(wil_status_suspending, wil->status);
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wil_dbg_pm(wil, "suspend radio off: %d\n", rc);
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return rc;
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}
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static int wil_resume_radio_off(struct wil6210_priv *wil)
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{
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int rc = 0;
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bool active_ifaces;
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wil_dbg_pm(wil, "Enabling PCIe IRQ\n");
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wil_enable_irq(wil);
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|
/* if any netif up, bring hardware up
|
||
|
|
* During open(), IFF_UP set after actual device method
|
||
|
|
* invocation. This prevent recursive call to wil_up()
|
||
|
|
* wil_status_suspended will be cleared in wil_reset
|
||
|
|
*/
|
||
|
|
mutex_lock(&wil->vif_mutex);
|
||
|
|
active_ifaces = wil_has_active_ifaces(wil, true, false);
|
||
|
|
mutex_unlock(&wil->vif_mutex);
|
||
|
|
if (active_ifaces)
|
||
|
|
rc = wil_up(wil);
|
||
|
|
else
|
||
|
|
clear_bit(wil_status_suspended, wil->status);
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
int wil_suspend(struct wil6210_priv *wil, bool is_runtime, bool keep_radio_on)
|
||
|
|
{
|
||
|
|
int rc = 0;
|
||
|
|
|
||
|
|
wil_dbg_pm(wil, "suspend: %s\n", is_runtime ? "runtime" : "system");
|
||
|
|
|
||
|
|
if (test_bit(wil_status_suspended, wil->status)) {
|
||
|
|
wil_dbg_pm(wil, "trying to suspend while suspended\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!keep_radio_on)
|
||
|
|
rc = wil_suspend_radio_off(wil);
|
||
|
|
else
|
||
|
|
rc = wil_suspend_keep_radio_on(wil);
|
||
|
|
|
||
|
|
wil_dbg_pm(wil, "suspend: %s => %d\n",
|
||
|
|
is_runtime ? "runtime" : "system", rc);
|
||
|
|
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
int wil_resume(struct wil6210_priv *wil, bool is_runtime, bool keep_radio_on)
|
||
|
|
{
|
||
|
|
int rc = 0;
|
||
|
|
|
||
|
|
wil_dbg_pm(wil, "resume: %s\n", is_runtime ? "runtime" : "system");
|
||
|
|
|
||
|
|
if (wil->platform_ops.resume) {
|
||
|
|
rc = wil->platform_ops.resume(wil->platform_handle,
|
||
|
|
keep_radio_on);
|
||
|
|
if (rc) {
|
||
|
|
wil_err(wil, "platform_ops.resume : %d\n", rc);
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (keep_radio_on)
|
||
|
|
rc = wil_resume_keep_radio_on(wil);
|
||
|
|
else
|
||
|
|
rc = wil_resume_radio_off(wil);
|
||
|
|
|
||
|
|
out:
|
||
|
|
wil_dbg_pm(wil, "resume: %s => %d\n", is_runtime ? "runtime" : "system",
|
||
|
|
rc);
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
void wil_pm_runtime_allow(struct wil6210_priv *wil)
|
||
|
|
{
|
||
|
|
struct device *dev = wil_to_dev(wil);
|
||
|
|
|
||
|
|
pm_runtime_put_noidle(dev);
|
||
|
|
pm_runtime_set_autosuspend_delay(dev, WIL6210_AUTOSUSPEND_DELAY_MS);
|
||
|
|
pm_runtime_use_autosuspend(dev);
|
||
|
|
pm_runtime_allow(dev);
|
||
|
|
}
|
||
|
|
|
||
|
|
void wil_pm_runtime_forbid(struct wil6210_priv *wil)
|
||
|
|
{
|
||
|
|
struct device *dev = wil_to_dev(wil);
|
||
|
|
|
||
|
|
pm_runtime_forbid(dev);
|
||
|
|
pm_runtime_get_noresume(dev);
|
||
|
|
}
|
||
|
|
|
||
|
|
int wil_pm_runtime_get(struct wil6210_priv *wil)
|
||
|
|
{
|
||
|
|
int rc;
|
||
|
|
struct device *dev = wil_to_dev(wil);
|
||
|
|
|
||
|
|
rc = pm_runtime_get_sync(dev);
|
||
|
|
if (rc < 0) {
|
||
|
|
wil_err(wil, "pm_runtime_get_sync() failed, rc = %d\n", rc);
|
||
|
|
pm_runtime_put_noidle(dev);
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void wil_pm_runtime_put(struct wil6210_priv *wil)
|
||
|
|
{
|
||
|
|
struct device *dev = wil_to_dev(wil);
|
||
|
|
|
||
|
|
pm_runtime_mark_last_busy(dev);
|
||
|
|
pm_runtime_put_autosuspend(dev);
|
||
|
|
}
|