LXR dpdk/drivers/net/enetfec/enet

   1/* SPDX-License-Identifier: BSD-3-Clause
   2 * Copyright 2021 NXP
   3 */
   4
   5#include "enet_ethdev.h"
   6
   7/* Prefix path to sysfs directory where UIO device attributes are exported.
   8 * Path for UIO device X is /sys/class/uio/uioX
   9 */
  10#define FEC_UIO_DEVICE_SYS_ATTR_PATH    "/sys/class/uio"
  11
  12/* Subfolder in sysfs where mapping attributes are exported
  13 * for each UIO device. Path for mapping Y for device X is:
  14 * /sys/class/uio/uioX/maps/mapY
  15 */
  16#define FEC_UIO_DEVICE_SYS_MAP_ATTR     "maps/map"
  17
  18/* Name of UIO device file prefix. Each UIO device will have a device file
  19 * /dev/uioX, where X is the minor device number.
  20 */
  21#define FEC_UIO_DEVICE_FILE_NAME        "/dev/uio"
  22/*
  23 * Name of UIO device. User space FEC will have a corresponding
  24 * UIO device.
  25 * Maximum length is #FEC_UIO_MAX_DEVICE_NAME_LENGTH.
  26 *
  27 * @note  Must be kept in sync with FEC kernel driver
  28 * define #FEC_UIO_DEVICE_NAME !
  29 */
  30#define FEC_UIO_DEVICE_NAME     "imx-fec-uio"
  31
  32/* Maximum length for the name of an UIO device file.
  33 * Device file name format is: /dev/uioX.
  34 */
  35#define FEC_UIO_MAX_DEVICE_FILE_NAME_LENGTH     30
  36
  37/* Maximum length for the name of an attribute file for an UIO device.
  38 * Attribute files are exported in sysfs and have the name formatted as:
  39 * /sys/class/uio/uioX/<attribute_file_name>
  40 */
  41#define FEC_UIO_MAX_ATTR_FILE_NAME      100
  42
  43/* The id for the mapping used to export ENETFEC registers and BD memory to
  44 * user space through UIO device.
  45 */
  46#define FEC_UIO_REG_MAP_ID              0
  47#define FEC_UIO_BD_MAP_ID               1
  48
  49#define MAP_PAGE_SIZE                   4096
  50
  51struct uio_job {
  52        uint32_t fec_id;
  53        int uio_fd;
  54        void *bd_start_addr;
  55        void *register_base_addr;
  56        int map_size;
  57        uint64_t map_addr;
  58        int uio_minor_number;
  59};
  60
  61int enetfec_configure(void);
  62int config_enetfec_uio(struct enetfec_private *fep);
  63void enetfec_uio_init(void);
  64void enetfec_cleanup(struct enetfec_private *fep);
  65