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| author | Takashi Iwai <tiwai@suse.de> | 2023-08-15 21:01:14 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-08-18 12:18:16 +0200 |
| commit | 561b4fa9c1111292ec975a04ecd8372ac0256e1e (patch) | |
| tree | 06c324a483aeaf35c8bda0c4eafd9901435b32f1 /include/sound/pcm.h | |
| parent | ALSA: pcm: Add copy ops with iov_iter (diff) | |
| download | linux-561b4fa9c1111292ec975a04ecd8372ac0256e1e.tar.xz linux-561b4fa9c1111292ec975a04ecd8372ac0256e1e.zip | |
ALSA: core: Add memory copy helpers between iov_iter and iomem
Add two more helpers for copying memory between iov_iter and iomem,
which will be used by the new PCM copy ops in a few drivers.
The existing helpers became wrappers of those now.
Note that copy_from/to_iter() returns the copied bytes, hence the
error condition is adjusted accordingly.
Link: https://lore.kernel.org/r/20230815190136.8987-4-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'include/sound/pcm.h')
| -rw-r--r-- | include/sound/pcm.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/sound/pcm.h b/include/sound/pcm.h index 6d6ec51ddfc1..1f6df47eb500 100644 --- a/include/sound/pcm.h +++ b/include/sound/pcm.h @@ -1559,6 +1559,11 @@ static inline u64 pcm_format_to_bits(snd_pcm_format_t pcm_format) #define pcm_dbg(pcm, fmt, args...) \ dev_dbg((pcm)->card->dev, fmt, ##args) +/* helpers for copying between iov_iter and iomem */ +int copy_to_iter_fromio(struct iov_iter *itert, const void __iomem *src, + size_t count); +int copy_from_iter_toio(void __iomem *dst, struct iov_iter *iter, size_t count); + struct snd_pcm_status64 { snd_pcm_state_t state; /* stream state */ u8 rsvd[4]; |