wlan: Add vendor event to get the driver hang reason
Add Vendor Event to get the driver hang reason indicating to the
user space that the driver has detected an internal failure.
This event carries the information indicating the reason that triggered
this detection.
CRs-Fixed: 2184455
Change-Id: Icb8900d96431bd249fea213a4043897e7f7b0195
diff --git a/CORE/HDD/src/wlan_hdd_cfg80211.c b/CORE/HDD/src/wlan_hdd_cfg80211.c
index 5297661..55df656 100644
--- a/CORE/HDD/src/wlan_hdd_cfg80211.c
+++ b/CORE/HDD/src/wlan_hdd_cfg80211.c
@@ -652,6 +652,101 @@
#endif /* FEATURE_WLAN_CH_AVOID */
/*
+ * define short names for the global vendor params
+ * used by QCA_NL80211_VENDOR_SUBCMD_HANG
+ */
+#define HANG_REASON_INDEX QCA_NL80211_VENDOR_SUBCMD_HANG_REASON_INDEX
+
+/**
+ * hdd_convert_hang_reason() - Convert cds recovery reason to vendor specific
+ * hang reason
+ * @reason: cds recovery reason
+ *
+ * Return: Vendor specific reason code
+ */
+static enum qca_wlan_vendor_hang_reason
+hdd_convert_hang_reason(enum vos_hang_reason reason)
+{
+ unsigned int ret_val;
+
+ switch (reason) {
+ case VOS_GET_MSG_BUFF_FAILURE:
+ ret_val = QCA_WLAN_HANG_GET_MSG_BUFF_FAILURE;
+ break;
+ case VOS_ACTIVE_LIST_TIMEOUT:
+ ret_val = QCA_WLAN_HANG_ACTIVE_LIST_TIMEOUT;
+ break;
+ case VOS_SCAN_REQ_EXPIRED:
+ ret_val = QCA_WLAN_HANG_SCAN_REQ_EXPIRED;
+ break;
+ case VOS_TRANSMISSIONS_TIMEOUT:
+ ret_val = QCA_WLAN_HANG_TRANSMISSIONS_TIMEOUT;
+ break;
+ case VOS_DXE_FAILURE:
+ ret_val = QCA_WLAN_HANG_DXE_FAILURE;
+ break;
+ case VOS_WDI_FAILURE:
+ ret_val = QCA_WLAN_HANG_WDI_FAILURE;
+ break;
+ case VOS_REASON_UNSPECIFIED:
+ default:
+ ret_val = QCA_WLAN_HANG_REASON_UNSPECIFIED;
+ }
+ return ret_val;
+}
+
+/**
+ * wlan_hdd_send_hang_reason_event() - Send hang reason to the userspace
+ * @hdd_ctx: Pointer to hdd context
+ * @reason: cds recovery reason
+ *
+ * Return: 0 on success or failure reason
+ */
+int wlan_hdd_send_hang_reason_event(hdd_context_t *hdd_ctx,
+ enum vos_hang_reason reason)
+{
+ struct sk_buff *vendor_event;
+ enum qca_wlan_vendor_hang_reason hang_reason;
+
+ ENTER();
+
+ if (!hdd_ctx) {
+ VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
+ "HDD context is null");
+ return -EINVAL;
+ }
+
+ vendor_event = cfg80211_vendor_event_alloc(hdd_ctx->wiphy,
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3, 18, 0))
+ NULL,
+#endif
+ sizeof(unsigned int),
+ HANG_REASON_INDEX,
+ GFP_KERNEL);
+ if (!vendor_event) {
+ VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
+ "cfg80211_vendor_event_alloc failed");
+ return -ENOMEM;
+ }
+
+ hang_reason = hdd_convert_hang_reason(reason);
+
+ if (nla_put_u32(vendor_event, QCA_WLAN_VENDOR_ATTR_HANG_REASON,
+ (unsigned int) hang_reason)) {
+ VOS_TRACE(VOS_MODULE_ID_HDD, VOS_TRACE_LEVEL_ERROR,
+ "QCA_WLAN_VENDOR_ATTR_HANG_REASON put fail");
+ kfree_skb(vendor_event);
+ return -EINVAL;
+ }
+
+ cfg80211_vendor_event(vendor_event, GFP_KERNEL);
+
+ EXIT();
+ return 0;
+}
+#undef HANG_REASON_INDEX
+
+/*
* FUNCTION: __wlan_hdd_cfg80211_nan_request
* This is called when wlan driver needs to send vendor specific
* nan request event.
@@ -8763,6 +8858,10 @@
.vendor_id = QCA_NL80211_VENDOR_ID,
.subcmd = QCA_NL80211_VENDOR_SUBCMD_NUD_STATS_GET,
},
+ [QCA_NL80211_VENDOR_SUBCMD_HANG_REASON_INDEX] = {
+ .vendor_id = QCA_NL80211_VENDOR_ID,
+ .subcmd = QCA_NL80211_VENDOR_SUBCMD_HANG,
+ },
};
/*
@@ -14825,7 +14924,7 @@
else
{
hddLog(LOGE, FL("Triggering SSR"));
- vos_wlanRestart();
+ vos_wlanRestart(VOS_SCAN_REQ_EXPIRED);
}
}
}