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From:   Benjamin Gaignard <benjamin.gaignard@collabora.com>
To:     ezequiel@collabora.com, p.zabel@pengutronix.de, mchehab@kernel.org,
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Cc:     linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org,
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        Benjamin Gaignard <benjamin.gaignard@collabora.com>
Subject: [PATCH v1 11/18] media: hantro: Add helper function for auxiliary buffers allocation
Date:   Wed, 17 Feb 2021 09:02:59 +0100
Message-Id: <20210217080306.157876-12-benjamin.gaignard@collabora.com>
In-Reply-To: <20210217080306.157876-1-benjamin.gaignard@collabora.com>
References: <20210217080306.157876-1-benjamin.gaignard@collabora.com>
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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@collabora.com>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Adrian Ratiu <adrian.ratiu@collabora.com>
---
 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