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ASoC: wm_adsp: Use vmalloc to allocate firmware download buffer

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Use vmalloc to allocate the buffer for firmware/coefficient download and
rely on the SPI core to split this up into DMA-able chunks. This should
give better performance and means we no longer need to manually split
the download into page size chunks to avoid allocating overly large
continuous memory regions.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax 2014-11-14 15:40:45 +00:00 committed by Mark Brown
parent f114040e3e
commit cdcd7f7287
1 changed files with 22 additions and 34 deletions
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56
sound/soc/codecs/wm_adsp.c
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@ -21,6 +21,7 @@
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/workqueue.h>
#include <sound/core.h>
#include <sound/pcm.h>
@ -169,11 +170,12 @@ static struct wm_adsp_buf *wm_adsp_buf_alloc(const void *src, size_t len,
if (buf == NULL)
return NULL;
buf->buf = kmemdup(src, len, GFP_KERNEL | GFP_DMA);
buf->buf = vmalloc(len);
if (!buf->buf) {
kfree(buf);
vfree(buf);
return NULL;
}
memcpy(buf->buf, src, len);
if (list)
list_add_tail(&buf->list, list);
@ -188,7 +190,7 @@ static void wm_adsp_buf_free(struct list_head *list)
struct wm_adsp_buf,
list);
list_del(&buf->list);
kfree(buf->buf);
vfree(buf->buf);
kfree(buf);
}
}
@ -684,38 +686,24 @@ static int wm_adsp_load(struct wm_adsp *dsp)
}
if (reg) {
size_t to_write = PAGE_SIZE;
size_t remain = le32_to_cpu(region->len);
const u8 *data = region->data;
buf = wm_adsp_buf_alloc(region->data,
le32_to_cpu(region->len),
&buf_list);
if (!buf) {
adsp_err(dsp, "Out of memory\n");
ret = -ENOMEM;
goto out_fw;
}
while (remain > 0) {
if (remain < PAGE_SIZE)
to_write = remain;
buf = wm_adsp_buf_alloc(data,
to_write,
&buf_list);
if (!buf) {
adsp_err(dsp, "Out of memory\n");
ret = -ENOMEM;
goto out_fw;
}
ret = regmap_raw_write_async(regmap, reg,
buf->buf,
to_write);
if (ret != 0) {
adsp_err(dsp,
"%s.%d: Failed to write %zd bytes at %d in %s: %d\n",
file, regions,
to_write, offset,
region_name, ret);
goto out_fw;
}
data += to_write;
reg += to_write / 2;
remain -= to_write;
ret = regmap_raw_write_async(regmap, reg, buf->buf,
le32_to_cpu(region->len));
if (ret != 0) {
adsp_err(dsp,
"%s.%d: Failed to write %d bytes at %d in %s: %d\n",
file, regions,
le32_to_cpu(region->len), offset,
region_name, ret);
goto out_fw;
}
}