sound/soc/sof/compress.c

   1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
   2 //
   3 // This file is provided under a dual BSD/GPLv2 license.  When using or
   4 // redistributing this file, you may do so under either license.
   5 //
   6 // Copyright(c) 2019-2020 Intel Corporation. All rights reserved.
   7 //
   8 // Author: Cezary Rojewski <cezary.rojewski@intel.com>
   9 //
  10
  11 #include <sound/soc.h>
  12 #include "compress.h"
  13 #include "ops.h"
  14 #include "probe.h"
  15
  16 struct snd_compr_ops sof_probe_compressed_ops = {
  17         .copy           = sof_probe_compr_copy,
  18 };
  19 EXPORT_SYMBOL(sof_probe_compressed_ops);
  20
  21 int sof_probe_compr_open(struct snd_compr_stream *cstream,
  22                 struct snd_soc_dai *dai)
  23 {
  24         struct snd_sof_dev *sdev =
  25                                 snd_soc_component_get_drvdata(dai->component);
  26         int ret;
  27
  28         ret = snd_sof_probe_compr_assign(sdev, cstream, dai);
  29         if (ret < 0) {
  30                 dev_err(dai->dev, "Failed to assign probe stream: %d\n", ret);
  31                 return ret;
  32         }
  33
  34         sdev->extractor_stream_tag = ret;
  35         return 0;
  36 }
  37 EXPORT_SYMBOL(sof_probe_compr_open);
  38
  39 int sof_probe_compr_free(struct snd_compr_stream *cstream,
  40                 struct snd_soc_dai *dai)
  41 {
  42         struct snd_sof_dev *sdev =
  43                                 snd_soc_component_get_drvdata(dai->component);
  44         struct sof_probe_point_desc *desc;
  45         size_t num_desc;
  46         int i, ret;
  47
  48         /* disconnect all probe points */
  49         ret = sof_ipc_probe_points_info(sdev, &desc, &num_desc);
  50         if (ret < 0) {
  51                 dev_err(dai->dev, "Failed to get probe points: %d\n", ret);
  52                 goto exit;
  53         }
  54
  55         for (i = 0; i < num_desc; i++)
  56                 sof_ipc_probe_points_remove(sdev, &desc[i].buffer_id, 1);
  57         kfree(desc);
  58
  59 exit:
  60         ret = sof_ipc_probe_deinit(sdev);
  61         if (ret < 0)
  62                 dev_err(dai->dev, "Failed to deinit probe: %d\n", ret);
  63
  64         sdev->extractor_stream_tag = SOF_PROBE_INVALID_NODE_ID;
  65         snd_compr_free_pages(cstream);
  66
  67         return snd_sof_probe_compr_free(sdev, cstream, dai);
  68 }
  69 EXPORT_SYMBOL(sof_probe_compr_free);
  70
  71 int sof_probe_compr_set_params(struct snd_compr_stream *cstream,
  72                 struct snd_compr_params *params, struct snd_soc_dai *dai)
  73 {
  74         struct snd_compr_runtime *rtd = cstream->runtime;
  75         struct snd_sof_dev *sdev =
  76                                 snd_soc_component_get_drvdata(dai->component);
  77         int ret;
  78
  79         cstream->dma_buffer.dev.type = SNDRV_DMA_TYPE_DEV_SG;
  80         cstream->dma_buffer.dev.dev = sdev->dev;
  81         ret = snd_compr_malloc_pages(cstream, rtd->buffer_size);
  82         if (ret < 0)
  83                 return ret;
  84
  85         ret = snd_sof_probe_compr_set_params(sdev, cstream, params, dai);
  86         if (ret < 0)
  87                 return ret;
  88
  89         ret = sof_ipc_probe_init(sdev, sdev->extractor_stream_tag,
  90                                  rtd->dma_bytes);
  91         if (ret < 0) {
  92                 dev_err(dai->dev, "Failed to init probe: %d\n", ret);
  93                 return ret;
  94         }
  95
  96         return 0;
  97 }
  98 EXPORT_SYMBOL(sof_probe_compr_set_params);
  99
 100 int sof_probe_compr_trigger(struct snd_compr_stream *cstream, int cmd,
 101                 struct snd_soc_dai *dai)
 102 {
 103         struct snd_sof_dev *sdev =
 104                                 snd_soc_component_get_drvdata(dai->component);
 105
 106         return snd_sof_probe_compr_trigger(sdev, cstream, cmd, dai);
 107 }
 108 EXPORT_SYMBOL(sof_probe_compr_trigger);
 109
 110 int sof_probe_compr_pointer(struct snd_compr_stream *cstream,
 111                 struct snd_compr_tstamp *tstamp, struct snd_soc_dai *dai)
 112 {
 113         struct snd_sof_dev *sdev =
 114                                 snd_soc_component_get_drvdata(dai->component);
 115
 116         return snd_sof_probe_compr_pointer(sdev, cstream, tstamp, dai);
 117 }
 118 EXPORT_SYMBOL(sof_probe_compr_pointer);
 119
 120 int sof_probe_compr_copy(struct snd_compr_stream *cstream,
 121                 char __user *buf, size_t count)
 122 {
 123         struct snd_compr_runtime *rtd = cstream->runtime;
 124         unsigned int offset, n;
 125         void *ptr;
 126         int ret;
 127
 128         if (count > rtd->buffer_size)
 129                 count = rtd->buffer_size;
 130
 131         div_u64_rem(rtd->total_bytes_transferred, rtd->buffer_size, &offset);
 132         ptr = rtd->dma_area + offset;
 133         n = rtd->buffer_size - offset;
 134
 135         if (count < n) {
 136                 ret = copy_to_user(buf, ptr, count);
 137         } else {
 138                 ret = copy_to_user(buf, ptr, n);
 139                 ret += copy_to_user(buf + n, rtd->dma_area, count - n);
 140         }
 141
 142         if (ret)
 143                 return count - ret;
 144         return count;
 145 }
 146 EXPORT_SYMBOL(sof_probe_compr_copy);