Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/linux/intel-ish-client-if.h b/include/linux/intel-ish-client-if.h
new file mode 100644
index 0000000..0d6b4bc
--- /dev/null
+++ b/include/linux/intel-ish-client-if.h
@@ -0,0 +1,113 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Intel ISH client Interface definitions
+ *
+ * Copyright (c) 2019, Intel Corporation.
+ */
+
+#ifndef _INTEL_ISH_CLIENT_IF_H_
+#define _INTEL_ISH_CLIENT_IF_H_
+
+struct ishtp_cl_device;
+struct ishtp_device;
+struct ishtp_cl;
+struct ishtp_fw_client;
+
+/* Client state */
+enum cl_state {
+	ISHTP_CL_INITIALIZING = 0,
+	ISHTP_CL_CONNECTING,
+	ISHTP_CL_CONNECTED,
+	ISHTP_CL_DISCONNECTING,
+	ISHTP_CL_DISCONNECTED
+};
+
+/**
+ * struct ishtp_cl_device - ISHTP device handle
+ * @driver:	driver instance on a bus
+ * @name:	Name of the device for probe
+ * @probe:	driver callback for device probe
+ * @remove:	driver callback on device removal
+ *
+ * Client drivers defines to get probed/removed for ISHTP client device.
+ */
+struct ishtp_cl_driver {
+	struct device_driver driver;
+	const char *name;
+	const guid_t *guid;
+	int (*probe)(struct ishtp_cl_device *dev);
+	int (*remove)(struct ishtp_cl_device *dev);
+	int (*reset)(struct ishtp_cl_device *dev);
+	const struct dev_pm_ops *pm;
+};
+
+/**
+ * struct ishtp_msg_data - ISHTP message data struct
+ * @size:	Size of data in the *data
+ * @data:	Pointer to data
+ */
+struct ishtp_msg_data {
+	uint32_t size;
+	unsigned char *data;
+};
+
+/*
+ * struct ishtp_cl_rb - request block structure
+ * @list:	Link to list members
+ * @cl:		ISHTP client instance
+ * @buffer:	message header
+ * @buf_idx:	Index into buffer
+ * @read_time:	 unused at this time
+ */
+struct ishtp_cl_rb {
+	struct list_head list;
+	struct ishtp_cl *cl;
+	struct ishtp_msg_data buffer;
+	unsigned long buf_idx;
+	unsigned long read_time;
+};
+
+int ishtp_cl_driver_register(struct ishtp_cl_driver *driver,
+			     struct module *owner);
+void ishtp_cl_driver_unregister(struct ishtp_cl_driver *driver);
+int ishtp_register_event_cb(struct ishtp_cl_device *device,
+			    void (*read_cb)(struct ishtp_cl_device *));
+
+/* Get the device * from ishtp device instance */
+struct device *ishtp_device(struct ishtp_cl_device *cl_device);
+/* Trace interface for clients */
+void *ishtp_trace_callback(struct ishtp_cl_device *cl_device);
+/* Get device pointer of PCI device for DMA acces */
+struct device *ishtp_get_pci_device(struct ishtp_cl_device *cl_device);
+
+struct ishtp_cl *ishtp_cl_allocate(struct ishtp_cl_device *cl_device);
+void ishtp_cl_free(struct ishtp_cl *cl);
+int ishtp_cl_link(struct ishtp_cl *cl);
+void ishtp_cl_unlink(struct ishtp_cl *cl);
+int ishtp_cl_disconnect(struct ishtp_cl *cl);
+int ishtp_cl_connect(struct ishtp_cl *cl);
+int ishtp_cl_send(struct ishtp_cl *cl, uint8_t *buf, size_t length);
+int ishtp_cl_flush_queues(struct ishtp_cl *cl);
+int ishtp_cl_io_rb_recycle(struct ishtp_cl_rb *rb);
+bool ishtp_cl_tx_empty(struct ishtp_cl *cl);
+struct ishtp_cl_rb *ishtp_cl_rx_get_rb(struct ishtp_cl *cl);
+void *ishtp_get_client_data(struct ishtp_cl *cl);
+void ishtp_set_client_data(struct ishtp_cl *cl, void *data);
+struct ishtp_device *ishtp_get_ishtp_device(struct ishtp_cl *cl);
+void ishtp_set_tx_ring_size(struct ishtp_cl *cl, int size);
+void ishtp_set_rx_ring_size(struct ishtp_cl *cl, int size);
+void ishtp_set_connection_state(struct ishtp_cl *cl, int state);
+void ishtp_cl_set_fw_client_id(struct ishtp_cl *cl, int fw_client_id);
+
+void ishtp_put_device(struct ishtp_cl_device *cl_dev);
+void ishtp_get_device(struct ishtp_cl_device *cl_dev);
+void ishtp_set_drvdata(struct ishtp_cl_device *cl_device, void *data);
+void *ishtp_get_drvdata(struct ishtp_cl_device *cl_device);
+struct ishtp_cl_device *ishtp_dev_to_cl_device(struct device *dev);
+int ishtp_register_event_cb(struct ishtp_cl_device *device,
+				void (*read_cb)(struct ishtp_cl_device *));
+struct	ishtp_fw_client *ishtp_fw_cl_get_client(struct ishtp_device *dev,
+						const guid_t *uuid);
+int ishtp_get_fw_client_id(struct ishtp_fw_client *fw_client);
+int ish_hw_reset(struct ishtp_device *dev);
+#endif /* _INTEL_ISH_CLIENT_IF_H_ */