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Commit 24efd2a6 authored by Vikram Panduranga's avatar Vikram Panduranga
Browse files

dsp: add dma map resource cmd 



Add a new API for mapping DMA resources
that needs to be attached to existing
SMMU SID.

Change-Id: I7a513d24ea30a5ead318e856e4c5317743fd0021
Signed-off-by: default avatarVikram Panduranga <vpandura@codeaurora.org>
parent a27b0c32

dsp/msm_audio_ion.c

+38 −1
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (c) 2013-2018, The Linux Foundation. All rights reserved.

 * Copyright (c) 2013-2019, The Linux Foundation. All rights reserved.

 */



#include <linux/init.h>
@@ -400,6 +400,43 @@ int msm_audio_ion_alloc(struct dma_buf **dma_buf, size_t bufsz, 
}

EXPORT_SYMBOL(msm_audio_ion_alloc);



/**

 * msm_audio_ion_dma_map -

 *        Memory maps for a given DMA buffer

 *

 * @phys_addr: Physical address of DMA buffer to be mapped

 * @iova_base: IOVA address of memory mapped DMA buffer

 * @size: buffer size

 * @dir: DMA direction

 * Returns 0 on success or error on failure

 */

int msm_audio_ion_dma_map(dma_addr_t *phys_addr, dma_addr_t *iova_base,

			u32 size, enum dma_data_direction dir)

{

	dma_addr_t iova;

	struct device *cb_dev = msm_audio_ion_data.cb_dev;



	if (!phys_addr || !iova_base || !size)

		return -EINVAL;



	iova = dma_map_resource(cb_dev, *phys_addr, size,

				dir, 0);

	if (dma_mapping_error(cb_dev, iova)) {

		pr_err("%s: dma_mapping_error\n", __func__);

		return -EIO;

	}

	pr_debug("%s: dma_mapping_success iova:0x%lx\n", __func__,

			 (unsigned long)iova);

	if (msm_audio_ion_data.smmu_enabled)

		/* Append the SMMU SID information to the IOVA address */

		iova |= msm_audio_ion_data.smmu_sid_bits;



	*iova_base = iova;



	return 0;

}

EXPORT_SYMBOL(msm_audio_ion_dma_map);



/**

 * msm_audio_ion_import-

 *        Import ION buffer with given file descriptor

include/dsp/msm_audio_ion.h

+5 −1
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (c) 2013-2015, 2017-2018, The Linux Foundation. All rights reserved.

 * Copyright (c) 2013-2015, 2017-2019, The Linux Foundation. All rights reserved.

 */



#ifndef _LINUX_MSM_AUDIO_ION_H
@@ -8,6 +8,7 @@ 
#include <dsp/q6asm-v2.h>

#include <sound/pcm.h>

#include <linux/msm_ion.h>

#include <linux/dma-mapping.h>



enum {

	MSM_AUDIO_ION_INV_CACHES = 0,
@@ -26,4 +27,7 @@ int msm_audio_ion_cache_operations(struct audio_buffer *abuff, int cache_op); 


u32 msm_audio_populate_upper_32_bits(dma_addr_t pa);

int msm_audio_ion_get_smmu_info(struct device **cb_dev, u64 *smmu_sid);



int msm_audio_ion_dma_map(dma_addr_t *phys_addr, dma_addr_t *iova_base,

			u32 size, enum dma_data_direction dir);

#endif /* _LINUX_MSM_AUDIO_ION_H */