Add two more helpers for copying memory between sockptr and iomem,
which will be used by the new PCM copy ops in a few drivers.
It's just bridging to the existing helpers.
Signed-off-by: Takashi Iwai <tiwai@xxxxxxx>
---
include/sound/pcm.h | 4 ++++
sound/core/memory.c | 39 +++++++++++++++++++++++++++++++++++++++
2 files changed, 43 insertions(+)
diff --git a/include/sound/pcm.h b/include/sound/pcm.h
index 04b935200d0e..9b7054f0cea0 100644
--- a/include/sound/pcm.h
+++ b/include/sound/pcm.h
@@ -1559,6 +1559,10 @@ 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 sockptr and iomem */
+int copy_to_sockptr_fromio(sockptr_t dst, const void __iomem *src, size_t count);
+int copy_from_sockptr_toio(void __iomem *dst, sockptr_t src, size_t count);
+
struct snd_pcm_status64 {
snd_pcm_state_t state; /* stream state */
u8 rsvd[4];
diff --git a/sound/core/memory.c b/sound/core/memory.c
index 5d894dc32f7d..ff4a9e0064a2 100644
--- a/sound/core/memory.c
+++ b/sound/core/memory.c
@@ -9,6 +9,7 @@
#include <linux/io.h>
#include <linux/uaccess.h>
#include <sound/core.h>
+#include <sound/pcm.h>
/**
* copy_to_user_fromio - copy data from mmio-space to user-space
@@ -73,3 +74,41 @@ int copy_from_user_toio(volatile void __iomem *dst, const void __user *src, size
#endif
}
EXPORT_SYMBOL(copy_from_user_toio);
+
+/**
+ * copy_to_sockptr_fromio - copy data from mmio-space to sockptr
+ * @dst: the destination pointer
+ * @src: the source pointer on mmio
+ * @count: the data size to copy in bytes
+ *
+ * Copies the data from mmio-space to the generic pointer address
+ *
+ * Return: Zero if successful, or -EFAULT on failure
+ */
+int copy_to_sockptr_fromio(sockptr_t dst, const void __iomem *src, size_t count)
+{
+ if (!sockptr_is_kernel(dst))
+ return copy_to_user_fromio(dst.user, src, count);
+ memcpy_fromio(dst.kernel, src, count);
+ return 0;
+}
+EXPORT_SYMBOL(copy_to_sockptr_fromio);
+
+/**
+ * copy_from_sockptr_toio - copy data from sockptr to mmio-space
+ * @dst: the destination pointer on mmio-space
+ * @src: the source pointer
+ * @count: the data size to copy in bytes
+ *
+ * Copies the data from the generic pointer address to mmio-space.
+ *
+ * Return: Zero if successful, or -EFAULT on failure
+ */
+int copy_from_sockptr_toio(void __iomem *dst, sockptr_t src, size_t count)
+{
+ if (!sockptr_is_kernel(src))
+ return copy_from_user_toio(dst, src.user, count);
+ memcpy_toio(dst, src.kernel, count);
+ return 0;
+}
+EXPORT_SYMBOL(copy_from_sockptr_toio);
--
2.35.3
