From: Hans Verkuil <hans.verkuil@xxxxxxxxx>
The alsa driver uses videobuf low-level functions that are not
available in vb2, so replace them by driver-specific functions.
Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
---
drivers/media/pci/cx88/cx88-alsa.c | 107 ++++++++++++++++++++++++++++++-------
1 file changed, 89 insertions(+), 18 deletions(-)
diff --git a/drivers/media/pci/cx88/cx88-alsa.c b/drivers/media/pci/cx88/cx88-alsa.c
index a72579a..73021a2 100644
--- a/drivers/media/pci/cx88/cx88-alsa.c
+++ b/drivers/media/pci/cx88/cx88-alsa.c
@@ -62,7 +62,10 @@
struct cx88_audio_buffer {
unsigned int bpl;
struct btcx_riscmem risc;
- struct videobuf_dmabuf dma;
+ void *vaddr;
+ struct scatterlist *sglist;
+ int sglen;
+ int nr_pages;
};
struct cx88_audio_dev {
@@ -84,8 +87,6 @@ struct cx88_audio_dev {
unsigned int period_size;
unsigned int num_periods;
- struct videobuf_dmabuf *dma_risc;
-
struct cx88_audio_buffer *buf;
struct snd_pcm_substream *substream;
@@ -290,19 +291,94 @@ static irqreturn_t cx8801_irq(int irq, void *dev_id)
return IRQ_RETVAL(handled);
}
+static int cx88_alsa_dma_init(struct cx88_audio_dev *chip, int nr_pages)
+{
+ struct cx88_audio_buffer *buf = chip->buf;
+ struct page *pg;
+ int i;
+
+ buf->vaddr = vmalloc_32(nr_pages << PAGE_SHIFT);
+ if (NULL == buf->vaddr) {
+ dprintk(1, "vmalloc_32(%d pages) failed\n", nr_pages);
+ return -ENOMEM;
+ }
+
+ dprintk(1, "vmalloc is at addr 0x%08lx, size=%d\n",
+ (unsigned long)buf->vaddr,
+ nr_pages << PAGE_SHIFT);
+
+ memset(buf->vaddr, 0, nr_pages << PAGE_SHIFT);
+ buf->nr_pages = nr_pages;
+
+ buf->sglist = vzalloc(buf->nr_pages * sizeof(*buf->sglist));
+ if (NULL == buf->sglist)
+ goto vzalloc_err;
+
+ sg_init_table(buf->sglist, buf->nr_pages);
+ for (i = 0; i < buf->nr_pages; i++) {
+ pg = vmalloc_to_page(buf->vaddr + i * PAGE_SIZE);
+ if (NULL == pg)
+ goto vmalloc_to_page_err;
+ sg_set_page(&buf->sglist[i], pg, PAGE_SIZE, 0);
+ }
+ return 0;
+
+vmalloc_to_page_err:
+ vfree(buf->sglist);
+ buf->sglist = NULL;
+vzalloc_err:
+ vfree(buf->vaddr);
+ buf->vaddr = NULL;
+ return -ENOMEM;
+}
+
+static int cx88_alsa_dma_map(struct cx88_audio_dev *dev)
+{
+ struct cx88_audio_buffer *buf = dev->buf;
+
+ buf->sglen = dma_map_sg(&dev->pci->dev, buf->sglist,
+ buf->nr_pages, PCI_DMA_FROMDEVICE);
+
+ if (0 == buf->sglen) {
+ pr_warn("%s: cx88_alsa_map_sg failed\n", __func__);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static int cx88_alsa_dma_unmap(struct cx88_audio_dev *dev)
+{
+ struct cx88_audio_buffer *buf = dev->buf;
+
+ if (!buf->sglen)
+ return 0;
+
+ dma_unmap_sg(&dev->pci->dev, buf->sglist, buf->sglen, PCI_DMA_FROMDEVICE);
+ buf->sglen = 0;
+ return 0;
+}
+
+static int cx88_alsa_dma_free(struct cx88_audio_buffer *buf)
+{
+ vfree(buf->sglist);
+ buf->sglist = NULL;
+ vfree(buf->vaddr);
+ buf->vaddr = NULL;
+ return 0;
+}
+
static int dsp_buffer_free(snd_cx88_card_t *chip)
{
BUG_ON(!chip->dma_size);
dprintk(2,"Freeing buffer\n");
- videobuf_dma_unmap(&chip->pci->dev, chip->dma_risc);
- videobuf_dma_free(chip->dma_risc);
- btcx_riscmem_free(chip->pci,&chip->buf->risc);
+ cx88_alsa_dma_unmap(chip);
+ cx88_alsa_dma_free(chip->buf);
+ btcx_riscmem_free(chip->pci, &chip->buf->risc);
kfree(chip->buf);
- chip->dma_risc = NULL;
- chip->dma_size = 0;
+ chip->buf = NULL;
return 0;
}
@@ -387,7 +463,6 @@ static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
struct snd_pcm_hw_params * hw_params)
{
snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
- struct videobuf_dmabuf *dma;
struct cx88_audio_buffer *buf;
int ret;
@@ -408,20 +483,19 @@ static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
if (NULL == buf)
return -ENOMEM;
+ chip->buf = buf;
buf->bpl = chip->period_size;
- dma = &buf->dma;
- videobuf_dma_init(dma);
- ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
+ ret = cx88_alsa_dma_init(chip,
(PAGE_ALIGN(chip->dma_size) >> PAGE_SHIFT));
if (ret < 0)
goto error;
- ret = videobuf_dma_map(&chip->pci->dev, dma);
+ ret = cx88_alsa_dma_map(chip);
if (ret < 0)
goto error;
- ret = cx88_risc_databuffer(chip->pci, &buf->risc, dma->sglist,
+ ret = cx88_risc_databuffer(chip->pci, &buf->risc, buf->sglist,
chip->period_size, chip->num_periods, 1);
if (ret < 0)
goto error;
@@ -430,10 +504,7 @@ static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC);
buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
- chip->buf = buf;
- chip->dma_risc = dma;
-
- substream->runtime->dma_area = chip->dma_risc->vaddr;
+ substream->runtime->dma_area = chip->buf->vaddr;
substream->runtime->dma_bytes = chip->dma_size;
substream->runtime->dma_addr = 0;
return 0;
--
2.1.0
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