1/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
2/*
3 * Copyright 2014-2016 Freescale Semiconductor Inc.
4 * Copyright 2016 NXP
5 *
6 */
7#ifndef __FSL_DPAA2_GLOBAL_H
8#define __FSL_DPAA2_GLOBAL_H
9
10#include <linux/types.h>
11#include <linux/cpumask.h>
12#include "dpaa2-fd.h"
13
14struct dpaa2_dq {
15 union {
16 struct common {
17 u8 verb;
18 u8 reserved[63];
19 } common;
20 struct dq {
21 u8 verb;
22 u8 stat;
23 __le16 seqnum;
24 __le16 oprid;
25 u8 reserved;
26 u8 tok;
27 __le32 fqid;
28 u32 reserved2;
29 __le32 fq_byte_cnt;
30 __le32 fq_frm_cnt;
31 __le64 fqd_ctx;
32 u8 fd[32];
33 } dq;
34 struct scn {
35 u8 verb;
36 u8 stat;
37 u8 state;
38 u8 reserved;
39 __le32 rid_tok;
40 __le64 ctx;
41 } scn;
42 };
43};
44
45/* Parsing frame dequeue results */
46/* FQ empty */
47#define DPAA2_DQ_STAT_FQEMPTY 0x80
48/* FQ held active */
49#define DPAA2_DQ_STAT_HELDACTIVE 0x40
50/* FQ force eligible */
51#define DPAA2_DQ_STAT_FORCEELIGIBLE 0x20
52/* valid frame */
53#define DPAA2_DQ_STAT_VALIDFRAME 0x10
54/* FQ ODP enable */
55#define DPAA2_DQ_STAT_ODPVALID 0x04
56/* volatile dequeue */
57#define DPAA2_DQ_STAT_VOLATILE 0x02
58/* volatile dequeue command is expired */
59#define DPAA2_DQ_STAT_EXPIRED 0x01
60
61#define DQ_FQID_MASK 0x00FFFFFF
62#define DQ_FRAME_COUNT_MASK 0x00FFFFFF
63
64/**
65 * dpaa2_dq_flags() - Get the stat field of dequeue response
66 * @dq: the dequeue result.
67 */
68static inline u32 dpaa2_dq_flags(const struct dpaa2_dq *dq)
69{
70 return dq->dq.stat;
71}
72
73/**
74 * dpaa2_dq_is_pull() - Check whether the dq response is from a pull
75 * command.
76 * @dq: the dequeue result
77 *
78 * Return 1 for volatile(pull) dequeue, 0 for static dequeue.
79 */
80static inline int dpaa2_dq_is_pull(const struct dpaa2_dq *dq)
81{
82 return (int)(dpaa2_dq_flags(dq) & DPAA2_DQ_STAT_VOLATILE);
83}
84
85/**
86 * dpaa2_dq_is_pull_complete() - Check whether the pull command is completed.
87 * @dq: the dequeue result
88 *
89 * Return boolean.
90 */
91static inline bool dpaa2_dq_is_pull_complete(const struct dpaa2_dq *dq)
92{
93 return !!(dpaa2_dq_flags(dq) & DPAA2_DQ_STAT_EXPIRED);
94}
95
96/**
97 * dpaa2_dq_seqnum() - Get the seqnum field in dequeue response
98 * @dq: the dequeue result
99 *
100 * seqnum is valid only if VALIDFRAME flag is TRUE
101 *
102 * Return seqnum.
103 */
104static inline u16 dpaa2_dq_seqnum(const struct dpaa2_dq *dq)
105{
106 return le16_to_cpu(dq->dq.seqnum);
107}
108
109/**
110 * dpaa2_dq_odpid() - Get the odpid field in dequeue response
111 * @dq: the dequeue result
112 *
113 * odpid is valid only if ODPVALID flag is TRUE.
114 *
115 * Return odpid.
116 */
117static inline u16 dpaa2_dq_odpid(const struct dpaa2_dq *dq)
118{
119 return le16_to_cpu(dq->dq.oprid);
120}
121
122/**
123 * dpaa2_dq_fqid() - Get the fqid in dequeue response
124 * @dq: the dequeue result
125 *
126 * Return fqid.
127 */
128static inline u32 dpaa2_dq_fqid(const struct dpaa2_dq *dq)
129{
130 return le32_to_cpu(dq->dq.fqid) & DQ_FQID_MASK;
131}
132
133/**
134 * dpaa2_dq_byte_count() - Get the byte count in dequeue response
135 * @dq: the dequeue result
136 *
137 * Return the byte count remaining in the FQ.
138 */
139static inline u32 dpaa2_dq_byte_count(const struct dpaa2_dq *dq)
140{
141 return le32_to_cpu(dq->dq.fq_byte_cnt);
142}
143
144/**
145 * dpaa2_dq_frame_count() - Get the frame count in dequeue response
146 * @dq: the dequeue result
147 *
148 * Return the frame count remaining in the FQ.
149 */
150static inline u32 dpaa2_dq_frame_count(const struct dpaa2_dq *dq)
151{
152 return le32_to_cpu(dq->dq.fq_frm_cnt) & DQ_FRAME_COUNT_MASK;
153}
154
155/**
156 * dpaa2_dq_fd_ctx() - Get the frame queue context in dequeue response
157 * @dq: the dequeue result
158 *
159 * Return the frame queue context.
160 */
161static inline u64 dpaa2_dq_fqd_ctx(const struct dpaa2_dq *dq)
162{
163 return le64_to_cpu(dq->dq.fqd_ctx);
164}
165
166/**
167 * dpaa2_dq_fd() - Get the frame descriptor in dequeue response
168 * @dq: the dequeue result
169 *
170 * Return the frame descriptor.
171 */
172static inline const struct dpaa2_fd *dpaa2_dq_fd(const struct dpaa2_dq *dq)
173{
174 return (const struct dpaa2_fd *)&dq->dq.fd[0];
175}
176
177#define DPAA2_CSCN_SIZE sizeof(struct dpaa2_dq)
178#define DPAA2_CSCN_ALIGN 16
179#define DPAA2_CSCN_STATE_CG BIT(0)
180
181/**
182 * dpaa2_cscn_state_congested() - Check congestion state
183 * @cscn: congestion SCN (delivered to WQ or memory)
184 *
185i * Return true is congested.
186 */
187static inline bool dpaa2_cscn_state_congested(struct dpaa2_dq *cscn)
188{
189 return !!(cscn->scn.state & DPAA2_CSCN_STATE_CG);
190}
191
192#endif /* __FSL_DPAA2_GLOBAL_H */
193

source code of linux/include/soc/fsl/dpaa2-global.h