summaryrefslogtreecommitdiffstats
path: root/drivers/bus/fslmc/mc/fsl_dpci.h
blob: f4aa6e570ea664486d85dcad392debdd4e0995b8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
/*-
 * This file is provided under a dual BSD/GPLv2 license. When using or
 * redistributing this file, you may do so under either license.
 *
 *   BSD LICENSE
 *
 * Copyright 2013-2016 Freescale Semiconductor Inc.
 *
 * 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.
 *
 *   GPL LICENSE SUMMARY
 *
 * 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_DPCI_H
#define __FSL_DPCI_H

/* Data Path Communication Interface API
 * Contains initialization APIs and runtime control APIs for DPCI
 */

struct fsl_mc_io;

/** General DPCI macros */

/**
 * Maximum number of Tx/Rx priorities per DPCI object
 */
#define DPCI_PRIO_NUM		2

/**
 * Indicates an invalid frame queue
 */
#define DPCI_FQID_NOT_VALID	(uint32_t)(-1)

/**
 * All queues considered; see dpci_set_rx_queue()
 */
#define DPCI_ALL_QUEUES		(uint8_t)(-1)

int dpci_open(struct fsl_mc_io *mc_io,
	      uint32_t cmd_flags,
	      int dpci_id,
	      uint16_t *token);

int dpci_close(struct fsl_mc_io *mc_io,
	       uint32_t cmd_flags,
	       uint16_t token);

/**
 * Enable the Order Restoration support
 */
#define DPCI_OPT_HAS_OPR					0x000040

/**
 * Order Point Records are shared for the entire DPCI
 */
#define DPCI_OPT_OPR_SHARED					0x000080

/**
 * struct dpci_cfg - Structure representing DPCI configuration
 * @options: Any combination of the following options:
 *		DPCI_OPT_HAS_OPR
 *		DPCI_OPT_OPR_SHARED
 * @num_of_priorities:	Number of receive priorities (queues) for the DPCI;
 *			note, that the number of transmit priorities (queues)
 *			is determined by the number of receive priorities of
 *			the peer DPCI object
 */
struct dpci_cfg {
	uint32_t options;
	uint8_t num_of_priorities;
};

int dpci_create(struct fsl_mc_io *mc_io,
		uint16_t dprc_token,
		uint32_t cmd_flags,
		const struct dpci_cfg *cfg,
		uint32_t *obj_id);

int dpci_destroy(struct fsl_mc_io *mc_io,
		 uint16_t dprc_token,
		 uint32_t cmd_flags,
		 uint32_t object_id);

int dpci_enable(struct fsl_mc_io *mc_io,
		uint32_t cmd_flags,
		uint16_t token);

int dpci_disable(struct fsl_mc_io *mc_io,
		 uint32_t cmd_flags,
		 uint16_t token);

int dpci_is_enabled(struct fsl_mc_io *mc_io,
		    uint32_t cmd_flags,
		    uint16_t token,
		    int *en);

int dpci_reset(struct fsl_mc_io *mc_io,
	       uint32_t cmd_flags,
	       uint16_t token);

/**
 * struct dpci_attr - Structure representing DPCI attributes
 * @id:			DPCI object ID
 * @num_of_priorities:	Number of receive priorities
 */
struct dpci_attr {
	int id;
	uint8_t num_of_priorities;
};

int dpci_get_attributes(struct fsl_mc_io *mc_io,
			uint32_t cmd_flags,
			uint16_t token,
			struct dpci_attr *attr);

/**
 * enum dpci_dest - DPCI destination types
 * @DPCI_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
 * @DPCI_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
 * @DPCI_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 dpci_dest {
	DPCI_DEST_NONE = 0,
	DPCI_DEST_DPIO = 1,
	DPCI_DEST_DPCON = 2
};

/**
 * struct dpci_dest_cfg - Structure representing DPCI destination configuration
 * @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 'DPCI_DEST_NONE' option
 */
struct dpci_dest_cfg {
	enum dpci_dest dest_type;
	int dest_id;
	uint8_t priority;
};

/** DPCI queue modification options */

/**
 * Select to modify the user's context associated with the queue
 */
#define DPCI_QUEUE_OPT_USER_CTX		0x00000001

/**
 * Select to modify the queue's destination
 */
#define DPCI_QUEUE_OPT_DEST		0x00000002

/**
 * struct dpci_rx_queue_cfg - Structure representing RX queue configuration
 * @options:	Flags representing the suggested modifications to the queue;
 *		Use any combination of 'DPCI_QUEUE_OPT_<X>' flags
 * @user_ctx:	User context value provided in the frame descriptor of each
 *		dequeued frame;
 *		valid only if 'DPCI_QUEUE_OPT_USER_CTX' is contained in
 *		'options'
 * @dest_cfg:	Queue destination parameters;
 *		valid only if 'DPCI_QUEUE_OPT_DEST' is contained in 'options'
 */
struct dpci_rx_queue_cfg {
	uint32_t options;
	uint64_t user_ctx;
	struct dpci_dest_cfg dest_cfg;
};

int dpci_set_rx_queue(struct fsl_mc_io *mc_io,
		      uint32_t cmd_flags,
		      uint16_t token,
		      uint8_t priority,
		      const struct dpci_rx_queue_cfg *cfg);

/**
 * struct dpci_rx_queue_attr - Structure representing Rx queue attributes
 * @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 dpci_rx_queue_attr {
	uint64_t user_ctx;
	struct dpci_dest_cfg dest_cfg;
	uint32_t fqid;
};

int dpci_get_rx_queue(struct fsl_mc_io *mc_io,
		      uint32_t cmd_flags,
		      uint16_t token,
		      uint8_t priority,
		      struct dpci_rx_queue_attr	*attr);

/**
 * struct dpci_tx_queue_attr - Structure representing attributes of Tx queues
 * @fqid:	Virtual FQID to be used for sending frames to peer DPCI;
 *		returns 'DPCI_FQID_NOT_VALID' if a no peer is connected or if
 *		the selected priority exceeds the number of priorities of the
 *		peer DPCI object
 */
struct dpci_tx_queue_attr {
	uint32_t fqid;
};

int dpci_get_tx_queue(struct fsl_mc_io *mc_io,
		      uint32_t cmd_flags,
		      uint16_t token,
		      uint8_t priority,
		      struct dpci_tx_queue_attr *attr);

int dpci_get_api_version(struct fsl_mc_io *mc_io,
			 uint32_t cmd_flags,
			 uint16_t *major_ver,
			 uint16_t *minor_ver);

#endif /* __FSL_DPCI_H */