ath10k: add WOW disconnect/magic-packet support

Add support for WOW disconnect and magic-packet.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

1 files changed, 276 insertions, 0 deletions

diff --git a/drivers/net/wireless/ath/ath10k/wow.c b/drivers/net/wireless/ath/ath10k/wow.c
new file mode 100644
index 000000000000..dc1b02580e79
--- /dev/null
+++ b/drivers/net/wireless/ath/ath10k/wow.c
@@ -0,0 +1,276 @@
+/*
+ * Copyright (c) 2015 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 "mac.h"
+
+#include <net/mac80211.h>
+#include "hif.h"
+#include "core.h"
+#include "debug.h"
+#include "wmi.h"
+#include "wmi-ops.h"
+
+static const struct wiphy_wowlan_support ath10k_wowlan_support = {
+        .flags = WIPHY_WOWLAN_DISCONNECT |
+                 WIPHY_WOWLAN_MAGIC_PKT,
+};
+
+static int ath10k_wow_vif_cleanup(struct ath10k_vif *arvif)
+{
+        struct ath10k *ar = arvif->ar;
+        int i, ret;
+
+        for (i = 0; i < WOW_EVENT_MAX; i++) {
+                ret = ath10k_wmi_wow_add_wakeup_event(ar, arvif->vdev_id, i, 0);
+                if (ret) {
+                        ath10k_warn(ar, "failed to issue wow wakeup for event %s on vdev %i: %d\n",
+                                    wow_wakeup_event(i), arvif->vdev_id, ret);
+                        return ret;
+                }
+        }
+
+        return 0;
+}
+
+static int ath10k_wow_cleanup(struct ath10k *ar)
+{
+        struct ath10k_vif *arvif;
+        int ret;
+
+        lockdep_assert_held(&ar->conf_mutex);
+
+        list_for_each_entry(arvif, &ar->arvifs, list) {
+                ret = ath10k_wow_vif_cleanup(arvif);
+                if (ret) {
+                        ath10k_warn(ar, "failed to clean wow wakeups on vdev %i: %d\n",
+                                    arvif->vdev_id, ret);
+                        return ret;
+                }
+        }
+
+        return 0;
+}
+
+static int ath10k_vif_wow_set_wakeups(struct ath10k_vif *arvif,
+                                      struct cfg80211_wowlan *wowlan)
+{
+        int ret, i;
+        unsigned long wow_mask = 0;
+        struct ath10k *ar = arvif->ar;
+
+        /* Setup requested WOW features */
+        switch (arvif->vdev_type) {
+        case WMI_VDEV_TYPE_IBSS:
+                __set_bit(WOW_BEACON_EVENT, &wow_mask);
+                 /* fall through */
+        case WMI_VDEV_TYPE_AP:
+                __set_bit(WOW_DEAUTH_RECVD_EVENT, &wow_mask);
+                __set_bit(WOW_DISASSOC_RECVD_EVENT, &wow_mask);
+                __set_bit(WOW_PROBE_REQ_WPS_IE_EVENT, &wow_mask);
+                __set_bit(WOW_AUTH_REQ_EVENT, &wow_mask);
+                __set_bit(WOW_ASSOC_REQ_EVENT, &wow_mask);
+                __set_bit(WOW_HTT_EVENT, &wow_mask);
+                __set_bit(WOW_RA_MATCH_EVENT, &wow_mask);
+                break;
+        case WMI_VDEV_TYPE_STA:
+                if (wowlan->disconnect) {
+                        __set_bit(WOW_DEAUTH_RECVD_EVENT, &wow_mask);
+                        __set_bit(WOW_DISASSOC_RECVD_EVENT, &wow_mask);
+                        __set_bit(WOW_BMISS_EVENT, &wow_mask);
+                        __set_bit(WOW_CSA_IE_EVENT, &wow_mask);
+                }
+
+                if (wowlan->magic_pkt)
+                        __set_bit(WOW_MAGIC_PKT_RECVD_EVENT, &wow_mask);
+                break;
+        default:
+                break;
+        }
+
+        for (i = 0; i < WOW_EVENT_MAX; i++) {
+                if (!test_bit(i, &wow_mask))
+                        continue;
+                ret = ath10k_wmi_wow_add_wakeup_event(ar, arvif->vdev_id, i, 1);
+                if (ret) {
+                        ath10k_warn(ar, "failed to enable wakeup event %s on vdev %i: %d\n",
+                                    wow_wakeup_event(i), arvif->vdev_id, ret);
+                        return ret;
+                }
+        }
+
+        return 0;
+}
+
+static int ath10k_wow_set_wakeups(struct ath10k *ar,
+                                  struct cfg80211_wowlan *wowlan)
+{
+        struct ath10k_vif *arvif;
+        int ret;
+
+        lockdep_assert_held(&ar->conf_mutex);
+
+        list_for_each_entry(arvif, &ar->arvifs, list) {
+                ret = ath10k_vif_wow_set_wakeups(arvif, wowlan);
+                if (ret) {
+                        ath10k_warn(ar, "failed to set wow wakeups on vdev %i: %d\n",
+                                    arvif->vdev_id, ret);
+                        return ret;
+                }
+        }
+
+        return 0;
+}
+
+static int ath10k_wow_enable(struct ath10k *ar)
+{
+        int ret;
+
+        lockdep_assert_held(&ar->conf_mutex);
+
+        reinit_completion(&ar->target_suspend);
+
+        ret = ath10k_wmi_wow_enable(ar);
+        if (ret) {
+                ath10k_warn(ar, "failed to issue wow enable: %d\n", ret);
+                return ret;
+        }
+
+        ret = wait_for_completion_timeout(&ar->target_suspend, 3 * HZ);
+        if (ret == 0) {
+                ath10k_warn(ar, "timed out while waiting for suspend completion\n");
+                return -ETIMEDOUT;
+        }
+
+        return 0;
+}
+
+static int ath10k_wow_wakeup(struct ath10k *ar)
+{
+        int ret;
+
+        lockdep_assert_held(&ar->conf_mutex);
+
+        reinit_completion(&ar->wow.wakeup_completed);
+
+        ret = ath10k_wmi_wow_host_wakeup_ind(ar);
+        if (ret) {
+                ath10k_warn(ar, "failed to send wow wakeup indication: %d\n",
+                            ret);
+                return ret;
+        }
+
+        ret = wait_for_completion_timeout(&ar->wow.wakeup_completed, 3 * HZ);
+        if (ret == 0) {
+                ath10k_warn(ar, "timed out while waiting for wow wakeup completion\n");
+                return -ETIMEDOUT;
+        }
+
+        return 0;
+}
+
+int ath10k_wow_op_suspend(struct ieee80211_hw *hw,
+                          struct cfg80211_wowlan *wowlan)
+{
+        struct ath10k *ar = hw->priv;
+        int ret;
+
+        mutex_lock(&ar->conf_mutex);
+
+        if (WARN_ON(!test_bit(ATH10K_FW_FEATURE_WOWLAN_SUPPORT,
+                              ar->fw_features))) {
+                ret = 1;
+                goto exit;
+        }
+
+        ret =  ath10k_wow_cleanup(ar);
+        if (ret) {
+                ath10k_warn(ar, "failed to clear wow wakeup events: %d\n",
+                            ret);
+                goto exit;
+        }
+
+        ret = ath10k_wow_set_wakeups(ar, wowlan);
+        if (ret) {
+                ath10k_warn(ar, "failed to set wow wakeup events: %d\n",
+                            ret);
+                goto cleanup;
+        }
+
+        ret = ath10k_wow_enable(ar);
+        if (ret) {
+                ath10k_warn(ar, "failed to start wow: %d\n", ret);
+                goto cleanup;
+        }
+
+        ret = ath10k_hif_suspend(ar);
+        if (ret) {
+                ath10k_warn(ar, "failed to suspend hif: %d\n", ret);
+                goto wakeup;
+        }
+
+        goto exit;
+
+wakeup:
+        ath10k_wow_wakeup(ar);
+
+cleanup:
+        ath10k_wow_cleanup(ar);
+
+exit:
+        mutex_unlock(&ar->conf_mutex);
+        return ret ? 1 : 0;
+}
+
+int ath10k_wow_op_resume(struct ieee80211_hw *hw)
+{
+        struct ath10k *ar = hw->priv;
+        int ret;
+
+        mutex_lock(&ar->conf_mutex);
+
+        if (WARN_ON(!test_bit(ATH10K_FW_FEATURE_WOWLAN_SUPPORT,
+                              ar->fw_features))) {
+                ret = 1;
+                goto exit;
+        }
+
+        ret = ath10k_hif_resume(ar);
+        if (ret) {
+                ath10k_warn(ar, "failed to resume hif: %d\n", ret);
+                goto exit;
+        }
+
+        ret = ath10k_wow_wakeup(ar);
+        if (ret)
+                ath10k_warn(ar, "failed to wakeup from wow: %d\n", ret);
+
+exit:
+        mutex_unlock(&ar->conf_mutex);
+        return ret ? 1 : 0;
+}
+
+int ath10k_wow_init(struct ath10k *ar)
+{
+        if (!test_bit(ATH10K_FW_FEATURE_WOWLAN_SUPPORT, ar->fw_features))
+                return 0;
+
+        if (WARN_ON(!test_bit(WMI_SERVICE_WOW, ar->wmi.svc_map)))
+                return -EINVAL;
+
+        ar->hw->wiphy->wowlan = &ath10k_wowlan_support;
+
+        return 0;
+}