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1// SPDX-License-Identifier: GPL-2.0-only2//3// Copyright(c) 2019-2022 Intel Corporation4//5// Author: Cezary Rojewski <cezary.rojewski@intel.com>6//7// Code moved to this file by:8// Jyri Sarha <jyri.sarha@intel.com>9//10 11#include <linux/stddef.h>12#include <sound/soc.h>13#include <sound/sof/header.h>14#include "sof-client.h"15#include "sof-client-probes.h"16 17struct sof_probe_dma {18 unsigned int stream_tag;19 unsigned int dma_buffer_size;20} __packed;21 22struct sof_ipc_probe_dma_add_params {23 struct sof_ipc_cmd_hdr hdr;24 unsigned int num_elems;25 struct sof_probe_dma dma[];26} __packed;27 28struct sof_ipc_probe_info_params {29 struct sof_ipc_reply rhdr;30 unsigned int num_elems;31 union {32 DECLARE_FLEX_ARRAY(struct sof_probe_dma, dma);33 DECLARE_FLEX_ARRAY(struct sof_probe_point_desc, desc);34 };35} __packed;36 37struct sof_ipc_probe_point_add_params {38 struct sof_ipc_cmd_hdr hdr;39 unsigned int num_elems;40 struct sof_probe_point_desc desc[];41} __packed;42 43struct sof_ipc_probe_point_remove_params {44 struct sof_ipc_cmd_hdr hdr;45 unsigned int num_elems;46 unsigned int buffer_id[];47} __packed;48 49/**50 * ipc3_probes_init - initialize data probing51 * @cdev: SOF client device52 * @stream_tag: Extractor stream tag53 * @buffer_size: DMA buffer size to set for extractor54 *55 * Host chooses whether extraction is supported or not by providing56 * valid stream tag to DSP. Once specified, stream described by that57 * tag will be tied to DSP for extraction for the entire lifetime of58 * probe.59 *60 * Probing is initialized only once and each INIT request must be61 * matched by DEINIT call.62 */63static int ipc3_probes_init(struct sof_client_dev *cdev, u32 stream_tag,64 size_t buffer_size)65{66 struct sof_ipc_probe_dma_add_params *msg;67 size_t size = struct_size(msg, dma, 1);68 int ret;69 70 msg = kmalloc(size, GFP_KERNEL);71 if (!msg)72 return -ENOMEM;73 msg->hdr.size = size;74 msg->hdr.cmd = SOF_IPC_GLB_PROBE | SOF_IPC_PROBE_INIT;75 msg->num_elems = 1;76 msg->dma[0].stream_tag = stream_tag;77 msg->dma[0].dma_buffer_size = buffer_size;78 79 ret = sof_client_ipc_tx_message_no_reply(cdev, msg);80 kfree(msg);81 return ret;82}83 84/**85 * ipc3_probes_deinit - cleanup after data probing86 * @cdev: SOF client device87 *88 * Host sends DEINIT request to free previously initialized probe89 * on DSP side once it is no longer needed. DEINIT only when there90 * are no probes connected and with all injectors detached.91 */92static int ipc3_probes_deinit(struct sof_client_dev *cdev)93{94 struct sof_ipc_cmd_hdr msg;95 96 msg.size = sizeof(msg);97 msg.cmd = SOF_IPC_GLB_PROBE | SOF_IPC_PROBE_DEINIT;98 99 return sof_client_ipc_tx_message_no_reply(cdev, &msg);100}101 102static int ipc3_probes_info(struct sof_client_dev *cdev, unsigned int cmd,103 void **params, size_t *num_params)104{105 size_t max_msg_size = sof_client_get_ipc_max_payload_size(cdev);106 struct sof_ipc_probe_info_params msg = {{{0}}};107 struct sof_ipc_probe_info_params *reply;108 size_t bytes;109 int ret;110 111 *params = NULL;112 *num_params = 0;113 114 reply = kzalloc(max_msg_size, GFP_KERNEL);115 if (!reply)116 return -ENOMEM;117 msg.rhdr.hdr.size = sizeof(msg);118 msg.rhdr.hdr.cmd = SOF_IPC_GLB_PROBE | cmd;119 120 ret = sof_client_ipc_tx_message(cdev, &msg, reply, max_msg_size);121 if (ret < 0 || reply->rhdr.error < 0)122 goto exit;123 124 if (!reply->num_elems)125 goto exit;126 127 if (cmd == SOF_IPC_PROBE_DMA_INFO)128 bytes = sizeof(reply->dma[0]);129 else130 bytes = sizeof(reply->desc[0]);131 bytes *= reply->num_elems;132 *params = kmemdup(&reply->dma[0], bytes, GFP_KERNEL);133 if (!*params) {134 ret = -ENOMEM;135 goto exit;136 }137 *num_params = reply->num_elems;138 139exit:140 kfree(reply);141 return ret;142}143 144/**145 * ipc3_probes_points_info - retrieve list of active probe points146 * @cdev: SOF client device147 * @desc: Returned list of active probes148 * @num_desc: Returned count of active probes149 *150 * Host sends PROBE_POINT_INFO request to obtain list of active probe151 * points, valid for disconnection when given probe is no longer152 * required.153 */154static int ipc3_probes_points_info(struct sof_client_dev *cdev,155 struct sof_probe_point_desc **desc,156 size_t *num_desc)157{158 return ipc3_probes_info(cdev, SOF_IPC_PROBE_POINT_INFO,159 (void **)desc, num_desc);160}161 162/**163 * ipc3_probes_points_add - connect specified probes164 * @cdev: SOF client device165 * @desc: List of probe points to connect166 * @num_desc: Number of elements in @desc167 *168 * Dynamically connects to provided set of endpoints. Immediately169 * after connection is established, host must be prepared to170 * transfer data from or to target stream given the probing purpose.171 *172 * Each probe point should be removed using PROBE_POINT_REMOVE173 * request when no longer needed.174 */175static int ipc3_probes_points_add(struct sof_client_dev *cdev,176 struct sof_probe_point_desc *desc,177 size_t num_desc)178{179 struct sof_ipc_probe_point_add_params *msg;180 size_t size = struct_size(msg, desc, num_desc);181 int ret;182 183 msg = kmalloc(size, GFP_KERNEL);184 if (!msg)185 return -ENOMEM;186 msg->hdr.size = size;187 msg->num_elems = num_desc;188 msg->hdr.cmd = SOF_IPC_GLB_PROBE | SOF_IPC_PROBE_POINT_ADD;189 memcpy(&msg->desc[0], desc, size - sizeof(*msg));190 191 ret = sof_client_ipc_tx_message_no_reply(cdev, msg);192 kfree(msg);193 return ret;194}195 196/**197 * ipc3_probes_points_remove - disconnect specified probes198 * @cdev: SOF client device199 * @buffer_id: List of probe points to disconnect200 * @num_buffer_id: Number of elements in @desc201 *202 * Removes previously connected probes from list of active probe203 * points and frees all resources on DSP side.204 */205static int ipc3_probes_points_remove(struct sof_client_dev *cdev,206 unsigned int *buffer_id,207 size_t num_buffer_id)208{209 struct sof_ipc_probe_point_remove_params *msg;210 size_t size = struct_size(msg, buffer_id, num_buffer_id);211 int ret;212 213 msg = kmalloc(size, GFP_KERNEL);214 if (!msg)215 return -ENOMEM;216 msg->hdr.size = size;217 msg->num_elems = num_buffer_id;218 msg->hdr.cmd = SOF_IPC_GLB_PROBE | SOF_IPC_PROBE_POINT_REMOVE;219 memcpy(&msg->buffer_id[0], buffer_id, size - sizeof(*msg));220 221 ret = sof_client_ipc_tx_message_no_reply(cdev, msg);222 kfree(msg);223 return ret;224}225 226const struct sof_probes_ipc_ops ipc3_probe_ops = {227 .init = ipc3_probes_init,228 .deinit = ipc3_probes_deinit,229 .points_info = ipc3_probes_points_info,230 .points_add = ipc3_probes_points_add,231 .points_remove = ipc3_probes_points_remove,232};233