bus: fsl-mc: dpio: add APIs for DPIO objects (2704aedb) · Commits · 戴 / test

drivers/staging/fsl-mc/bus/Kconfig

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		@@ -15,3 +15,13 @@ config FSL_MC_BUS
		architecture. The fsl-mc bus driver handles discovery of
		DPAA2 objects (which are represented as Linux devices) and
		binding objects to drivers.

		config FSL_MC_DPIO
		tristate "QorIQ DPAA2 DPIO driver"
		depends on FSL_MC_BUS
		help
		Driver for the DPAA2 DPIO object. A DPIO provides queue and
		buffer management facilities for software to interact with
		other DPAA2 objects. This driver does not expose the DPIO
		objects individually, but groups them under a service layer
		API.

drivers/staging/fsl-mc/bus/Makefile

+3 −0

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		@@ -18,3 +18,6 @@ mc-bus-driver-objs := fsl-mc-bus.o \
		irq-gic-v3-its-fsl-mc-msi.o \
		dpmcp.o \
		dpbp.o

		# MC DPIO driver
		obj-$(CONFIG_FSL_MC_DPIO) += dpio/

drivers/staging/fsl-mc/bus/dpio/Makefile

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		#
		# QorIQ DPAA2 DPIO driver
		#

		subdir-ccflags-y := -Werror

		obj-$(CONFIG_FSL_MC_DPIO) += fsl-mc-dpio.o

		fsl-mc-dpio-objs := dpio.o

drivers/staging/fsl-mc/bus/dpio/dpio-cmd.h

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+75 −0

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		/*
		* Copyright 2013-2016 Freescale Semiconductor Inc.
		* Copyright 2016 NXP
		*
		* 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_DPIO_CMD_H
		#define _FSL_DPIO_CMD_H

		/* DPIO Version */
		#define DPIO_VER_MAJOR 4
		#define DPIO_VER_MINOR 2

		/* Command Versioning */

		#define DPIO_CMD_ID_OFFSET 4
		#define DPIO_CMD_BASE_VERSION 1

		#define DPIO_CMD(id) (((id) << DPIO_CMD_ID_OFFSET) \| DPIO_CMD_BASE_VERSION)

		/* Command IDs */
		#define DPIO_CMDID_CLOSE DPIO_CMD(0x800)
		#define DPIO_CMDID_OPEN DPIO_CMD(0x803)
		#define DPIO_CMDID_GET_API_VERSION DPIO_CMD(0xa03)
		#define DPIO_CMDID_ENABLE DPIO_CMD(0x002)
		#define DPIO_CMDID_DISABLE DPIO_CMD(0x003)
		#define DPIO_CMDID_GET_ATTR DPIO_CMD(0x004)

		struct dpio_cmd_open {
		__le32 dpio_id;
		};

		#define DPIO_CHANNEL_MODE_MASK 0x3

		struct dpio_rsp_get_attr {
		/* cmd word 0 */
		__le32 id;
		__le16 qbman_portal_id;
		u8 num_priorities;
		u8 channel_mode;
		/* cmd word 1 */
		__le64 qbman_portal_ce_addr;
		/* cmd word 2 */
		__le64 qbman_portal_ci_addr;
		/* cmd word 3 */
		__le32 qbman_version;
		};

		#endif /* _FSL_DPIO_CMD_H */

drivers/staging/fsl-mc/bus/dpio/dpio.c

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Original line number	Diff line number	Diff line
		/*
		* Copyright 2013-2016 Freescale Semiconductor Inc.
		* Copyright 2016 NXP
		*
		* 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 "../../include/mc-sys.h"
		#include "../../include/mc-cmd.h"

		#include "dpio.h"
		#include "dpio-cmd.h"

		/*
		* Data Path I/O Portal API
		* Contains initialization APIs and runtime control APIs for DPIO
		*/

		/**
		* dpio_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_'
		* @dpio_id: DPIO 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 dpio_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 dpio_open(struct fsl_mc_io *mc_io,
		u32 cmd_flags,
		int dpio_id,
		u16 *token)
		{
		struct mc_command cmd = { 0 };
		struct dpio_cmd_open *dpio_cmd;
		int err;

		/* prepare command */
		cmd.header = mc_encode_cmd_header(DPIO_CMDID_OPEN,
		cmd_flags,
		0);
		dpio_cmd = (struct dpio_cmd_open *)cmd.params;
		dpio_cmd->dpio_id = cpu_to_le32(dpio_id);

		err = mc_send_command(mc_io, &cmd);
		if (err)
		return err;

		/* retrieve response parameters */
		*token = mc_cmd_hdr_read_token(&cmd);

		return 0;
		}

		/**
		* dpio_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 DPIO object
		*
		* Return: '0' on Success; Error code otherwise.
		*/
		int dpio_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(DPIO_CMDID_CLOSE,
		cmd_flags,
		token);

		return mc_send_command(mc_io, &cmd);
		}

		/**
		* dpio_enable() - Enable the DPIO, allow I/O portal operations.
		* @mc_io: Pointer to MC portal's I/O object
		* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
		* @token: Token of DPIO object
		*
		* Return: '0' on Success; Error code otherwise
		*/
		int dpio_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(DPIO_CMDID_ENABLE,
		cmd_flags,
		token);

		return mc_send_command(mc_io, &cmd);
		}

		/**
		* dpio_disable() - Disable the DPIO, stop any I/O portal operation.
		* @mc_io: Pointer to MC portal's I/O object
		* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
		* @token: Token of DPIO object
		*
		* Return: '0' on Success; Error code otherwise
		*/
		int dpio_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(DPIO_CMDID_DISABLE,
		cmd_flags,
		token);

		return mc_send_command(mc_io, &cmd);
		}

		/**
		* dpio_get_attributes() - Retrieve DPIO 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 DPIO object
		* @attr: Returned object's attributes
		*
		* Return: '0' on Success; Error code otherwise
		*/
		int dpio_get_attributes(struct fsl_mc_io *mc_io,
		u32 cmd_flags,
		u16 token,
		struct dpio_attr *attr)
		{
		struct mc_command cmd = { 0 };
		struct dpio_rsp_get_attr *dpio_rsp;
		int err;

		/* prepare command */
		cmd.header = mc_encode_cmd_header(DPIO_CMDID_GET_ATTR,
		cmd_flags,
		token);

		err = mc_send_command(mc_io, &cmd);
		if (err)
		return err;

		/* retrieve response parameters */
		dpio_rsp = (struct dpio_rsp_get_attr *)cmd.params;
		attr->id = le32_to_cpu(dpio_rsp->id);
		attr->qbman_portal_id = le16_to_cpu(dpio_rsp->qbman_portal_id);
		attr->num_priorities = dpio_rsp->num_priorities;
		attr->channel_mode = dpio_rsp->channel_mode & DPIO_CHANNEL_MODE_MASK;
		attr->qbman_portal_ce_offset =
		le64_to_cpu(dpio_rsp->qbman_portal_ce_addr);
		attr->qbman_portal_ci_offset =
		le64_to_cpu(dpio_rsp->qbman_portal_ci_addr);
		attr->qbman_version = le32_to_cpu(dpio_rsp->qbman_version);

		return 0;
		}

		/**
		* dpio_get_api_version - Get Data Path I/O API version
		* @mc_io: Pointer to MC portal's DPIO object
		* @cmd_flags: Command flags; one or more of 'MC_CMD_FLAG_'
		* @major_ver: Major version of DPIO API
		* @minor_ver: Minor version of DPIO API
		*
		* Return: '0' on Success; Error code otherwise
		*/
		int dpio_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(DPIO_CMDID_GET_API_VERSION,
		cmd_flags, 0);

		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;
		}

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