leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

hal2: convert to dma_alloc_noncoherent

Browse Source 
Use the new non-coherent DMA API including proper ownership transfers.
This also means we can allocate the buffer memory with the proper
direction instead of bidirectional.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Christoph Hellwig 2020-09-01 13:26:46 +02:00
parent bd9b848557
commit ed4bc1890b
1 changed files with 27 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

58
sound/mips/hal2.c
View File

@ -441,7 +441,8 @@ static inline void hal2_stop_adc(struct snd_hal2 *hal2)
hal2->adc.pbus.pbus->pbdma_ctrl = HPC3_PDMACTRL_LD;
}
static int hal2_alloc_dmabuf(struct snd_hal2 *hal2, struct hal2_codec *codec)
static int hal2_alloc_dmabuf(struct snd_hal2 *hal2, struct hal2_codec *codec,
enum dma_data_direction buffer_dir)
{
struct device *dev = hal2->card->dev;
struct hal2_desc *desc;
@ -449,15 +450,15 @@ static int hal2_alloc_dmabuf(struct snd_hal2 *hal2, struct hal2_codec *codec)
int count = H2_BUF_SIZE / H2_BLOCK_SIZE;
int i;
codec->buffer = dma_alloc_attrs(dev, H2_BUF_SIZE, &buffer_dma,
GFP_KERNEL, DMA_ATTR_NON_CONSISTENT);
codec->buffer = dma_alloc_noncoherent(dev, H2_BUF_SIZE, &buffer_dma,
buffer_dir, GFP_KERNEL);
if (!codec->buffer)
return -ENOMEM;
desc = dma_alloc_attrs(dev, count * sizeof(struct hal2_desc),
&desc_dma, GFP_KERNEL, DMA_ATTR_NON_CONSISTENT);
desc = dma_alloc_noncoherent(dev, count * sizeof(struct hal2_desc),
&desc_dma, DMA_BIDIRECTIONAL, GFP_KERNEL);
if (!desc) {
dma_free_attrs(dev, H2_BUF_SIZE, codec->buffer, buffer_dma,
DMA_ATTR_NON_CONSISTENT);
dma_free_noncoherent(dev, H2_BUF_SIZE, codec->buffer, buffer_dma,
buffer_dir);
return -ENOMEM;
}
codec->buffer_dma = buffer_dma;
@ -470,20 +471,22 @@ static int hal2_alloc_dmabuf(struct snd_hal2 *hal2, struct hal2_codec *codec)
desc_dma : desc_dma + (i + 1) * sizeof(struct hal2_desc);
desc++;
}
dma_cache_sync(dev, codec->desc, count * sizeof(struct hal2_desc),
DMA_TO_DEVICE);
dma_sync_single_for_device(dev, codec->desc_dma,
count * sizeof(struct hal2_desc),
DMA_BIDIRECTIONAL);
codec->desc_count = count;
return 0;
}
static void hal2_free_dmabuf(struct snd_hal2 *hal2, struct hal2_codec *codec)
static void hal2_free_dmabuf(struct snd_hal2 *hal2, struct hal2_codec *codec,
enum dma_data_direction buffer_dir)
{
struct device *dev = hal2->card->dev;
dma_free_attrs(dev, codec->desc_count * sizeof(struct hal2_desc),
codec->desc, codec->desc_dma, DMA_ATTR_NON_CONSISTENT);
dma_free_attrs(dev, H2_BUF_SIZE, codec->buffer, codec->buffer_dma,
DMA_ATTR_NON_CONSISTENT);
dma_free_noncoherent(dev, codec->desc_count * sizeof(struct hal2_desc),
codec->desc, codec->desc_dma, DMA_BIDIRECTIONAL);
dma_free_noncoherent(dev, H2_BUF_SIZE, codec->buffer, codec->buffer_dma,
buffer_dir);
}
static const struct snd_pcm_hardware hal2_pcm_hw = {
@ -509,21 +512,16 @@ static int hal2_playback_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
int err;
runtime->hw = hal2_pcm_hw;
err = hal2_alloc_dmabuf(hal2, &hal2->dac);
if (err)
return err;
return 0;
return hal2_alloc_dmabuf(hal2, &hal2->dac, DMA_TO_DEVICE);
}
static int hal2_playback_close(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
hal2_free_dmabuf(hal2, &hal2->dac);
hal2_free_dmabuf(hal2, &hal2->dac, DMA_TO_DEVICE);
return 0;
}
@ -579,7 +577,9 @@ static void hal2_playback_transfer(struct snd_pcm_substream *substream,
unsigned char *buf = hal2->dac.buffer + rec->hw_data;
memcpy(buf, substream->runtime->dma_area + rec->sw_data, bytes);
dma_cache_sync(hal2->card->dev, buf, bytes, DMA_TO_DEVICE);
dma_sync_single_for_device(hal2->card->dev,
hal2->dac.buffer_dma + rec->hw_data, bytes,
DMA_TO_DEVICE);
}
@ -597,22 +597,16 @@ static int hal2_capture_open(struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
struct hal2_codec *adc = &hal2->adc;
int err;
runtime->hw = hal2_pcm_hw;
err = hal2_alloc_dmabuf(hal2, adc);
if (err)
return err;
return 0;
return hal2_alloc_dmabuf(hal2, &hal2->adc, DMA_FROM_DEVICE);
}
static int hal2_capture_close(struct snd_pcm_substream *substream)
{
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
hal2_free_dmabuf(hal2, &hal2->adc);
hal2_free_dmabuf(hal2, &hal2->adc, DMA_FROM_DEVICE);
return 0;
}
@ -667,7 +661,9 @@ static void hal2_capture_transfer(struct snd_pcm_substream *substream,
struct snd_hal2 *hal2 = snd_pcm_substream_chip(substream);
unsigned char *buf = hal2->adc.buffer + rec->hw_data;
dma_cache_sync(hal2->card->dev, buf, bytes, DMA_FROM_DEVICE);
dma_sync_single_for_cpu(hal2->card->dev,
hal2->adc.buffer_dma + rec->hw_data, bytes,
DMA_FROM_DEVICE);
memcpy(substream->runtime->dma_area + rec->sw_data, buf, bytes);
}