Merge tag 'qcom-drivers-for-4.16' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/agross/linux into next/drivers

Pull "Qualcomm ARM Based Driver Updates for v4.16 - Redo" from Andy Gross:

* Fix error handling code in SMP2P probe
* Update SMP2P to use ACPS as mailbox client
* Add QMI support
* Fixups for Qualcomm SCM
* Fix licensing on rmtfs_mem
* Correct SMSM child node lookup
* Populate firmware nodes during platform init

* tag 'qcom-drivers-for-4.16' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/agross/linux:
  of: platform: populate /firmware/ node from of_platform_default_populate_init()
  soc: qcom: smp2p: Use common error handling code in qcom_smp2p_probe()
  soc: qcom: Introduce QMI helpers
  soc: qcom: Introduce QMI encoder/decoder
  firmware: qcom_scm: Add dependent headers to qcom_scm.h
  soc: qcom: smp2p: Access APCS as mailbox client
  soc: qcom: rmtfs_mem: add missing MODULE_DESCRIPTION/AUTHOR/LICENSE
  soc: qcom: smsm: fix child-node lookup
  firmware: qcom_scm: drop redandant of_platform_populate

1 files changed, 271 insertions, 0 deletions

diff --git a/include/linux/soc/qcom/qmi.h b/include/linux/soc/qcom/qmi.h
new file mode 100644
index 000000000000..f4de33654a60
--- /dev/null
+++ b/include/linux/soc/qcom/qmi.h
@@ -0,0 +1,271 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2017, Linaro Ltd.
+ */
+#ifndef __QMI_HELPERS_H__
+#define __QMI_HELPERS_H__
+
+#include <linux/completion.h>
+#include <linux/idr.h>
+#include <linux/list.h>
+#include <linux/qrtr.h>
+#include <linux/types.h>
+#include <linux/workqueue.h>
+
+struct socket;
+
+/**
+ * qmi_header - wireformat header of QMI messages
+ * @type:	type of message
+ * @txn_id:	transaction id
+ * @msg_id:	message id
+ * @msg_len:	length of message payload following header
+ */
+struct qmi_header {
+	u8 type;
+	u16 txn_id;
+	u16 msg_id;
+	u16 msg_len;
+} __packed;
+
+#define QMI_REQUEST	0
+#define QMI_RESPONSE	2
+#define QMI_INDICATION	4
+
+#define QMI_COMMON_TLV_TYPE 0
+
+enum qmi_elem_type {
+	QMI_EOTI,
+	QMI_OPT_FLAG,
+	QMI_DATA_LEN,
+	QMI_UNSIGNED_1_BYTE,
+	QMI_UNSIGNED_2_BYTE,
+	QMI_UNSIGNED_4_BYTE,
+	QMI_UNSIGNED_8_BYTE,
+	QMI_SIGNED_2_BYTE_ENUM,
+	QMI_SIGNED_4_BYTE_ENUM,
+	QMI_STRUCT,
+	QMI_STRING,
+};
+
+enum qmi_array_type {
+	NO_ARRAY,
+	STATIC_ARRAY,
+	VAR_LEN_ARRAY,
+};
+
+/**
+ * struct qmi_elem_info - describes how to encode a single QMI element
+ * @data_type:	Data type of this element.
+ * @elem_len:	Array length of this element, if an array.
+ * @elem_size:	Size of a single instance of this data type.
+ * @array_type:	Array type of this element.
+ * @tlv_type:	QMI message specific type to identify which element
+ *		is present in an incoming message.
+ * @offset:	Specifies the offset of the first instance of this
+ *		element in the data structure.
+ * @ei_array:	Null-terminated array of @qmi_elem_info to describe nested
+ *		structures.
+ */
+struct qmi_elem_info {
+	enum qmi_elem_type data_type;
+	u32 elem_len;
+	u32 elem_size;
+	enum qmi_array_type array_type;
+	u8 tlv_type;
+	u32 offset;
+	struct qmi_elem_info *ei_array;
+};
+
+#define QMI_RESULT_SUCCESS_V01			0
+#define QMI_RESULT_FAILURE_V01			1
+
+#define QMI_ERR_NONE_V01			0
+#define QMI_ERR_MALFORMED_MSG_V01		1
+#define QMI_ERR_NO_MEMORY_V01			2
+#define QMI_ERR_INTERNAL_V01			3
+#define QMI_ERR_CLIENT_IDS_EXHAUSTED_V01	5
+#define QMI_ERR_INVALID_ID_V01			41
+#define QMI_ERR_ENCODING_V01			58
+#define QMI_ERR_INCOMPATIBLE_STATE_V01		90
+#define QMI_ERR_NOT_SUPPORTED_V01		94
+
+/**
+ * qmi_response_type_v01 - common response header (decoded)
+ * @result:	result of the transaction
+ * @error:	error value, when @result is QMI_RESULT_FAILURE_V01
+ */
+struct qmi_response_type_v01 {
+	u16 result;
+	u16 error;
+};
+
+extern struct qmi_elem_info qmi_response_type_v01_ei[];
+
+/**
+ * struct qmi_service - context to track lookup-results
+ * @service:	service type
+ * @version:	version of the @service
+ * @instance:	instance id of the @service
+ * @node:	node of the service
+ * @port:	port of the service
+ * @priv:	handle for client's use
+ * @list_node:	list_head for house keeping
+ */
+struct qmi_service {
+	unsigned int service;
+	unsigned int version;
+	unsigned int instance;
+
+	unsigned int node;
+	unsigned int port;
+
+	void *priv;
+	struct list_head list_node;
+};
+
+struct qmi_handle;
+
+/**
+ * struct qmi_ops - callbacks for qmi_handle
+ * @new_server:		inform client of a new_server lookup-result, returning
+ *                      successfully from this call causes the library to call
+ *                      @del_server as the service is removed from the
+ *                      lookup-result. @priv of the qmi_service can be used by
+ *                      the client
+ * @del_server:		inform client of a del_server lookup-result
+ * @net_reset:		inform client that the name service was restarted and
+ *                      that and any state needs to be released
+ * @msg_handler:	invoked for incoming messages, allows a client to
+ *                      override the usual QMI message handler
+ * @bye:                inform a client that all clients from a node are gone
+ * @del_client:         inform a client that a particular client is gone
+ */
+struct qmi_ops {
+	int (*new_server)(struct qmi_handle *qmi, struct qmi_service *svc);
+	void (*del_server)(struct qmi_handle *qmi, struct qmi_service *svc);
+	void (*net_reset)(struct qmi_handle *qmi);
+	void (*msg_handler)(struct qmi_handle *qmi, struct sockaddr_qrtr *sq,
+			    const void *data, size_t count);
+	void (*bye)(struct qmi_handle *qmi, unsigned int node);
+	void (*del_client)(struct qmi_handle *qmi,
+			   unsigned int node, unsigned int port);
+};
+
+/**
+ * struct qmi_txn - transaction context
+ * @qmi:	QMI handle this transaction is associated with
+ * @id:		transaction id
+ * @lock:	for synchronization between handler and waiter of messages
+ * @completion:	completion object as the transaction receives a response
+ * @result:	result code for the completed transaction
+ * @ei:		description of the QMI encoded response (optional)
+ * @dest:	destination buffer to decode message into (optional)
+ */
+struct qmi_txn {
+	struct qmi_handle *qmi;
+
+	int id;
+
+	struct mutex lock;
+	struct completion completion;
+	int result;
+
+	struct qmi_elem_info *ei;
+	void *dest;
+};
+
+/**
+ * struct qmi_msg_handler - description of QMI message handler
+ * @type:	type of message
+ * @msg_id:	message id
+ * @ei:		description of the QMI encoded message
+ * @decoded_size:	size of the decoded object
+ * @fn:		function to invoke as the message is decoded
+ */
+struct qmi_msg_handler {
+	unsigned int type;
+	unsigned int msg_id;
+
+	struct qmi_elem_info *ei;
+
+	size_t decoded_size;
+	void (*fn)(struct qmi_handle *qmi, struct sockaddr_qrtr *sq,
+		   struct qmi_txn *txn, const void *decoded);
+};
+
+/**
+ * struct qmi_handle - QMI context
+ * @sock:	socket handle
+ * @sock_lock:	synchronization of @sock modifications
+ * @sq:		sockaddr of @sock
+ * @work:	work for handling incoming messages
+ * @wq:		workqueue to post @work on
+ * @recv_buf:	scratch buffer for handling incoming messages
+ * @recv_buf_size:	size of @recv_buf
+ * @lookups:		list of registered lookup requests
+ * @lookup_results:	list of lookup-results advertised to the client
+ * @services:		list of registered services (by this client)
+ * @ops:	reference to callbacks
+ * @txns:	outstanding transactions
+ * @txn_lock:	lock for modifications of @txns
+ * @handlers:	list of handlers for incoming messages
+ */
+struct qmi_handle {
+	struct socket *sock;
+	struct mutex sock_lock;
+
+	struct sockaddr_qrtr sq;
+
+	struct work_struct work;
+	struct workqueue_struct *wq;
+
+	void *recv_buf;
+	size_t recv_buf_size;
+
+	struct list_head lookups;
+	struct list_head lookup_results;
+	struct list_head services;
+
+	struct qmi_ops ops;
+
+	struct idr txns;
+	struct mutex txn_lock;
+
+	const struct qmi_msg_handler *handlers;
+};
+
+int qmi_add_lookup(struct qmi_handle *qmi, unsigned int service,
+		   unsigned int version, unsigned int instance);
+int qmi_add_server(struct qmi_handle *qmi, unsigned int service,
+		   unsigned int version, unsigned int instance);
+
+int qmi_handle_init(struct qmi_handle *qmi, size_t max_msg_len,
+		    const struct qmi_ops *ops,
+		    const struct qmi_msg_handler *handlers);
+void qmi_handle_release(struct qmi_handle *qmi);
+
+ssize_t qmi_send_request(struct qmi_handle *qmi, struct sockaddr_qrtr *sq,
+			 struct qmi_txn *txn, int msg_id, size_t len,
+			 struct qmi_elem_info *ei, const void *c_struct);
+ssize_t qmi_send_response(struct qmi_handle *qmi, struct sockaddr_qrtr *sq,
+			  struct qmi_txn *txn, int msg_id, size_t len,
+			  struct qmi_elem_info *ei, const void *c_struct);
+ssize_t qmi_send_indication(struct qmi_handle *qmi, struct sockaddr_qrtr *sq,
+			    int msg_id, size_t len, struct qmi_elem_info *ei,
+			    const void *c_struct);
+
+void *qmi_encode_message(int type, unsigned int msg_id, size_t *len,
+			 unsigned int txn_id, struct qmi_elem_info *ei,
+			 const void *c_struct);
+
+int qmi_decode_message(const void *buf, size_t len,
+		       struct qmi_elem_info *ei, void *c_struct);
+
+int qmi_txn_init(struct qmi_handle *qmi, struct qmi_txn *txn,
+		 struct qmi_elem_info *ei, void *c_struct);
+int qmi_txn_wait(struct qmi_txn *txn, unsigned long timeout);
+void qmi_txn_cancel(struct qmi_txn *txn);
+
+#endif