Commit 780b6263 authored by Roy Pledge's avatar Roy Pledge Committed by Greg Kroah-Hartman

bus: fsl-mc: dpio: add the DPAA2 DPIO service interface

The DPIO service interface handles initialization of DPIO objects
and exports APIs to be used by other DPAA2 object drivers to perform
queuing and buffer management related operations.  The service allows
registration of callbacks when frames or notifications are received.
Signed-off-by: default avatarRoy Pledge <roy.pledge@nxp.com>
Signed-off-by: default avatarHaiying Wang <haiying.wang@nxp.com>
Signed-off-by: default avatarStuart Yoder <stuart.yoder@nxp.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 321eecb0
......@@ -6,4 +6,4 @@ subdir-ccflags-y := -Werror
obj-$(CONFIG_FSL_MC_DPIO) += fsl-mc-dpio.o
fsl-mc-dpio-objs := dpio.o qbman-portal.o
fsl-mc-dpio-objs := dpio.o qbman-portal.o dpio-service.o
This diff is collapsed.
/*
* Copyright 2014-2016 Freescale Semiconductor Inc.
* Copyright NXP
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* names of its 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
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*
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*/
#ifndef __FSL_DPAA2_IO_H
#define __FSL_DPAA2_IO_H
#include <linux/types.h>
#include <linux/cpumask.h>
#include "dpaa2-fd.h"
#include "dpaa2-global.h"
struct dpaa2_io;
struct dpaa2_io_store;
struct device;
/**
* DOC: DPIO Service
*
* The DPIO service provides APIs for users to interact with the datapath
* by enqueueing and dequeing frame descriptors.
*
* The following set of APIs can be used to enqueue and dequeue frames
* as well as producing notification callbacks when data is available
* for dequeue.
*/
/**
* struct dpaa2_io_desc - The DPIO descriptor
* @receives_notifications: Use notificaton mode. Non-zero if the DPIO
* has a channel.
* @has_8prio: Set to non-zero for channel with 8 priority WQs. Ignored
* unless receives_notification is TRUE.
* @cpu: The cpu index that at least interrupt handlers will
* execute on.
* @stash_affinity: The stash affinity for this portal favour 'cpu'
* @regs_cena: The cache enabled regs.
* @regs_cinh: The cache inhibited regs
* @dpio_id: The dpio index
* @qman_version: The qman version
*
* Describes the attributes and features of the DPIO object.
*/
struct dpaa2_io_desc {
int receives_notifications;
int has_8prio;
int cpu;
void *regs_cena;
void *regs_cinh;
int dpio_id;
u32 qman_version;
};
struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc);
void dpaa2_io_down(struct dpaa2_io *d);
irqreturn_t dpaa2_io_irq(struct dpaa2_io *obj);
/**
* struct dpaa2_io_notification_ctx - The DPIO notification context structure
* @cb: The callback to be invoked when the notification arrives
* @is_cdan: Zero for FQDAN, non-zero for CDAN
* @id: FQID or channel ID, needed for rearm
* @desired_cpu: The cpu on which the notifications will show up. -1 means
* any CPU.
* @dpio_id: The dpio index
* @qman64: The 64-bit context value shows up in the FQDAN/CDAN.
* @node: The list node
* @dpio_private: The dpio object internal to dpio_service
*
* Used when a FQDAN/CDAN registration is made by drivers.
*/
struct dpaa2_io_notification_ctx {
void (*cb)(struct dpaa2_io_notification_ctx *);
int is_cdan;
u32 id;
int desired_cpu;
int dpio_id;
u64 qman64;
struct list_head node;
void *dpio_private;
};
int dpaa2_io_service_register(struct dpaa2_io *service,
struct dpaa2_io_notification_ctx *ctx);
void dpaa2_io_service_deregister(struct dpaa2_io *service,
struct dpaa2_io_notification_ctx *ctx);
int dpaa2_io_service_rearm(struct dpaa2_io *service,
struct dpaa2_io_notification_ctx *ctx);
int dpaa2_io_service_pull_fq(struct dpaa2_io *d, u32 fqid,
struct dpaa2_io_store *s);
int dpaa2_io_service_pull_channel(struct dpaa2_io *d, u32 channelid,
struct dpaa2_io_store *s);
int dpaa2_io_service_enqueue_fq(struct dpaa2_io *d, u32 fqid,
const struct dpaa2_fd *fd);
int dpaa2_io_service_enqueue_qd(struct dpaa2_io *d, u32 qdid, u8 prio,
u16 qdbin, const struct dpaa2_fd *fd);
int dpaa2_io_service_release(struct dpaa2_io *d, u32 bpid,
const u64 *buffers, unsigned int num_buffers);
int dpaa2_io_service_acquire(struct dpaa2_io *d, u32 bpid,
u64 *buffers, unsigned int num_buffers);
struct dpaa2_io_store *dpaa2_io_store_create(unsigned int max_frames,
struct device *dev);
void dpaa2_io_store_destroy(struct dpaa2_io_store *s);
struct dpaa2_dq *dpaa2_io_store_next(struct dpaa2_io_store *s, int *is_last);
#endif /* __FSL_DPAA2_IO_H */
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