Date:   Fri, 14 Jun 2019 01:36:36 +0000
From:   Peng Ma <peng.ma@....com>
To:     "vkoul@...nel.org" <vkoul@...nel.org>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "dan.j.williams@...el.com" <dan.j.williams@...el.com>,
        Leo Li <leoyang.li@....com>
Subject: RE: [V4 1/2] dmaengine: fsl-dpaa2-qdma: Add the DPDMAI(Data Path DMA
 Interface) support

Hi Vkoul,

>+int dpdmai_set_rx_queue(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+			u16 token, u8 priority,
>+			const struct dpdmai_rx_queue_cfg *cfg) {
>+	struct fsl_mc_command cmd = { 0 };
>+	struct dpdmai_cmd_queue *cmd_params;
>+
>+	/* prepare command */
>+	cmd.header =
>mc_encode_cmd_header(DPDMAI_CMDID_SET_RX_QUEUE,
>+					  cmd_flags,
>+					  token);
>+
>+	cmd_params = (struct dpdmai_cmd_queue *)cmd.params;
The MC(Management Complex) has may objects like DPDMAI, DPNI, DPIO, DPCON etc.
They have the same size command structure defined by struct fsl_mc_command (include/linux/fsl/mc.h):
struct fsl_mc_command {
        __le64 header;
        __le64 params[7];
};
But different object and different operation(open , close, enable etc ) of object with different command params, when we used DPDMAI, 
the cmd_params should use cast to fit it. This makes it easy to program.

>+	cmd_params->dest_id = cpu_to_le32(cfg->dest_cfg.dest_id);
>+	cmd_params->priority = cfg->dest_cfg.priority;
>+	cmd_params->queue = priority;
>+	cmd_params->dest_type = cfg->dest_cfg.dest_type;
>+	cmd_params->user_ctx = cpu_to_le64(cfg->user_ctx);
>+	cmd_params->options = cpu_to_le32(cfg->options);
>+
>+	/* send command to mc*/
>+	return mc_send_command(mc_io, &cmd);
>+}

Best Regards,
Peng
>-----Original Message-----
>From: Peng Ma <peng.ma@....com>
>Sent: 2019年6月13日 18:14
>To: vkoul@...nel.org; dan.j.williams@...el.com; Leo Li <leoyang.li@....com>
>Cc: linux-kernel@...r.kernel.org; dmaengine@...r.kernel.org; Peng Ma
><peng.ma@....com>
>Subject: [V4 1/2] dmaengine: fsl-dpaa2-qdma: Add the DPDMAI(Data Path
>DMA Interface) support
>
>The MC(Management Complex) exports the DPDMAI(Data Path DMA Interface)
>object as an interface to operate the DPAA2(Data Path Acceleration
>Architecture 2) qDMA Engine. The DPDMAI enables sending frame-based
>requests to qDMA and receiving back confirmation response on transaction
>completion, utilizing the DPAA2 QBMan(Queue Manager and Buffer Manager
>hardware) infrastructure. DPDMAI object provides up to two priorities for
>processing qDMA requests.
>The following list summarizes the DPDMAI main features and capabilities:
>	1. Supports up to two scheduling priorities for processing
>	service requests.
>	- Each DPDMAI transmit queue is mapped to one of two service
>	priorities, allowing further prioritization in hardware between
>	requests from different DPDMAI objects.
>	2. Supports up to two receive queues for incoming transaction
>	completion confirmations.
>	- Each DPDMAI receive queue is mapped to one of two receive
>	priorities, allowing further prioritization between other
>	interfaces when associating the DPDMAI receive queues to DPIO
>	or DPCON(Data Path Concentrator) objects.
>	3. Supports different scheduling options for processing received
>	packets:
>	- Queues can be configured either in 'parked' mode (default),
>	oattached to a DPIO object, or attached to DPCON object.
>	4. Allows interaction with one or more DPIO objects for
>	dequeueing/enqueueing frame descriptors(FD) and for
>	acquiring/releasing buffers.
>	5. Supports enable, disable, and reset operations.
>
>Add dpdmai to support some platforms with dpaa2 qdma engine.
>
>Signed-off-by: Peng Ma <peng.ma@....com>
>---
>changed for v4:
>	- Delete dpdmai_cmd.h.
>	- Remove some useless functions.
>	- Clean up the format.
>	- Update Copyright.
>
> drivers/dma/fsl-dpaa2-qdma/dpdmai.c |  275
>++++++++++++++++++++++++++++++
>drivers/dma/fsl-dpaa2-qdma/dpdmai.h |  318
>+++++++++++++++++++++++++++++++++++
> 2 files changed, 593 insertions(+), 0 deletions(-)  create mode 100644
>drivers/dma/fsl-dpaa2-qdma/dpdmai.c
> create mode 100644 drivers/dma/fsl-dpaa2-qdma/dpdmai.h
>
>diff --git a/drivers/dma/fsl-dpaa2-qdma/dpdmai.c
>b/drivers/dma/fsl-dpaa2-qdma/dpdmai.c
>new file mode 100644
>index 0000000..4dba154
>--- /dev/null
>+++ b/drivers/dma/fsl-dpaa2-qdma/dpdmai.c
>@@ -0,0 +1,275 @@
>+// SPDX-License-Identifier: GPL-2.0
>+// Copyright 2019 NXP
>+
>+#include <linux/types.h>
>+#include <linux/io.h>
>+#include <linux/fsl/mc.h>
>+#include "dpdmai.h"
>+
>+struct dpdmai_cmd_open {
>+	__le32 dpdmai_id;
>+};
>+
>+struct dpdmai_rsp_get_attributes {
>+	__le32 id;
>+	u8 num_of_priorities;
>+	u8 pad0[3];
>+	__le16 major;
>+	__le16 minor;
>+};
>+
>+struct dpdmai_cmd_queue {
>+	__le32 dest_id;
>+	u8 priority;
>+	u8 queue;
>+	u8 dest_type;
>+	u8 pad;
>+	__le64 user_ctx;
>+	union {
>+		__le32 options;
>+		__le32 fqid;
>+	};
>+};
>+
>+struct dpdmai_rsp_get_tx_queue {
>+	__le64 pad;
>+	__le32 fqid;
>+};
>+
>+#define MC_CMD_OP(_cmd, _param, _offset, _width, _type, _arg) \
>+	((_cmd).params[_param] |= mc_enc((_offset), (_width), _arg))
>+
>+#define MC_CMD_HDR_READ_TOKEN(_hdr) \
>+	((u16)mc_dec((_hdr), MC_CMD_HDR_TOKEN_O,
>MC_CMD_HDR_TOKEN_S))
>+
>+/* cmd, param, offset, width, type, arg_name */ #define
>+DPDMAI_CMD_CREATE(_cmd, _cfg) \ do { \
>+	typeof(_cmd) (cmd) = (_cmd); \
>+	typeof(_cfg) (cfg) = (_cfg); \
>+	MC_CMD_OP(cmd, 0, 8,  8,  u8,  (cfg)->priorities[0]);\
>+	MC_CMD_OP(cmd, 0, 16, 8,  u8,  (cfg)->priorities[1]);\ } while (0)
>+
>+static inline u64 mc_enc(int lsoffset, int width, u64 val) {
>+	return (u64)(((u64)val & MAKE_UMASK64(width)) << lsoffset); }
>+
>+static inline u64 mc_dec(u64 val, int lsoffset, int width) {
>+	return (u64)((val >> lsoffset) & MAKE_UMASK64(width)); }
>+
>+int dpdmai_open(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+		int dpdmai_id, u16 *token)
>+{
>+	struct fsl_mc_command cmd = { 0 };
>+	struct dpdmai_cmd_open *cmd_params;
>+	int err;
>+
>+	/* prepare command */
>+	cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_OPEN,
>+					  cmd_flags, 0);
>+
>+	cmd_params = (struct dpdmai_cmd_open *)cmd.params;
>+	cmd_params->dpdmai_id = cpu_to_le32(dpdmai_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;
>+}
>+
>+int dpdmai_close(struct fsl_mc_io *mc_io, u32 cmd_flags, u16 token) {
>+	struct fsl_mc_command cmd = { 0 };
>+
>+	/* prepare command */
>+	cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_CLOSE,
>+					  cmd_flags, token);
>+
>+	/* send command to mc*/
>+	return mc_send_command(mc_io, &cmd);
>+}
>+
>+int dpdmai_create(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+		  const struct dpdmai_cfg *cfg, u16 *token) {
>+	struct fsl_mc_command cmd = { 0 };
>+	int err;
>+
>+	/* prepare command */
>+	cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_CREATE,
>+					  cmd_flags,
>+					  0);
>+	DPDMAI_CMD_CREATE(cmd, cfg);
>+
>+	/* 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.header);
>+
>+	return 0;
>+}
>+
>+int dpdmai_enable(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+		  u16 token)
>+{
>+	struct fsl_mc_command cmd = { 0 };
>+
>+	/* prepare command */
>+	cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_ENABLE,
>+					  cmd_flags,
>+					  token);
>+
>+	/* send command to mc*/
>+	return mc_send_command(mc_io, &cmd);
>+}
>+
>+int dpdmai_disable(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+		   u16 token)
>+{
>+	struct fsl_mc_command cmd = { 0 };
>+
>+	/* prepare command */
>+	cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_DISABLE,
>+					  cmd_flags,
>+					  token);
>+
>+	/* send command to mc*/
>+	return mc_send_command(mc_io, &cmd);
>+}
>+
>+int dpdmai_reset(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+		 u16 token)
>+{
>+	struct fsl_mc_command cmd = { 0 };
>+
>+	/* prepare command */
>+	cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_RESET,
>+					  cmd_flags,
>+					  token);
>+
>+	/* send command to mc*/
>+	return mc_send_command(mc_io, &cmd);
>+}
>+
>+int dpdmai_get_attributes(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+			  u16 token, struct dpdmai_attr *attr) {
>+	struct fsl_mc_command cmd = { 0 };
>+	int err;
>+	struct dpdmai_rsp_get_attributes *rsp_params;
>+
>+	/* prepare command */
>+	cmd.header = mc_encode_cmd_header(DPDMAI_CMDID_GET_ATTR,
>+					  cmd_flags,
>+					  token);
>+
>+	/* send command to mc*/
>+	err = mc_send_command(mc_io, &cmd);
>+	if (err)
>+		return err;
>+
>+	/* retrieve response parameters */
>+	rsp_params = (struct dpdmai_rsp_get_attributes *)cmd.params;
>+	attr->id = le32_to_cpu(rsp_params->id);
>+	attr->version.major = le16_to_cpu(rsp_params->major);
>+	attr->version.minor = le16_to_cpu(rsp_params->minor);
>+	attr->num_of_priorities = rsp_params->num_of_priorities;
>+
>+	return 0;
>+}
>+
>+int dpdmai_set_rx_queue(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+			u16 token, u8 priority,
>+			const struct dpdmai_rx_queue_cfg *cfg) {
>+	struct fsl_mc_command cmd = { 0 };
>+	struct dpdmai_cmd_queue *cmd_params;
>+
>+	/* prepare command */
>+	cmd.header =
>mc_encode_cmd_header(DPDMAI_CMDID_SET_RX_QUEUE,
>+					  cmd_flags,
>+					  token);
>+
>+	cmd_params = (struct dpdmai_cmd_queue *)cmd.params;
>+	cmd_params->dest_id = cpu_to_le32(cfg->dest_cfg.dest_id);
>+	cmd_params->priority = cfg->dest_cfg.priority;
>+	cmd_params->queue = priority;
>+	cmd_params->dest_type = cfg->dest_cfg.dest_type;
>+	cmd_params->user_ctx = cpu_to_le64(cfg->user_ctx);
>+	cmd_params->options = cpu_to_le32(cfg->options);
>+
>+	/* send command to mc*/
>+	return mc_send_command(mc_io, &cmd);
>+}
>+
>+int dpdmai_get_rx_queue(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+			u16 token, u8 priority,
>+			struct dpdmai_rx_queue_attr *attr)
>+{
>+	struct fsl_mc_command cmd = { 0 };
>+	struct dpdmai_cmd_queue *cmd_params;
>+	int err;
>+
>+	/* prepare command */
>+	cmd.header =
>mc_encode_cmd_header(DPDMAI_CMDID_GET_RX_QUEUE,
>+					  cmd_flags,
>+					  token);
>+
>+	cmd_params = (struct dpdmai_cmd_queue *)cmd.params;
>+	cmd_params->queue = priority;
>+
>+	/* send command to mc*/
>+	err = mc_send_command(mc_io, &cmd);
>+	if (err)
>+		return err;
>+
>+	/* retrieve response parameters */
>+	attr->dest_cfg.dest_id = le32_to_cpu(cmd_params->dest_id);
>+	attr->dest_cfg.priority = cmd_params->priority;
>+	attr->dest_cfg.dest_type = cmd_params->dest_type;
>+	attr->user_ctx = le64_to_cpu(cmd_params->user_ctx);
>+	attr->fqid = le32_to_cpu(cmd_params->fqid);
>+
>+	return 0;
>+}
>+
>+int dpdmai_get_tx_queue(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+			u16 token, u8 priority,
>+			struct dpdmai_tx_queue_attr *attr)
>+{
>+	struct fsl_mc_command cmd = { 0 };
>+	struct dpdmai_cmd_queue *cmd_params;
>+	struct dpdmai_rsp_get_tx_queue *rsp_params;
>+	int err;
>+
>+	/* prepare command */
>+	cmd.header =
>mc_encode_cmd_header(DPDMAI_CMDID_GET_TX_QUEUE,
>+					  cmd_flags,
>+					  token);
>+
>+	cmd_params = (struct dpdmai_cmd_queue *)cmd.params;
>+	cmd_params->queue = priority;
>+
>+	/* send command to mc*/
>+	err = mc_send_command(mc_io, &cmd);
>+	if (err)
>+		return err;
>+
>+	/* retrieve response parameters */
>+
>+	rsp_params = (struct dpdmai_rsp_get_tx_queue *)cmd.params;
>+	attr->fqid = le32_to_cpu(rsp_params->fqid);
>+
>+	return 0;
>+}
>diff --git a/drivers/dma/fsl-dpaa2-qdma/dpdmai.h
>b/drivers/dma/fsl-dpaa2-qdma/dpdmai.h
>new file mode 100644
>index 0000000..54d26bb
>--- /dev/null
>+++ b/drivers/dma/fsl-dpaa2-qdma/dpdmai.h
>@@ -0,0 +1,318 @@
>+/* SPDX-License-Identifier: GPL-2.0 */
>+/* Copyright 2019 NXP */
>+
>+#ifndef __FSL_DPDMAI_H
>+#define __FSL_DPDMAI_H
>+
>+/* DPDMAI Version */
>+#define DPDMAI_VER_MAJOR	2
>+#define DPDMAI_VER_MINOR	2
>+
>+#define DPDMAI_CMD_BASE_VERSION	0
>+#define DPDMAI_CMD_ID_OFFSET	4
>+
>+#define DPDMAI_CMDID_FORMAT(x)	(((x) << DPDMAI_CMD_ID_OFFSET)
>| \
>+				DPDMAI_CMD_BASE_VERSION)
>+
>+/* Command IDs */
>+#define DPDMAI_CMDID_CLOSE		DPDMAI_CMDID_FORMAT(0x800)
>+#define DPDMAI_CMDID_OPEN
>DPDMAI_CMDID_FORMAT(0x80E)
>+#define DPDMAI_CMDID_CREATE
>DPDMAI_CMDID_FORMAT(0x90E)
>+
>+#define DPDMAI_CMDID_ENABLE
>DPDMAI_CMDID_FORMAT(0x002)
>+#define DPDMAI_CMDID_DISABLE
>DPDMAI_CMDID_FORMAT(0x003)
>+#define DPDMAI_CMDID_GET_ATTR
>DPDMAI_CMDID_FORMAT(0x004)
>+#define DPDMAI_CMDID_RESET
>DPDMAI_CMDID_FORMAT(0x005)
>+#define DPDMAI_CMDID_IS_ENABLED
>DPDMAI_CMDID_FORMAT(0x006)
>+
>+#define DPDMAI_CMDID_SET_IRQ
>DPDMAI_CMDID_FORMAT(0x010)
>+#define DPDMAI_CMDID_GET_IRQ
>DPDMAI_CMDID_FORMAT(0x011)
>+#define DPDMAI_CMDID_SET_IRQ_ENABLE
>DPDMAI_CMDID_FORMAT(0x012)
>+#define DPDMAI_CMDID_GET_IRQ_ENABLE
>DPDMAI_CMDID_FORMAT(0x013)
>+#define DPDMAI_CMDID_SET_IRQ_MASK
>DPDMAI_CMDID_FORMAT(0x014)
>+#define DPDMAI_CMDID_GET_IRQ_MASK
>DPDMAI_CMDID_FORMAT(0x015)
>+#define DPDMAI_CMDID_GET_IRQ_STATUS
>DPDMAI_CMDID_FORMAT(0x016)
>+#define DPDMAI_CMDID_CLEAR_IRQ_STATUS
>	DPDMAI_CMDID_FORMAT(0x017)
>+
>+#define DPDMAI_CMDID_SET_RX_QUEUE
>	DPDMAI_CMDID_FORMAT(0x1A0)
>+#define DPDMAI_CMDID_GET_RX_QUEUE
>DPDMAI_CMDID_FORMAT(0x1A1)
>+#define DPDMAI_CMDID_GET_TX_QUEUE
>DPDMAI_CMDID_FORMAT(0x1A2)
>+
>+#define MC_CMD_HDR_TOKEN_O 32  /* Token field offset */ #define
>+MC_CMD_HDR_TOKEN_S 16  /* Token field size */
>+
>+#define MAKE_UMASK64(_width) \
>+	((u64)((_width) < 64 ? ((u64)1 << (_width)) - 1 : (u64)-1))
>+
>+/* Data Path DMA Interface API
>+ * Contains initialization APIs and runtime control APIs for DPDMAI  */
>+
>+/**
>+ * Maximum number of Tx/Rx priorities per DPDMAI object  */
>+#define DPDMAI_PRIO_NUM		2
>+
>+/* DPDMAI queue modification options */
>+
>+/**
>+ * Select to modify the user's context associated with the queue  */
>+#define DPDMAI_QUEUE_OPT_USER_CTX	0x1
>+
>+/**
>+ * Select to modify the queue's destination  */
>+#define DPDMAI_QUEUE_OPT_DEST		0x2
>+
>+/**
>+ * dpdmai_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_'
>+ * @dpdmai_id:	DPDMAI 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 dpdmai_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 dpdmai_open(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+		int dpdmai_id, u16 *token);
>+
>+/**
>+ * dpdmai_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 DPDMAI 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 dpdmai_close(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+		 u16 token);
>+
>+/**
>+ * struct dpdmai_cfg - Structure representing DPDMAI configuration
>+ * @priorities: Priorities for the DMA hardware processing; valid priorities are
>+ *	configured with values 1-8; the entry following last valid entry
>+ *	should be configured with 0
>+ */
>+struct dpdmai_cfg {
>+	u8 priorities[DPDMAI_PRIO_NUM];
>+};
>+
>+/**
>+ * dpdmai_create() - Create the DPDMAI object
>+ * @mc_io:	Pointer to MC portal's I/O object
>+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
>+ * @cfg:	Configuration structure
>+ * @token:	Returned token; use in subsequent API calls
>+ *
>+ * Create the DPDMAI object, allocate required resources and
>+ * perform required initialization.
>+ *
>+ * The object can be created either by declaring it in the
>+ * DPL file, or by calling this 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 calls to
>+ * this specific object. For objects that are created using the
>+ * DPL file, call dpdmai_open() function to get an authentication
>+ * token first.
>+ *
>+ * Return:	'0' on Success; Error code otherwise.
>+ */
>+int dpdmai_create(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+		  const struct dpdmai_cfg *cfg, u16 *token);
>+
>+/**
>+ * dpdmai_enable() - Enable the DPDMAI, allow sending and receiving frames.
>+ * @mc_io:	Pointer to MC portal's I/O object
>+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
>+ * @token:	Token of DPDMAI object
>+ *
>+ * Return:	'0' on Success; Error code otherwise.
>+ */
>+int dpdmai_enable(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+		  u16 token);
>+
>+/**
>+ * dpdmai_disable() - Disable the DPDMAI, stop sending and receiving frames.
>+ * @mc_io:	Pointer to MC portal's I/O object
>+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
>+ * @token:	Token of DPDMAI object
>+ *
>+ * Return:	'0' on Success; Error code otherwise.
>+ */
>+int dpdmai_disable(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+		   u16 token);
>+
>+/**
>+ * dpdmai_reset() - Reset the DPDMAI, 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 DPDMAI object
>+ *
>+ * Return:	'0' on Success; Error code otherwise.
>+ */
>+int dpdmai_reset(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+		 u16 token);
>+
>+/**
>+ * struct dpdmai_attr - Structure representing DPDMAI attributes
>+ * @id: DPDMAI object ID
>+ * @version: DPDMAI version
>+ * @num_of_priorities: number of priorities  */ struct dpdmai_attr {
>+	int	id;
>+	/**
>+	 * struct version - DPDMAI version
>+	 * @major: DPDMAI major version
>+	 * @minor: DPDMAI minor version
>+	 */
>+	struct {
>+		u16 major;
>+		u16 minor;
>+	} version;
>+	u8 num_of_priorities;
>+};
>+
>+/**
>+ * dpdmai_get_attributes() - Retrieve DPDMAI 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 DPDMAI object
>+ * @attr:	Returned object's attributes
>+ *
>+ * Return:	'0' on Success; Error code otherwise.
>+ */
>+int dpdmai_get_attributes(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+			  u16 token, struct dpdmai_attr	*attr);
>+
>+/**
>+ * enum dpdmai_dest - DPDMAI destination types
>+ * @DPDMAI_DEST_NONE: Unassigned destination; The queue is set in
>parked mode
>+ *	and does not generate FQDAN notifications; user is expected to dequeue
>+ *	from the queue based on polling or other user-defined method
>+ * @DPDMAI_DEST_DPIO: The queue is set in schedule mode and generates
>FQDAN
>+ *	notifications to the specified DPIO; user is expected to dequeue
>+ *	from the queue only after notification is received
>+ * @DPDMAI_DEST_DPCON: The queue is set in schedule mode and does not
>generate
>+ *	FQDAN notifications, but is connected to the specified DPCON object;
>+ *	user is expected to dequeue from the DPCON channel
>+ */
>+enum dpdmai_dest {
>+	DPDMAI_DEST_NONE = 0,
>+	DPDMAI_DEST_DPIO = 1,
>+	DPDMAI_DEST_DPCON = 2
>+};
>+
>+/**
>+ * struct dpdmai_dest_cfg - Structure representing DPDMAI destination
>+parameters
>+ * @dest_type: Destination type
>+ * @dest_id: Either DPIO ID or DPCON ID, depending on the destination
>+type
>+ * @priority: Priority selection within the DPIO or DPCON channel; valid
>values
>+ *	are 0-1 or 0-7, depending on the number of priorities in that
>+ *	channel; not relevant for 'DPDMAI_DEST_NONE' option
>+ */
>+struct dpdmai_dest_cfg {
>+	enum dpdmai_dest dest_type;
>+	int dest_id;
>+	u8 priority;
>+};
>+
>+/**
>+ * struct dpdmai_rx_queue_cfg - DPDMAI RX queue configuration
>+ * @options: Flags representing the suggested modifications to the queue;
>+ *	Use any combination of 'DPDMAI_QUEUE_OPT_<X>' flags
>+ * @user_ctx: User context value provided in the frame descriptor of each
>+ *	dequeued frame;
>+ *	valid only if 'DPDMAI_QUEUE_OPT_USER_CTX' is contained in 'options'
>+ * @dest_cfg: Queue destination parameters;
>+ *	valid only if 'DPDMAI_QUEUE_OPT_DEST' is contained in 'options'
>+ */
>+struct dpdmai_rx_queue_cfg {
>+	struct dpdmai_dest_cfg dest_cfg;
>+	u32 options;
>+	u64 user_ctx;
>+
>+};
>+
>+/**
>+ * dpdmai_set_rx_queue() - Set Rx queue configuration
>+ * @mc_io:	Pointer to MC portal's I/O object
>+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
>+ * @token:	Token of DPDMAI object
>+ * @priority:	Select the queue relative to number of
>+ *		priorities configured at DPDMAI creation
>+ * @cfg:	Rx queue configuration
>+ *
>+ * Return:	'0' on Success; Error code otherwise.
>+ */
>+int dpdmai_set_rx_queue(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+			u16 token, u8 priority,
>+			const struct dpdmai_rx_queue_cfg *cfg);
>+
>+/**
>+ * struct dpdmai_rx_queue_attr - Structure representing attributes of
>+Rx queues
>+ * @user_ctx:  User context value provided in the frame descriptor of each
>+ *	 dequeued frame
>+ * @dest_cfg: Queue destination configuration
>+ * @fqid: Virtual FQID value to be used for dequeue operations  */
>+struct dpdmai_rx_queue_attr {
>+	struct dpdmai_dest_cfg	dest_cfg;
>+	u64 user_ctx;
>+	u32 fqid;
>+};
>+
>+/**
>+ * dpdmai_get_rx_queue() - Retrieve Rx queue 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 DPDMAI object
>+ * @priority:	Select the queue relative to number of
>+ *				priorities configured at DPDMAI creation
>+ * @attr:	Returned Rx queue attributes
>+ *
>+ * Return:	'0' on Success; Error code otherwise.
>+ */
>+int dpdmai_get_rx_queue(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+			u16 token, u8 priority,
>+			struct dpdmai_rx_queue_attr *attr);
>+
>+/**
>+ * struct dpdmai_tx_queue_attr - Structure representing attributes of
>+Tx queues
>+ * @fqid: Virtual FQID to be used for sending frames to DMA hardware
>+*/
>+
>+struct dpdmai_tx_queue_attr {
>+	u32 fqid;
>+};
>+
>+/**
>+ * dpdmai_get_tx_queue() - Retrieve Tx queue 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 DPDMAI object
>+ * @priority:	Select the queue relative to number of
>+ *			priorities configured at DPDMAI creation
>+ * @attr:	Returned Tx queue attributes
>+ *
>+ * Return:	'0' on Success; Error code otherwise.
>+ */
>+int dpdmai_get_tx_queue(struct fsl_mc_io *mc_io, u32 cmd_flags,
>+			u16 token, u8 priority,
>+			struct dpdmai_tx_queue_attr *attr);
>+
>+#endif /* __FSL_DPDMAI_H */
>--
>1.7.1

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