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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
*
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-direction.h>
#include <linux/dma-mapping.h>
#include <linux/firmware.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/mhi.h>
#include <linux/module.h>
#include <linux/random.h>
#include <linux/slab.h>
#include <linux/wait.h>
#include "internal.h"
void mhi_free_bhie_table(struct mhi_controller *mhi_cntrl,
struct image_info *image_info)
{
int i;
struct mhi_buf *mhi_buf = image_info->mhi_buf;
for (i = 0; i < image_info->entries; i++, mhi_buf++)
mhi_free_coherent(mhi_cntrl, mhi_buf->len, mhi_buf->buf,
mhi_buf->dma_addr);
kfree(image_info->mhi_buf);
kfree(image_info);
}
int mhi_alloc_bhie_table(struct mhi_controller *mhi_cntrl,
struct image_info **image_info,
size_t alloc_size)
{
size_t seg_size = mhi_cntrl->seg_len;
int segments = DIV_ROUND_UP(alloc_size, seg_size) + 1;
int i;
struct image_info *img_info;
struct mhi_buf *mhi_buf;
img_info = kzalloc(sizeof(*img_info), GFP_KERNEL);
if (!img_info)
return -ENOMEM;
/* Allocate memory for entries */
img_info->mhi_buf = kcalloc(segments, sizeof(*img_info->mhi_buf),
GFP_KERNEL);
if (!img_info->mhi_buf)
goto error_alloc_mhi_buf;
/* Allocate and populate vector table */
mhi_buf = img_info->mhi_buf;
for (i = 0; i < segments; i++, mhi_buf++) {
size_t vec_size = seg_size;
/* Vector table is the last entry */
if (i == segments - 1)
vec_size = sizeof(struct bhi_vec_entry) * i;
mhi_buf->len = vec_size;
mhi_buf->buf = mhi_alloc_coherent(mhi_cntrl, vec_size,
&mhi_buf->dma_addr,
GFP_KERNEL);
if (!mhi_buf->buf)
goto error_alloc_segment;
}
img_info->bhi_vec = img_info->mhi_buf[segments - 1].buf;
img_info->entries = segments;
*image_info = img_info;
return 0;
error_alloc_segment:
for (--i, --mhi_buf; i >= 0; i--, mhi_buf--)
mhi_free_coherent(mhi_cntrl, mhi_buf->len, mhi_buf->buf,
mhi_buf->dma_addr);
error_alloc_mhi_buf:
kfree(img_info);
return -ENOMEM;
}
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