1/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
2/*
3 * Copyright (c) 2015-2016, Integrated Device Technology Inc.
4 * Copyright (c) 2015, Prodrive Technologies
5 * Copyright (c) 2015, Texas Instruments Incorporated
6 * Copyright (c) 2015, RapidIO Trade Association
7 * All rights reserved.
8 *
9 * This software is available to you under a choice of one of two licenses.
10 * You may choose to be licensed under the terms of the GNU General Public
11 * License(GPL) Version 2, or the BSD-3 Clause license below:
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright notice,
17 * this list of conditions and the following disclaimer.
18 *
19 * 2. Redistributions in binary form must reproduce the above copyright notice,
20 * this list of conditions and the following disclaimer in the documentation
21 * and/or other materials provided with the distribution.
22 *
23 * 3. Neither the name of the copyright holder nor the names of its contributors
24 * may be used to endorse or promote products derived from this software without
25 * specific prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
28 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
29 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
31 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
32 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
33 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
34 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
35 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
36 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
37 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 */
39
40#ifndef _RIO_MPORT_CDEV_H_
41#define _RIO_MPORT_CDEV_H_
42
43#include <linux/ioctl.h>
44#include <linux/types.h>
45
46struct rio_mport_maint_io {
47 __u16 rioid; /* destID of remote device */
48 __u8 hopcount; /* hopcount to remote device */
49 __u8 pad0[5];
50 __u32 offset; /* offset in register space */
51 __u32 length; /* length in bytes */
52 __u64 buffer; /* pointer to data buffer */
53};
54
55/*
56 * Definitions for RapidIO data transfers:
57 * - memory mapped (MAPPED)
58 * - packet generation from memory (TRANSFER)
59 */
60#define RIO_TRANSFER_MODE_MAPPED (1 << 0)
61#define RIO_TRANSFER_MODE_TRANSFER (1 << 1)
62#define RIO_CAP_DBL_SEND (1 << 2)
63#define RIO_CAP_DBL_RECV (1 << 3)
64#define RIO_CAP_PW_SEND (1 << 4)
65#define RIO_CAP_PW_RECV (1 << 5)
66#define RIO_CAP_MAP_OUTB (1 << 6)
67#define RIO_CAP_MAP_INB (1 << 7)
68
69struct rio_mport_properties {
70 __u16 hdid;
71 __u8 id; /* Physical port ID */
72 __u8 index;
73 __u32 flags;
74 __u32 sys_size; /* Default addressing size */
75 __u8 port_ok;
76 __u8 link_speed;
77 __u8 link_width;
78 __u8 pad0;
79 __u32 dma_max_sge;
80 __u32 dma_max_size;
81 __u32 dma_align;
82 __u32 transfer_mode; /* Default transfer mode */
83 __u32 cap_sys_size; /* Capable system sizes */
84 __u32 cap_addr_size; /* Capable addressing sizes */
85 __u32 cap_transfer_mode; /* Capable transfer modes */
86 __u32 cap_mport; /* Mport capabilities */
87};
88
89/*
90 * Definitions for RapidIO events;
91 * - incoming port-writes
92 * - incoming doorbells
93 */
94#define RIO_DOORBELL (1 << 0)
95#define RIO_PORTWRITE (1 << 1)
96
97struct rio_doorbell {
98 __u16 rioid;
99 __u16 payload;
100};
101
102struct rio_doorbell_filter {
103 __u16 rioid; /* Use RIO_INVALID_DESTID to match all ids */
104 __u16 low;
105 __u16 high;
106 __u16 pad0;
107};
108
109
110struct rio_portwrite {
111 __u32 payload[16];
112};
113
114struct rio_pw_filter {
115 __u32 mask;
116 __u32 low;
117 __u32 high;
118 __u32 pad0;
119};
120
121/* RapidIO base address for inbound requests set to value defined below
122 * indicates that no specific RIO-to-local address translation is requested
123 * and driver should use direct (one-to-one) address mapping.
124*/
125#define RIO_MAP_ANY_ADDR (__u64)(~((__u64) 0))
126
127struct rio_mmap {
128 __u16 rioid;
129 __u16 pad0[3];
130 __u64 rio_addr;
131 __u64 length;
132 __u64 handle;
133 __u64 address;
134};
135
136struct rio_dma_mem {
137 __u64 length; /* length of DMA memory */
138 __u64 dma_handle; /* handle associated with this memory */
139 __u64 address;
140};
141
142struct rio_event {
143 __u32 header; /* event type RIO_DOORBELL or RIO_PORTWRITE */
144 union {
145 struct rio_doorbell doorbell; /* header for RIO_DOORBELL */
146 struct rio_portwrite portwrite; /* header for RIO_PORTWRITE */
147 } u;
148 __u32 pad0;
149};
150
151enum rio_transfer_sync {
152 RIO_TRANSFER_SYNC, /* synchronous transfer */
153 RIO_TRANSFER_ASYNC, /* asynchronous transfer */
154 RIO_TRANSFER_FAF, /* fire-and-forget transfer */
155};
156
157enum rio_transfer_dir {
158 RIO_TRANSFER_DIR_READ, /* Read operation */
159 RIO_TRANSFER_DIR_WRITE, /* Write operation */
160};
161
162/*
163 * RapidIO data exchange transactions are lists of individual transfers. Each
164 * transfer exchanges data between two RapidIO devices by remote direct memory
165 * access and has its own completion code.
166 *
167 * The RapidIO specification defines four types of data exchange requests:
168 * NREAD, NWRITE, SWRITE and NWRITE_R. The RapidIO DMA channel interface allows
169 * to specify the required type of write operation or combination of them when
170 * only the last data packet requires response.
171 *
172 * NREAD: read up to 256 bytes from remote device memory into local memory
173 * NWRITE: write up to 256 bytes from local memory to remote device memory
174 * without confirmation
175 * SWRITE: as NWRITE, but all addresses and payloads must be 64-bit aligned
176 * NWRITE_R: as NWRITE, but expect acknowledgment from remote device.
177 *
178 * The default exchange is chosen from NREAD and any of the WRITE modes as the
179 * driver sees fit. For write requests the user can explicitly choose between
180 * any of the write modes for each transaction.
181 */
182enum rio_exchange {
183 RIO_EXCHANGE_DEFAULT, /* Default method */
184 RIO_EXCHANGE_NWRITE, /* All packets using NWRITE */
185 RIO_EXCHANGE_SWRITE, /* All packets using SWRITE */
186 RIO_EXCHANGE_NWRITE_R, /* Last packet NWRITE_R, others NWRITE */
187 RIO_EXCHANGE_SWRITE_R, /* Last packet NWRITE_R, others SWRITE */
188 RIO_EXCHANGE_NWRITE_R_ALL, /* All packets using NWRITE_R */
189};
190
191struct rio_transfer_io {
192 __u64 rio_addr; /* Address in target's RIO mem space */
193 __u64 loc_addr;
194 __u64 handle;
195 __u64 offset; /* Offset in buffer */
196 __u64 length; /* Length in bytes */
197 __u16 rioid; /* Target destID */
198 __u16 method; /* Data exchange method, one of rio_exchange enum */
199 __u32 completion_code; /* Completion code for this transfer */
200};
201
202struct rio_transaction {
203 __u64 block; /* Pointer to array of <count> transfers */
204 __u32 count; /* Number of transfers */
205 __u32 transfer_mode; /* Data transfer mode */
206 __u16 sync; /* Synch method, one of rio_transfer_sync enum */
207 __u16 dir; /* Transfer direction, one of rio_transfer_dir enum */
208 __u32 pad0;
209};
210
211struct rio_async_tx_wait {
212 __u32 token; /* DMA transaction ID token */
213 __u32 timeout; /* Wait timeout in msec, if 0 use default TO */
214};
215
216#define RIO_MAX_DEVNAME_SZ 20
217
218struct rio_rdev_info {
219 __u16 destid;
220 __u8 hopcount;
221 __u8 pad0;
222 __u32 comptag;
223 char name[RIO_MAX_DEVNAME_SZ + 1];
224};
225
226/* Driver IOCTL codes */
227#define RIO_MPORT_DRV_MAGIC 'm'
228
229#define RIO_MPORT_MAINT_HDID_SET \
230 _IOW(RIO_MPORT_DRV_MAGIC, 1, __u16)
231#define RIO_MPORT_MAINT_COMPTAG_SET \
232 _IOW(RIO_MPORT_DRV_MAGIC, 2, __u32)
233#define RIO_MPORT_MAINT_PORT_IDX_GET \
234 _IOR(RIO_MPORT_DRV_MAGIC, 3, __u32)
235#define RIO_MPORT_GET_PROPERTIES \
236 _IOR(RIO_MPORT_DRV_MAGIC, 4, struct rio_mport_properties)
237#define RIO_MPORT_MAINT_READ_LOCAL \
238 _IOR(RIO_MPORT_DRV_MAGIC, 5, struct rio_mport_maint_io)
239#define RIO_MPORT_MAINT_WRITE_LOCAL \
240 _IOW(RIO_MPORT_DRV_MAGIC, 6, struct rio_mport_maint_io)
241#define RIO_MPORT_MAINT_READ_REMOTE \
242 _IOR(RIO_MPORT_DRV_MAGIC, 7, struct rio_mport_maint_io)
243#define RIO_MPORT_MAINT_WRITE_REMOTE \
244 _IOW(RIO_MPORT_DRV_MAGIC, 8, struct rio_mport_maint_io)
245#define RIO_ENABLE_DOORBELL_RANGE \
246 _IOW(RIO_MPORT_DRV_MAGIC, 9, struct rio_doorbell_filter)
247#define RIO_DISABLE_DOORBELL_RANGE \
248 _IOW(RIO_MPORT_DRV_MAGIC, 10, struct rio_doorbell_filter)
249#define RIO_ENABLE_PORTWRITE_RANGE \
250 _IOW(RIO_MPORT_DRV_MAGIC, 11, struct rio_pw_filter)
251#define RIO_DISABLE_PORTWRITE_RANGE \
252 _IOW(RIO_MPORT_DRV_MAGIC, 12, struct rio_pw_filter)
253#define RIO_SET_EVENT_MASK \
254 _IOW(RIO_MPORT_DRV_MAGIC, 13, __u32)
255#define RIO_GET_EVENT_MASK \
256 _IOR(RIO_MPORT_DRV_MAGIC, 14, __u32)
257#define RIO_MAP_OUTBOUND \
258 _IOWR(RIO_MPORT_DRV_MAGIC, 15, struct rio_mmap)
259#define RIO_UNMAP_OUTBOUND \
260 _IOW(RIO_MPORT_DRV_MAGIC, 16, struct rio_mmap)
261#define RIO_MAP_INBOUND \
262 _IOWR(RIO_MPORT_DRV_MAGIC, 17, struct rio_mmap)
263#define RIO_UNMAP_INBOUND \
264 _IOW(RIO_MPORT_DRV_MAGIC, 18, __u64)
265#define RIO_ALLOC_DMA \
266 _IOWR(RIO_MPORT_DRV_MAGIC, 19, struct rio_dma_mem)
267#define RIO_FREE_DMA \
268 _IOW(RIO_MPORT_DRV_MAGIC, 20, __u64)
269#define RIO_TRANSFER \
270 _IOWR(RIO_MPORT_DRV_MAGIC, 21, struct rio_transaction)
271#define RIO_WAIT_FOR_ASYNC \
272 _IOW(RIO_MPORT_DRV_MAGIC, 22, struct rio_async_tx_wait)
273#define RIO_DEV_ADD \
274 _IOW(RIO_MPORT_DRV_MAGIC, 23, struct rio_rdev_info)
275#define RIO_DEV_DEL \
276 _IOW(RIO_MPORT_DRV_MAGIC, 24, struct rio_rdev_info)
277
278#endif /* _RIO_MPORT_CDEV_H_ */
279

source code of linux/include/uapi/linux/rio_mport_cdev.h