Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 96 insertions, 0 deletions

diff --git a/drivers/net/wireless/intel/iwlwifi/fw/notif-wait.h b/drivers/net/wireless/intel/iwlwifi/fw/notif-wait.h
new file mode 100644
index 000000000..49e8ba11b
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/fw/notif-wait.h
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
+/*
+ * Copyright (C) 2005-2014 Intel Corporation
+ * Copyright (C) 2015-2017 Intel Deutschland GmbH
+ */
+#ifndef __iwl_notif_wait_h__
+#define __iwl_notif_wait_h__
+
+#include <linux/wait.h>
+
+#include "iwl-trans.h"
+
+struct iwl_notif_wait_data {
+	struct list_head notif_waits;
+	spinlock_t notif_wait_lock;
+	wait_queue_head_t notif_waitq;
+};
+
+#define MAX_NOTIF_CMDS	5
+
+/**
+ * struct iwl_notification_wait - notification wait entry
+ * @list: list head for global list
+ * @fn: Function called with the notification. If the function
+ *	returns true, the wait is over, if it returns false then
+ *	the waiter stays blocked. If no function is given, any
+ *	of the listed commands will unblock the waiter.
+ * @cmds: command IDs
+ * @n_cmds: number of command IDs
+ * @triggered: waiter should be woken up
+ * @aborted: wait was aborted
+ *
+ * This structure is not used directly, to wait for a
+ * notification declare it on the stack, and call
+ * iwl_init_notification_wait() with appropriate
+ * parameters. Then do whatever will cause the ucode
+ * to notify the driver, and to wait for that then
+ * call iwl_wait_notification().
+ *
+ * Each notification is one-shot. If at some point we
+ * need to support multi-shot notifications (which
+ * can't be allocated on the stack) we need to modify
+ * the code for them.
+ */
+struct iwl_notification_wait {
+	struct list_head list;
+
+	bool (*fn)(struct iwl_notif_wait_data *notif_data,
+		   struct iwl_rx_packet *pkt, void *data);
+	void *fn_data;
+
+	u16 cmds[MAX_NOTIF_CMDS];
+	u8 n_cmds;
+	bool triggered, aborted;
+};
+
+
+/* caller functions */
+void iwl_notification_wait_init(struct iwl_notif_wait_data *notif_data);
+bool iwl_notification_wait(struct iwl_notif_wait_data *notif_data,
+			   struct iwl_rx_packet *pkt);
+void iwl_abort_notification_waits(struct iwl_notif_wait_data *notif_data);
+
+static inline void
+iwl_notification_notify(struct iwl_notif_wait_data *notif_data)
+{
+	wake_up_all(&notif_data->notif_waitq);
+}
+
+static inline void
+iwl_notification_wait_notify(struct iwl_notif_wait_data *notif_data,
+			     struct iwl_rx_packet *pkt)
+{
+	if (iwl_notification_wait(notif_data, pkt))
+		iwl_notification_notify(notif_data);
+}
+
+/* user functions */
+void __acquires(wait_entry)
+iwl_init_notification_wait(struct iwl_notif_wait_data *notif_data,
+			   struct iwl_notification_wait *wait_entry,
+			   const u16 *cmds, int n_cmds,
+			   bool (*fn)(struct iwl_notif_wait_data *notif_data,
+				      struct iwl_rx_packet *pkt, void *data),
+			   void *fn_data);
+
+int __must_check __releases(wait_entry)
+iwl_wait_notification(struct iwl_notif_wait_data *notif_data,
+		      struct iwl_notification_wait *wait_entry,
+		      unsigned long timeout);
+
+void __releases(wait_entry)
+iwl_remove_notification(struct iwl_notif_wait_data *notif_data,
+			struct iwl_notification_wait *wait_entry);
+
+#endif /* __iwl_notif_wait_h__ */