include/linux/rio_mport_cdev.h

   1 /*
   2  * Copyright (c) 2015-2016, Integrated Device Technology Inc.
   3  * Copyright (c) 2015, Prodrive Technologies
   4  * Copyright (c) 2015, Texas Instruments Incorporated
   5  * Copyright (c) 2015, RapidIO Trade Association
   6  * All rights reserved.
   7  *
   8  * This software is available to you under a choice of one of two licenses.
   9  * You may choose to be licensed under the terms of the GNU General Public
  10  * License(GPL) Version 2, or the BSD-3 Clause license below:
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions are met:
  14  *
  15  * 1. Redistributions of source code must retain the above copyright notice,
  16  * this list of conditions and the following disclaimer.
  17  *
  18  * 2. Redistributions in binary form must reproduce the above copyright notice,
  19  * this list of conditions and the following disclaimer in the documentation
  20  * and/or other materials provided with the distribution.
  21  *
  22  * 3. Neither the name of the copyright holder nor the names of its contributors
  23  * may be used to endorse or promote products derived from this software without
  24  * specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  27  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  28  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
  30  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  31  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  32  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
  33  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  34  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  35  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #ifndef _RIO_MPORT_CDEV_H_
  40 #define _RIO_MPORT_CDEV_H_
  41
  42 #ifndef __user
  43 #define __user
  44 #endif
  45
  46 struct rio_mport_maint_io {
  47         uint32_t rioid;         /* destID of remote device */
  48         uint32_t hopcount;      /* hopcount to remote device */
  49         uint32_t offset;        /* offset in register space */
  50         size_t length;          /* length in bytes */
  51         void __user *buffer;    /* data buffer */
  52 };
  53
  54 /*
  55  * Definitions for RapidIO data transfers:
  56  * - memory mapped (MAPPED)
  57  * - packet generation from memory (TRANSFER)
  58  */
  59 #define RIO_TRANSFER_MODE_MAPPED        (1 << 0)
  60 #define RIO_TRANSFER_MODE_TRANSFER      (1 << 1)
  61 #define RIO_CAP_DBL_SEND                (1 << 2)
  62 #define RIO_CAP_DBL_RECV                (1 << 3)
  63 #define RIO_CAP_PW_SEND                 (1 << 4)
  64 #define RIO_CAP_PW_RECV                 (1 << 5)
  65 #define RIO_CAP_MAP_OUTB                (1 << 6)
  66 #define RIO_CAP_MAP_INB                 (1 << 7)
  67
  68 struct rio_mport_properties {
  69         uint16_t hdid;
  70         uint8_t id;                     /* Physical port ID */
  71         uint8_t  index;
  72         uint32_t flags;
  73         uint32_t sys_size;              /* Default addressing size */
  74         uint8_t  port_ok;
  75         uint8_t  link_speed;
  76         uint8_t  link_width;
  77         uint32_t dma_max_sge;
  78         uint32_t dma_max_size;
  79         uint32_t dma_align;
  80         uint32_t transfer_mode;         /* Default transfer mode */
  81         uint32_t cap_sys_size;          /* Capable system sizes */
  82         uint32_t cap_addr_size;         /* Capable addressing sizes */
  83         uint32_t cap_transfer_mode;     /* Capable transfer modes */
  84         uint32_t cap_mport;             /* Mport capabilities */
  85 };
  86
  87 /*
  88  * Definitions for RapidIO events;
  89  * - incoming port-writes
  90  * - incoming doorbells
  91  */
  92 #define RIO_DOORBELL    (1 << 0)
  93 #define RIO_PORTWRITE   (1 << 1)
  94
  95 struct rio_doorbell {
  96         uint32_t rioid;
  97         uint16_t payload;
  98 };
  99
 100 struct rio_doorbell_filter {
 101         uint32_t rioid;                 /* 0xffffffff to match all ids */
 102         uint16_t low;
 103         uint16_t high;
 104 };
 105
 106
 107 struct rio_portwrite {
 108         uint32_t payload[16];
 109 };
 110
 111 struct rio_pw_filter {
 112         uint32_t mask;
 113         uint32_t low;
 114         uint32_t high;
 115 };
 116
 117 /* RapidIO base address for inbound requests set to value defined below
 118  * indicates that no specific RIO-to-local address translation is requested
 119  * and driver should use direct (one-to-one) address mapping.
 120 */
 121 #define RIO_MAP_ANY_ADDR        (uint64_t)(~((uint64_t) 0))
 122
 123 struct rio_mmap {
 124         uint32_t rioid;
 125         uint64_t rio_addr;
 126         uint64_t length;
 127         uint64_t handle;
 128         void *address;
 129 };
 130
 131 struct rio_dma_mem {
 132         uint64_t length;                /* length of DMA memory */
 133         uint64_t dma_handle;            /* handle associated with this memory */
 134         void *buffer;                   /* pointer to this memory */
 135 };
 136
 137
 138 struct rio_event {
 139         unsigned int header;    /* event type RIO_DOORBELL or RIO_PORTWRITE */
 140         union {
 141                 struct rio_doorbell doorbell;   /* header for RIO_DOORBELL */
 142                 struct rio_portwrite portwrite; /* header for RIO_PORTWRITE */
 143         } u;
 144 };
 145
 146 enum rio_transfer_sync {
 147         RIO_TRANSFER_SYNC,      /* synchronous transfer */
 148         RIO_TRANSFER_ASYNC,     /* asynchronous transfer */
 149         RIO_TRANSFER_FAF,       /* fire-and-forget transfer */
 150 };
 151
 152 enum rio_transfer_dir {
 153         RIO_TRANSFER_DIR_READ,  /* Read operation */
 154         RIO_TRANSFER_DIR_WRITE, /* Write operation */
 155 };
 156
 157 /*
 158  * RapidIO data exchange transactions are lists of individual transfers. Each
 159  * transfer exchanges data between two RapidIO devices by remote direct memory
 160  * access and has its own completion code.
 161  *
 162  * The RapidIO specification defines four types of data exchange requests:
 163  * NREAD, NWRITE, SWRITE and NWRITE_R. The RapidIO DMA channel interface allows
 164  * to specify the required type of write operation or combination of them when
 165  * only the last data packet requires response.
 166  *
 167  * NREAD:    read up to 256 bytes from remote device memory into local memory
 168  * NWRITE:   write up to 256 bytes from local memory to remote device memory
 169  *           without confirmation
 170  * SWRITE:   as NWRITE, but all addresses and payloads must be 64-bit aligned
 171  * NWRITE_R: as NWRITE, but expect acknowledgment from remote device.
 172  *
 173  * The default exchange is chosen from NREAD and any of the WRITE modes as the
 174  * driver sees fit. For write requests the user can explicitly choose between
 175  * any of the write modes for each transaction.
 176  */
 177 enum rio_exchange {
 178         RIO_EXCHANGE_DEFAULT,   /* Default method */
 179         RIO_EXCHANGE_NWRITE,    /* All packets using NWRITE */
 180         RIO_EXCHANGE_SWRITE,    /* All packets using SWRITE */
 181         RIO_EXCHANGE_NWRITE_R,  /* Last packet NWRITE_R, others NWRITE */
 182         RIO_EXCHANGE_SWRITE_R,  /* Last packet NWRITE_R, others SWRITE */
 183         RIO_EXCHANGE_NWRITE_R_ALL, /* All packets using NWRITE_R */
 184 };
 185
 186 struct rio_transfer_io {
 187         uint32_t rioid;                 /* Target destID */
 188         uint64_t rio_addr;              /* Address in target's RIO mem space */
 189         enum rio_exchange method;       /* Data exchange method */
 190         void __user *loc_addr;
 191         uint64_t handle;
 192         uint64_t offset;                /* Offset in buffer */
 193         uint64_t length;                /* Length in bytes */
 194         uint32_t completion_code;       /* Completion code for this transfer */
 195 };
 196
 197 struct rio_transaction {
 198         uint32_t transfer_mode;         /* Data transfer mode */
 199         enum rio_transfer_sync sync;    /* Synchronization method */
 200         enum rio_transfer_dir dir;      /* Transfer direction */
 201         size_t count;                   /* Number of transfers */
 202         struct rio_transfer_io __user *block;   /* Array of <count> transfers */
 203 };
 204
 205 struct rio_async_tx_wait {
 206         uint32_t token;         /* DMA transaction ID token */
 207         uint32_t timeout;       /* Wait timeout in msec, if 0 use default TO */
 208 };
 209
 210 #define RIO_MAX_DEVNAME_SZ      20
 211
 212 struct rio_rdev_info {
 213         uint32_t destid;
 214         uint8_t hopcount;
 215         uint32_t comptag;
 216         char name[RIO_MAX_DEVNAME_SZ + 1];
 217 };
 218
 219 /* Driver IOCTL codes */
 220 #define RIO_MPORT_DRV_MAGIC           'm'
 221
 222 #define RIO_MPORT_MAINT_HDID_SET        \
 223         _IOW(RIO_MPORT_DRV_MAGIC, 1, uint16_t)
 224 #define RIO_MPORT_MAINT_COMPTAG_SET     \
 225         _IOW(RIO_MPORT_DRV_MAGIC, 2, uint32_t)
 226 #define RIO_MPORT_MAINT_PORT_IDX_GET    \
 227         _IOR(RIO_MPORT_DRV_MAGIC, 3, uint32_t)
 228 #define RIO_MPORT_GET_PROPERTIES \
 229         _IOR(RIO_MPORT_DRV_MAGIC, 4, struct rio_mport_properties)
 230 #define RIO_MPORT_MAINT_READ_LOCAL \
 231         _IOR(RIO_MPORT_DRV_MAGIC, 5, struct rio_mport_maint_io)
 232 #define RIO_MPORT_MAINT_WRITE_LOCAL \
 233         _IOW(RIO_MPORT_DRV_MAGIC, 6, struct rio_mport_maint_io)
 234 #define RIO_MPORT_MAINT_READ_REMOTE \
 235         _IOR(RIO_MPORT_DRV_MAGIC, 7, struct rio_mport_maint_io)
 236 #define RIO_MPORT_MAINT_WRITE_REMOTE \
 237         _IOW(RIO_MPORT_DRV_MAGIC, 8, struct rio_mport_maint_io)
 238 #define RIO_ENABLE_DOORBELL_RANGE       \
 239         _IOW(RIO_MPORT_DRV_MAGIC, 9, struct rio_doorbell_filter)
 240 #define RIO_DISABLE_DOORBELL_RANGE      \
 241         _IOW(RIO_MPORT_DRV_MAGIC, 10, struct rio_doorbell_filter)
 242 #define RIO_ENABLE_PORTWRITE_RANGE      \
 243         _IOW(RIO_MPORT_DRV_MAGIC, 11, struct rio_pw_filter)
 244 #define RIO_DISABLE_PORTWRITE_RANGE     \
 245         _IOW(RIO_MPORT_DRV_MAGIC, 12, struct rio_pw_filter)
 246 #define RIO_SET_EVENT_MASK              \
 247         _IOW(RIO_MPORT_DRV_MAGIC, 13, unsigned int)
 248 #define RIO_GET_EVENT_MASK              \
 249         _IOR(RIO_MPORT_DRV_MAGIC, 14, unsigned int)
 250 #define RIO_MAP_OUTBOUND \
 251         _IOWR(RIO_MPORT_DRV_MAGIC, 15, struct rio_mmap)
 252 #define RIO_UNMAP_OUTBOUND \
 253         _IOW(RIO_MPORT_DRV_MAGIC, 16, struct rio_mmap)
 254 #define RIO_MAP_INBOUND \
 255         _IOWR(RIO_MPORT_DRV_MAGIC, 17, struct rio_mmap)
 256 #define RIO_UNMAP_INBOUND \
 257         _IOW(RIO_MPORT_DRV_MAGIC, 18, uint64_t)
 258 #define RIO_ALLOC_DMA \
 259         _IOWR(RIO_MPORT_DRV_MAGIC, 19, struct rio_dma_mem)
 260 #define RIO_FREE_DMA \
 261         _IOW(RIO_MPORT_DRV_MAGIC, 20, uint64_t)
 262 #define RIO_TRANSFER \
 263         _IOWR(RIO_MPORT_DRV_MAGIC, 21, struct rio_transaction)
 264 #define RIO_WAIT_FOR_ASYNC \
 265         _IOW(RIO_MPORT_DRV_MAGIC, 22, struct rio_async_tx_wait)
 266 #define RIO_DEV_ADD \
 267         _IOW(RIO_MPORT_DRV_MAGIC, 23, struct rio_rdev_info)
 268 #define RIO_DEV_DEL \
 269         _IOW(RIO_MPORT_DRV_MAGIC, 24, struct rio_rdev_info)
 270
 271 #endif /* _RIO_MPORT_CDEV_H_ */