[PATCH v1 11/18] media: hantro: Add helper function for auxiliary buffers allocation

[Benjamin Gaignard]

Add helper functions to allocate and free auxiliary buffers.
These buffers aren't for frames but are needed by the hardware
to store scaling matrix, tiles size, border filters etc...

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>
Signed-off-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
Signed-off-by: Adrian Ratiu <adrian.ratiu@xxxxxxxxxxxxx>
---
 drivers/staging/media/hantro/hantro.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/staging/media/hantro/hantro.h b/drivers/staging/media/hantro/hantro.h
index a9b80b2c9124..7f842edbc341 100644
--- a/drivers/staging/media/hantro/hantro.h
+++ b/drivers/staging/media/hantro/hantro.h
@@ -446,6 +446,30 @@ hantro_get_dec_buf(struct hantro_ctx *ctx, struct vb2_buffer *vb)
 	return vb2_plane_vaddr(vb, 0);
 }
 
+static inline int
+hantro_aux_buf_alloc(struct hantro_dev *vpu,
+		     struct hantro_aux_buf *buf, size_t size)
+{
+	buf->cpu = dma_alloc_coherent(vpu->dev, size, &buf->dma, GFP_KERNEL);
+	if (!buf->cpu)
+		return -ENOMEM;
+
+	buf->size = size;
+	return 0;
+}
+
+static inline void
+hantro_aux_buf_free(struct hantro_dev *vpu,
+		    struct hantro_aux_buf *buf)
+{
+	if (buf->cpu)
+		dma_free_coherent(vpu->dev, buf->size, buf->cpu, buf->dma);
+
+	buf->cpu = NULL;
+	buf->dma = 0;
+	buf->size = 0;
+}
+
 void hantro_postproc_disable(struct hantro_ctx *ctx);
 void hantro_postproc_enable(struct hantro_ctx *ctx);
 void hantro_postproc_free(struct hantro_ctx *ctx);
-- 
2.25.1