From: Ioana Radulescu <ruxandra.radulescu@nxp.com>
To: <linux-kernel@vger.kernel.org>
Subject: [RESEND PATCH] bus: fsl-mc: add DPCON object APIs
Date: Mon, 5 Dec 2016 10:48:39 -0600
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From: Ioana Radulescu <ruxandra.radulescu@nxp.com>

This patch adds the command building/parsing wrapper functions
for the DPCON object. The binary interface version is v3.2.

Signed-off-by: Ioana Radulescu <ruxandra.radulescu@nxp.com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com>
---
This patch depends on the following patch series:
[PATCH v3 0/9] staging: fsl-mc: move bus driver out of staging, add dpio
https://www.spinics.net/lists/kernel/msg2396338.html

 drivers/bus/fsl-mc/Makefile    |    3 +-
 drivers/bus/fsl-mc/dpcon-cmd.h |   70 ++++++---
 drivers/bus/fsl-mc/dpcon.c     |  317 ++++++++++++++++++++++++++++++++++++++++
 include/linux/fsl/dpcon.h      |  115 +++++++++++++++
 4 files changed, 481 insertions(+), 24 deletions(-)
 create mode 100644 drivers/bus/fsl-mc/dpcon.c
 create mode 100644 include/linux/fsl/dpcon.h

diff --git a/drivers/bus/fsl-mc/Makefile b/drivers/bus/fsl-mc/Makefile
index d18df72..8ad0e9a 100644
--- a/drivers/bus/fsl-mc/Makefile
+++ b/drivers/bus/fsl-mc/Makefile
@@ -16,7 +16,8 @@ mc-bus-driver-objs := fsl-mc-bus.o \
 		      fsl-mc-allocator.o \
 		      fsl-mc-msi.o \
 		      dpmcp.o \
-		      dpbp.o
+		      dpbp.o \
+		      dpcon.o
 
 # MC DPIO driver
 obj-$(CONFIG_FSL_MC_DPIO) += dpio/
diff --git a/drivers/bus/fsl-mc/dpcon-cmd.h b/drivers/bus/fsl-mc/dpcon-cmd.h
index d0a5e19..d1c4668 100644
--- a/drivers/bus/fsl-mc/dpcon-cmd.h
+++ b/drivers/bus/fsl-mc/dpcon-cmd.h
@@ -33,30 +33,54 @@
 #define _FSL_DPCON_CMD_H
 
 /* DPCON Version */
-#define DPCON_VER_MAJOR				2
-#define DPCON_VER_MINOR				1
+#define DPCON_VER_MAJOR				3
+#define DPCON_VER_MINOR				2
+
+
+/* Command versioning */
+#define DPCON_CMD_BASE_VERSION			1
+#define DPCON_CMD_ID_OFFSET			4
+
+#define DPCON_CMD(id)	(((id) << DPCON_CMD_ID_OFFSET) | DPCON_CMD_BASE_VERSION)
 
 /* Command IDs */
-#define DPCON_CMDID_CLOSE				0x800
-#define DPCON_CMDID_OPEN				0x808
-#define DPCON_CMDID_CREATE				0x908
-#define DPCON_CMDID_DESTROY				0x900
-
-#define DPCON_CMDID_ENABLE				0x002
-#define DPCON_CMDID_DISABLE				0x003
-#define DPCON_CMDID_GET_ATTR				0x004
-#define DPCON_CMDID_RESET				0x005
-#define DPCON_CMDID_IS_ENABLED				0x006
-
-#define DPCON_CMDID_SET_IRQ				0x010
-#define DPCON_CMDID_GET_IRQ				0x011
-#define DPCON_CMDID_SET_IRQ_ENABLE			0x012
-#define DPCON_CMDID_GET_IRQ_ENABLE			0x013
-#define DPCON_CMDID_SET_IRQ_MASK			0x014
-#define DPCON_CMDID_GET_IRQ_MASK			0x015
-#define DPCON_CMDID_GET_IRQ_STATUS			0x016
-#define DPCON_CMDID_CLEAR_IRQ_STATUS			0x017
-
-#define DPCON_CMDID_SET_NOTIFICATION			0x100
+#define DPCON_CMDID_CLOSE			DPCON_CMD(0x800)
+#define DPCON_CMDID_OPEN			DPCON_CMD(0x808)
+#define DPCON_CMDID_GET_API_VERSION		DPCON_CMD(0xa08)
+
+#define DPCON_CMDID_ENABLE			DPCON_CMD(0x002)
+#define DPCON_CMDID_DISABLE			DPCON_CMD(0x003)
+#define DPCON_CMDID_GET_ATTR			DPCON_CMD(0x004)
+#define DPCON_CMDID_RESET			DPCON_CMD(0x005)
+#define DPCON_CMDID_IS_ENABLED			DPCON_CMD(0x006)
+
+#define DPCON_CMDID_SET_NOTIFICATION		DPCON_CMD(0x100)
+
+struct dpcon_cmd_open {
+	__le32 dpcon_id;
+};
+
+#define DPCON_ENABLE			1
+
+struct dpcon_rsp_is_enabled {
+	u8 enabled;
+};
+
+struct dpcon_rsp_get_attr {
+	/* response word 0 */
+	__le32 id;
+	__le16 qbman_ch_id;
+	u8 num_priorities;
+	u8 pad;
+};
+
+struct dpcon_cmd_set_notification {
+	/* cmd word 0 */
+	__le32 dpio_id;
+	u8 priority;
+	u8 pad[3];
+	/* cmd word 1 */
+	__le64 user_ctx;
+};
 
 #endif /* _FSL_DPCON_CMD_H */
diff --git a/drivers/bus/fsl-mc/dpcon.c b/drivers/bus/fsl-mc/dpcon.c
new file mode 100644
index 0000000..f1b33b3
--- /dev/null
+++ b/drivers/bus/fsl-mc/dpcon.c
@@ -0,0 +1,317 @@
+/* Copyright 2013-2016 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the above-listed copyright holders nor the
+ * names of any contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#include <linux/fsl/mc-sys.h>
+#include <linux/fsl/mc-cmd.h>
+#include <linux/fsl/dpcon.h>
+
+#include "dpcon-cmd.h"
+
+/**
+ * dpcon_open() - Open a control session for the specified object
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @dpcon_id:	DPCON unique ID
+ * @token:	Returned token; use in subsequent API calls
+ *
+ * This function can be used to open a control session for an
+ * already created object; an object may have been declared in
+ * the DPL or by calling the dpcon_create() function.
+ * This function returns a unique authentication token,
+ * associated with the specific object ID and the specific MC
+ * portal; this token must be used in all subsequent commands for
+ * this specific object.
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpcon_open(struct fsl_mc_io *mc_io,
+	       u32 cmd_flags,
+	       int dpcon_id,
+	       u16 *token)
+{
+	struct mc_command cmd = { 0 };
+	struct dpcon_cmd_open *dpcon_cmd;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_OPEN,
+					  cmd_flags,
+					  0);
+	dpcon_cmd = (struct dpcon_cmd_open *)cmd.params;
+	dpcon_cmd->dpcon_id = cpu_to_le32(dpcon_id);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	*token = mc_cmd_hdr_read_token(&cmd);
+
+	return 0;
+}
+EXPORT_SYMBOL(dpcon_open);
+
+/**
+ * dpcon_close() - Close the control session of the object
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ *
+ * After this function is called, no further operations are
+ * allowed on the object without opening a new control session.
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpcon_close(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token)
+{
+	struct mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_CLOSE,
+					  cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL(dpcon_close);
+
+/**
+ * dpcon_enable() - Enable the DPCON
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ *
+ * Return:	'0' on Success; Error code otherwise
+ */
+int dpcon_enable(struct fsl_mc_io *mc_io,
+		 u32 cmd_flags,
+		 u16 token)
+{
+	struct mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_ENABLE,
+					  cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL(dpcon_enable);
+
+/**
+ * dpcon_disable() - Disable the DPCON
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ *
+ * Return:	'0' on Success; Error code otherwise
+ */
+int dpcon_disable(struct fsl_mc_io *mc_io,
+		  u32 cmd_flags,
+		  u16 token)
+{
+	struct mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_DISABLE,
+					  cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL(dpcon_disable);
+
+/**
+ * dpcon_is_enabled() -	Check if the DPCON is enabled.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ * @en:		Returns '1' if object is enabled; '0' otherwise
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpcon_is_enabled(struct fsl_mc_io *mc_io,
+		     u32 cmd_flags,
+		     u16 token,
+		     int *en)
+{
+	struct mc_command cmd = { 0 };
+	struct dpcon_rsp_is_enabled *dpcon_rsp;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_IS_ENABLED,
+					  cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	dpcon_rsp = (struct dpcon_rsp_is_enabled *)cmd.params;
+	*en = dpcon_rsp->enabled & DPCON_ENABLE;
+
+	return 0;
+}
+EXPORT_SYMBOL(dpcon_is_enabled);
+
+/**
+ * dpcon_reset() - Reset the DPCON, returns the object to initial state.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpcon_reset(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token)
+{
+	struct mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_RESET,
+					  cmd_flags, token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL(dpcon_reset);
+
+/**
+ * dpcon_get_attributes() - Retrieve DPCON attributes.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ * @attr:	Object's attributes
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpcon_get_attributes(struct fsl_mc_io *mc_io,
+			 u32 cmd_flags,
+			 u16 token,
+			 struct dpcon_attr *attr)
+{
+	struct mc_command cmd = { 0 };
+	struct dpcon_rsp_get_attr *dpcon_rsp;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_GET_ATTR,
+					  cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	dpcon_rsp = (struct dpcon_rsp_get_attr *)cmd.params;
+	attr->id = le32_to_cpu(dpcon_rsp->id);
+	attr->qbman_ch_id = le16_to_cpu(dpcon_rsp->qbman_ch_id);
+	attr->num_priorities = dpcon_rsp->num_priorities;
+
+	return 0;
+}
+EXPORT_SYMBOL(dpcon_get_attributes);
+
+/**
+ * dpcon_set_notification() - Set DPCON notification destination
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ * @cfg:	Notification parameters
+ *
+ * Return:	'0' on Success; Error code otherwise
+ */
+int dpcon_set_notification(struct fsl_mc_io *mc_io,
+			   u32 cmd_flags,
+			   u16 token,
+			   struct dpcon_notification_cfg *cfg)
+{
+	struct mc_command cmd = { 0 };
+	struct dpcon_cmd_set_notification *dpcon_cmd;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_SET_NOTIFICATION,
+					  cmd_flags,
+					  token);
+	dpcon_cmd = (struct dpcon_cmd_set_notification *)cmd.params;
+	dpcon_cmd->dpio_id = cpu_to_le32(cfg->dpio_id);
+	dpcon_cmd->priority = cfg->priority;
+	dpcon_cmd->user_ctx = cpu_to_le64(cfg->user_ctx);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL(dpcon_set_notification);
+
+/**
+ * dpcon_get_api_version - Get Data Path Concentrator API version
+ * @mc_io:	Pointer to MC portal's DPCON object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @major_ver:	Major version of DPCON API
+ * @minor_ver:	Minor version of DPCON API
+ *
+ * Return:	'0' on Success; Error code otherwise
+ */
+int dpcon_get_api_version(struct fsl_mc_io *mc_io,
+			  u32 cmd_flags,
+			  u16 *major_ver,
+			  u16 *minor_ver)
+{
+	struct mc_command cmd = { 0 };
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_GET_API_VERSION,
+					  cmd_flags, 0);
+
+	/* send command to mc */
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	mc_cmd_read_api_version(&cmd, major_ver, minor_ver);
+
+	return 0;
+}
+EXPORT_SYMBOL(dpcon_get_api_version);
diff --git a/include/linux/fsl/dpcon.h b/include/linux/fsl/dpcon.h
new file mode 100644
index 0000000..efa2390
--- /dev/null
+++ b/include/linux/fsl/dpcon.h
@@ -0,0 +1,115 @@
+/* Copyright 2013-2016 Freescale Semiconductor Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the above-listed copyright holders nor the
+ * names of any contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ *
+ * ALTERNATIVELY, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") as published by the Free Software
+ * Foundation, either version 2 of that License or (at your option) any
+ * later version.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+#ifndef __FSL_DPCON_H
+#define __FSL_DPCON_H
+
+/* Data Path Concentrator API
+ * Contains initialization APIs and runtime control APIs for DPCON
+ */
+
+struct fsl_mc_io;
+
+/** General DPCON macros */
+
+/**
+ * Use it to disable notifications; see dpcon_set_notification()
+ */
+#define DPCON_INVALID_DPIO_ID		(int)(-1)
+
+int dpcon_open(struct fsl_mc_io *mc_io,
+	       u32 cmd_flags,
+	       int dpcon_id,
+	       u16 *token);
+
+int dpcon_close(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token);
+
+int dpcon_enable(struct fsl_mc_io *mc_io,
+		 u32 cmd_flags,
+		 u16 token);
+
+int dpcon_disable(struct fsl_mc_io *mc_io,
+		  u32 cmd_flags,
+		  u16 token);
+
+int dpcon_is_enabled(struct fsl_mc_io *mc_io,
+		     u32 cmd_flags,
+		     u16 token,
+		     int *en);
+
+int dpcon_reset(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token);
+
+/**
+ * struct dpcon_attr - Structure representing DPCON attributes
+ * @id: DPCON object ID
+ * @qbman_ch_id: Channel ID to be used by dequeue operation
+ * @num_priorities: Number of priorities for the DPCON channel (1-8)
+ */
+struct dpcon_attr {
+	int id;
+	u16 qbman_ch_id;
+	u8 num_priorities;
+};
+
+int dpcon_get_attributes(struct fsl_mc_io *mc_io,
+			 u32 cmd_flags,
+			 u16 token,
+			 struct dpcon_attr *attr);
+
+/**
+ * struct dpcon_notification_cfg - Structure representing notification params
+ * @dpio_id:	DPIO object ID; must be configured with a notification channel;
+ *	to disable notifications set it to 'DPCON_INVALID_DPIO_ID';
+ * @priority:	Priority selection within the DPIO channel; valid values
+ *		are 0-7, depending on the number of priorities in that channel
+ * @user_ctx:	User context value provided with each CDAN message
+ */
+struct dpcon_notification_cfg {
+	int dpio_id;
+	u8 priority;
+	u64 user_ctx;
+};
+
+int dpcon_set_notification(struct fsl_mc_io *mc_io,
+			   u32 cmd_flags,
+			   u16 token,
+			   struct dpcon_notification_cfg *cfg);
+
+int dpcon_get_api_version(struct fsl_mc_io *mc_io,
+			  u32 cmd_flags,
+			  u16 *major_ver,
+			  u16 *minor_ver);
+
+#endif /* __FSL_DPCON_H */
-- 
1.7.3.4