msm: ipa: Add snapshot of IPA driver

This is a snapshot of the IPA and GSI drivers
from msm-4.19 to msm-lahaina as of
'commit <2df7c68f038d13a4d278ecd858bc5ccebb3f569b>
(Merge "sched/core: fix possible out-of-bounds
access in updown_migrate_value)'.

Change-Id: Ie654ca46181248854ddc33c3033b5808aa32e628
Signed-off-by: Bojun Pan <bojunp@codeaurora.org>

include/linux/rndis_ipa.h

@@ -0,0 +1,95 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2013-2019, The Linux Foundation. All rights reserved.
+ */
+
+#ifndef _RNDIS_IPA_H_
+#define _RNDIS_IPA_H_
+
+#include <linux/ipa.h>
+
+/*
+ * @priv: private data given upon ipa_connect
+ * @evt: event enum, should be IPA_WRITE_DONE
+ * @data: for tx path the data field is the sent socket buffer.
+ */
+typedef void (*ipa_callback)(void *priv,
+		enum ipa_dp_evt_type evt,
+		unsigned long data);
+
+/*
+ * struct ipa_usb_init_params - parameters for driver initialization API
+ *
+ * @device_ready_notify: callback supplied by USB core driver
+ * This callback shall be called by the Netdev once the device
+ * is ready to receive data from tethered PC.
+ * @ipa_rx_notify: The network driver will set this callback (out parameter).
+ * this callback shall be supplied for ipa_connect upon pipe
+ * connection (USB->IPA), once IPA driver receive data packets
+ * from USB pipe destined for Apps this callback will be called.
+ * @ipa_tx_notify: The network driver will set this callback (out parameter).
+ * this callback shall be supplied for ipa_connect upon pipe
+ * connection (IPA->USB), once IPA driver send packets destined
+ * for USB, IPA BAM will notify for Tx-complete.
+ * @host_ethaddr: host Ethernet address in network order
+ * @device_ethaddr: device Ethernet address in network order
+ * @private: The network driver will set this pointer (out parameter).
+ * This pointer will hold the network device for later interaction
+ * with between USB driver and the network driver.
+ * @skip_ep_cfg: boolean field that determines if Apps-processor
+ *  should or should not configure this end-point.
+ */
+struct ipa_usb_init_params {
+	void (*device_ready_notify)(void);
+	ipa_callback ipa_rx_notify;
+	ipa_callback ipa_tx_notify;
+	u8 host_ethaddr[ETH_ALEN];
+	u8 device_ethaddr[ETH_ALEN];
+	void *private;
+	bool skip_ep_cfg;
+};
+
+#ifdef CONFIG_RNDIS_IPA
+
+int rndis_ipa_init(struct ipa_usb_init_params *params);
+
+int rndis_ipa_pipe_connect_notify(u32 usb_to_ipa_hdl,
+			u32 ipa_to_usb_hdl,
+			u32 max_xfer_size_bytes_to_dev,
+			u32 max_packet_number_to_dev,
+			u32 max_xfer_size_bytes_to_host,
+			void *private);
+
+int rndis_ipa_pipe_disconnect_notify(void *private);
+
+void rndis_ipa_cleanup(void *private);
+
+#else /* CONFIG_RNDIS_IPA*/
+
+static inline int rndis_ipa_init(struct ipa_usb_init_params *params)
+{
+	return -ENOMEM;
+}
+
+static inline int rndis_ipa_pipe_connect_notify(u32 usb_to_ipa_hdl,
+			u32 ipa_to_usb_hdl,
+			u32 max_xfer_size_bytes_to_dev,
+			u32 max_packet_number_to_dev,
+			u32 max_xfer_size_bytes_to_host,
+			void *private)
+{
+	return -ENOMEM;
+}
+
+static inline int rndis_ipa_pipe_disconnect_notify(void *private)
+{
+	return -ENOMEM;
+}
+
+static inline void rndis_ipa_cleanup(void *private)
+{
+
+}
+#endif /* CONFIG_RNDIS_IPA */
+
+#endif /* _RNDIS_IPA_H_ */