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1/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
2/*
3 * Copyright 2014-2016 Freescale Semiconductor Inc.
4 * Copyright NXP
5 *
6 */
7#ifndef __FSL_DPAA2_IO_H
8#define __FSL_DPAA2_IO_H
9
10#include <linux/types.h>
11#include <linux/cpumask.h>
12#include <linux/irqreturn.h>
13
14#include "dpaa2-fd.h"
15#include "dpaa2-global.h"
16
17struct dpaa2_io;
18struct dpaa2_io_store;
19struct device;
20
21/**
22 * DOC: DPIO Service
23 *
24 * The DPIO service provides APIs for users to interact with the datapath
25 * by enqueueing and dequeing frame descriptors.
26 *
27 * The following set of APIs can be used to enqueue and dequeue frames
28 * as well as producing notification callbacks when data is available
29 * for dequeue.
30 */
31
32#define DPAA2_IO_ANY_CPU -1
33
34/**
35 * struct dpaa2_io_desc - The DPIO descriptor
36 * @receives_notifications: Use notificaton mode. Non-zero if the DPIO
37 * has a channel.
38 * @has_8prio: Set to non-zero for channel with 8 priority WQs. Ignored
39 * unless receives_notification is TRUE.
40 * @cpu: The cpu index that at least interrupt handlers will
41 * execute on.
42 * @stash_affinity: The stash affinity for this portal favour 'cpu'
43 * @regs_cena: The cache enabled regs.
44 * @regs_cinh: The cache inhibited regs
45 * @dpio_id: The dpio index
46 * @qman_version: The qman version
47 *
48 * Describes the attributes and features of the DPIO object.
49 */
50struct dpaa2_io_desc {
51 int receives_notifications;
52 int has_8prio;
53 int cpu;
54 void *regs_cena;
55 void __iomem *regs_cinh;
56 int dpio_id;
57 u32 qman_version;
58};
59
60struct dpaa2_io *dpaa2_io_create(const struct dpaa2_io_desc *desc);
61
62void dpaa2_io_down(struct dpaa2_io *d);
63
64irqreturn_t dpaa2_io_irq(struct dpaa2_io *obj);
65
66struct dpaa2_io *dpaa2_io_service_select(int cpu);
67
68/**
69 * struct dpaa2_io_notification_ctx - The DPIO notification context structure
70 * @cb: The callback to be invoked when the notification arrives
71 * @is_cdan: Zero for FQDAN, non-zero for CDAN
72 * @id: FQID or channel ID, needed for rearm
73 * @desired_cpu: The cpu on which the notifications will show up. Use
74 * DPAA2_IO_ANY_CPU if don't care
75 * @dpio_id: The dpio index
76 * @qman64: The 64-bit context value shows up in the FQDAN/CDAN.
77 * @node: The list node
78 * @dpio_private: The dpio object internal to dpio_service
79 *
80 * Used when a FQDAN/CDAN registration is made by drivers.
81 */
82struct dpaa2_io_notification_ctx {
83 void (*cb)(struct dpaa2_io_notification_ctx *ctx);
84 int is_cdan;
85 u32 id;
86 int desired_cpu;
87 int dpio_id;
88 u64 qman64;
89 struct list_head node;
90 void *dpio_private;
91};
92
93int dpaa2_io_service_register(struct dpaa2_io *service,
94 struct dpaa2_io_notification_ctx *ctx);
95void dpaa2_io_service_deregister(struct dpaa2_io *service,
96 struct dpaa2_io_notification_ctx *ctx);
97int dpaa2_io_service_rearm(struct dpaa2_io *service,
98 struct dpaa2_io_notification_ctx *ctx);
99
100int dpaa2_io_service_pull_fq(struct dpaa2_io *d, u32 fqid,
101 struct dpaa2_io_store *s);
102int dpaa2_io_service_pull_channel(struct dpaa2_io *d, u32 channelid,
103 struct dpaa2_io_store *s);
104
105int dpaa2_io_service_enqueue_fq(struct dpaa2_io *d, u32 fqid,
106 const struct dpaa2_fd *fd);
107int dpaa2_io_service_enqueue_qd(struct dpaa2_io *d, u32 qdid, u8 prio,
108 u16 qdbin, const struct dpaa2_fd *fd);
109int dpaa2_io_service_release(struct dpaa2_io *d, u32 bpid,
110 const u64 *buffers, unsigned int num_buffers);
111int dpaa2_io_service_acquire(struct dpaa2_io *d, u32 bpid,
112 u64 *buffers, unsigned int num_buffers);
113
114struct dpaa2_io_store *dpaa2_io_store_create(unsigned int max_frames,
115 struct device *dev);
116void dpaa2_io_store_destroy(struct dpaa2_io_store *s);
117struct dpaa2_dq *dpaa2_io_store_next(struct dpaa2_io_store *s, int *is_last);
118
119int dpaa2_io_query_fq_count(struct dpaa2_io *d, u32 fqid,
120 u32 *fcnt, u32 *bcnt);
121int dpaa2_io_query_bp_count(struct dpaa2_io *d, u16 bpid,
122 u32 *num);
123#endif /* __FSL_DPAA2_IO_H */