drivers/bus/fsl-mc/dpcon.c

   1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
   2 /*
   3  * Copyright 2013-2016 Freescale Semiconductor Inc.
   4  *
   5  */
   6 #include <linux/kernel.h>
   7 #include <linux/fsl/mc.h>
   8 #include <linux/fsl/mc.h>
   9
  10 #include "fsl-mc-private.h"
  11
  12 /**
  13  * dpcon_open() - Open a control session for the specified object
  14  * @mc_io:      Pointer to MC portal's I/O object
  15  * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
  16  * @dpcon_id:   DPCON unique ID
  17  * @token:      Returned token; use in subsequent API calls
  18  *
  19  * This function can be used to open a control session for an
  20  * already created object; an object may have been declared in
  21  * the DPL or by calling the dpcon_create() function.
  22  * This function returns a unique authentication token,
  23  * associated with the specific object ID and the specific MC
  24  * portal; this token must be used in all subsequent commands for
  25  * this specific object.
  26  *
  27  * Return:      '0' on Success; Error code otherwise.
  28  */
  29 int dpcon_open(struct fsl_mc_io *mc_io,
  30                u32 cmd_flags,
  31                int dpcon_id,
  32                u16 *token)
  33 {
  34         struct fsl_mc_command cmd = { 0 };
  35         struct dpcon_cmd_open *dpcon_cmd;
  36         int err;
  37
  38         /* prepare command */
  39         cmd.header = mc_encode_cmd_header(DPCON_CMDID_OPEN,
  40                                           cmd_flags,
  41                                           0);
  42         dpcon_cmd = (struct dpcon_cmd_open *)cmd.params;
  43         dpcon_cmd->dpcon_id = cpu_to_le32(dpcon_id);
  44
  45         /* send command to mc*/
  46         err = mc_send_command(mc_io, &cmd);
  47         if (err)
  48                 return err;
  49
  50         /* retrieve response parameters */
  51         *token = mc_cmd_hdr_read_token(&cmd);
  52
  53         return 0;
  54 }
  55 EXPORT_SYMBOL_GPL(dpcon_open);
  56
  57 /**
  58  * dpcon_close() - Close the control session of the object
  59  * @mc_io:      Pointer to MC portal's I/O object
  60  * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
  61  * @token:      Token of DPCON object
  62  *
  63  * After this function is called, no further operations are
  64  * allowed on the object without opening a new control session.
  65  *
  66  * Return:      '0' on Success; Error code otherwise.
  67  */
  68 int dpcon_close(struct fsl_mc_io *mc_io,
  69                 u32 cmd_flags,
  70                 u16 token)
  71 {
  72         struct fsl_mc_command cmd = { 0 };
  73
  74         /* prepare command */
  75         cmd.header = mc_encode_cmd_header(DPCON_CMDID_CLOSE,
  76                                           cmd_flags,
  77                                           token);
  78
  79         /* send command to mc*/
  80         return mc_send_command(mc_io, &cmd);
  81 }
  82 EXPORT_SYMBOL_GPL(dpcon_close);
  83
  84 /**
  85  * dpcon_enable() - Enable the DPCON
  86  * @mc_io:      Pointer to MC portal's I/O object
  87  * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
  88  * @token:      Token of DPCON object
  89  *
  90  * Return:      '0' on Success; Error code otherwise
  91  */
  92 int dpcon_enable(struct fsl_mc_io *mc_io,
  93                  u32 cmd_flags,
  94                  u16 token)
  95 {
  96         struct fsl_mc_command cmd = { 0 };
  97
  98         /* prepare command */
  99         cmd.header = mc_encode_cmd_header(DPCON_CMDID_ENABLE,
 100                                           cmd_flags,
 101                                           token);
 102
 103         /* send command to mc*/
 104         return mc_send_command(mc_io, &cmd);
 105 }
 106 EXPORT_SYMBOL_GPL(dpcon_enable);
 107
 108 /**
 109  * dpcon_disable() - Disable the DPCON
 110  * @mc_io:      Pointer to MC portal's I/O object
 111  * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 112  * @token:      Token of DPCON object
 113  *
 114  * Return:      '0' on Success; Error code otherwise
 115  */
 116 int dpcon_disable(struct fsl_mc_io *mc_io,
 117                   u32 cmd_flags,
 118                   u16 token)
 119 {
 120         struct fsl_mc_command cmd = { 0 };
 121
 122         /* prepare command */
 123         cmd.header = mc_encode_cmd_header(DPCON_CMDID_DISABLE,
 124                                           cmd_flags,
 125                                           token);
 126
 127         /* send command to mc*/
 128         return mc_send_command(mc_io, &cmd);
 129 }
 130 EXPORT_SYMBOL_GPL(dpcon_disable);
 131
 132 /**
 133  * dpcon_reset() - Reset the DPCON, returns the object to initial state.
 134  * @mc_io:      Pointer to MC portal's I/O object
 135  * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 136  * @token:      Token of DPCON object
 137  *
 138  * Return:      '0' on Success; Error code otherwise.
 139  */
 140 int dpcon_reset(struct fsl_mc_io *mc_io,
 141                 u32 cmd_flags,
 142                 u16 token)
 143 {
 144         struct fsl_mc_command cmd = { 0 };
 145
 146         /* prepare command */
 147         cmd.header = mc_encode_cmd_header(DPCON_CMDID_RESET,
 148                                           cmd_flags, token);
 149
 150         /* send command to mc*/
 151         return mc_send_command(mc_io, &cmd);
 152 }
 153 EXPORT_SYMBOL_GPL(dpcon_reset);
 154
 155 /**
 156  * dpcon_get_attributes() - Retrieve DPCON attributes.
 157  * @mc_io:      Pointer to MC portal's I/O object
 158  * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 159  * @token:      Token of DPCON object
 160  * @attr:       Object's attributes
 161  *
 162  * Return:      '0' on Success; Error code otherwise.
 163  */
 164 int dpcon_get_attributes(struct fsl_mc_io *mc_io,
 165                          u32 cmd_flags,
 166                          u16 token,
 167                          struct dpcon_attr *attr)
 168 {
 169         struct fsl_mc_command cmd = { 0 };
 170         struct dpcon_rsp_get_attr *dpcon_rsp;
 171         int err;
 172
 173         /* prepare command */
 174         cmd.header = mc_encode_cmd_header(DPCON_CMDID_GET_ATTR,
 175                                           cmd_flags,
 176                                           token);
 177
 178         /* send command to mc*/
 179         err = mc_send_command(mc_io, &cmd);
 180         if (err)
 181                 return err;
 182
 183         /* retrieve response parameters */
 184         dpcon_rsp = (struct dpcon_rsp_get_attr *)cmd.params;
 185         attr->id = le32_to_cpu(dpcon_rsp->id);
 186         attr->qbman_ch_id = le16_to_cpu(dpcon_rsp->qbman_ch_id);
 187         attr->num_priorities = dpcon_rsp->num_priorities;
 188
 189         return 0;
 190 }
 191 EXPORT_SYMBOL_GPL(dpcon_get_attributes);
 192
 193 /**
 194  * dpcon_set_notification() - Set DPCON notification destination
 195  * @mc_io:      Pointer to MC portal's I/O object
 196  * @cmd_flags:  Command flags; one or more of 'MC_CMD_FLAG_'
 197  * @token:      Token of DPCON object
 198  * @cfg:        Notification parameters
 199  *
 200  * Return:      '0' on Success; Error code otherwise
 201  */
 202 int dpcon_set_notification(struct fsl_mc_io *mc_io,
 203                            u32 cmd_flags,
 204                            u16 token,
 205                            struct dpcon_notification_cfg *cfg)
 206 {
 207         struct fsl_mc_command cmd = { 0 };
 208         struct dpcon_cmd_set_notification *dpcon_cmd;
 209
 210         /* prepare command */
 211         cmd.header = mc_encode_cmd_header(DPCON_CMDID_SET_NOTIFICATION,
 212                                           cmd_flags,
 213                                           token);
 214         dpcon_cmd = (struct dpcon_cmd_set_notification *)cmd.params;
 215         dpcon_cmd->dpio_id = cpu_to_le32(cfg->dpio_id);
 216         dpcon_cmd->priority = cfg->priority;
 217         dpcon_cmd->user_ctx = cpu_to_le64(cfg->user_ctx);
 218
 219         /* send command to mc*/
 220         return mc_send_command(mc_io, &cmd);
 221 }
 222 EXPORT_SYMBOL_GPL(dpcon_set_notification);