mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-07 00:38:05 -04:00
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
/*
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* drivers/media/m2m1shot-helper.c
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*
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* Copyright (C) 2014 Samsung Electronics Co., Ltd.
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*
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* Contact: Cho KyongHo <pullip.cho@samsung.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <linux/kernel.h>
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#include <linux/exynos_iovmm.h>
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#include <linux/exynos_ion.h>
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#include <media/m2m1shot-helper.h>
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int m2m1shot_map_dma_buf(struct device *dev,
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struct m2m1shot_buffer_plane_dma *plane,
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enum dma_data_direction dir)
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{
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if (plane->dmabuf) {
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plane->sgt = dma_buf_map_attachment(plane->attachment, dir);
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if (IS_ERR(plane->sgt)) {
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dev_err(dev, "%s: failed to map attacment of dma_buf\n",
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__func__);
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return PTR_ERR(plane->sgt);
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}
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exynos_ion_sync_dmabuf_for_device(dev, plane->dmabuf,
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plane->bytes_used, dir);
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} else { /* userptr */
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exynos_ion_sync_sg_for_device(dev, plane->bytes_used,
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plane->sgt, dir);
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}
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return 0;
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}
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EXPORT_SYMBOL(m2m1shot_map_dma_buf);
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void m2m1shot_unmap_dma_buf(struct device *dev,
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struct m2m1shot_buffer_plane_dma *plane,
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enum dma_data_direction dir)
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{
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if (plane->dmabuf) {
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exynos_ion_sync_dmabuf_for_cpu(dev, plane->dmabuf,
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plane->bytes_used, dir);
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dma_buf_unmap_attachment(plane->attachment, plane->sgt, dir);
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} else {
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exynos_ion_sync_sg_for_cpu(dev, plane->bytes_used,
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plane->sgt, dir);
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}
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}
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EXPORT_SYMBOL(m2m1shot_unmap_dma_buf);
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int m2m1shot_dma_addr_map(struct device *dev,
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struct m2m1shot_buffer_dma *buf,
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int plane_idx, enum dma_data_direction dir)
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{
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struct m2m1shot_buffer_plane_dma *plane = &buf->plane[plane_idx];
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dma_addr_t iova;
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if (plane->dmabuf) {
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iova = ion_iovmm_map(plane->attachment, 0,
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plane->bytes_used, dir, 0);
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} else {
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iova = iovmm_map(dev, plane->sgt->sgl, 0,
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plane->bytes_used, dir, 0);
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}
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if (IS_ERR_VALUE(iova))
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return (int)iova;
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buf->plane[plane_idx].dma_addr = iova + plane->offset;
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return 0;
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}
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void m2m1shot_dma_addr_unmap(struct device *dev,
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struct m2m1shot_buffer_dma *buf, int plane_idx)
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{
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struct m2m1shot_buffer_plane_dma *plane = &buf->plane[plane_idx];
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dma_addr_t dma_addr = plane->dma_addr - plane->offset;
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if (plane->dmabuf)
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ion_iovmm_unmap(plane->attachment, dma_addr);
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else
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iovmm_unmap(dev, dma_addr);
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plane->dma_addr = 0;
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}
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