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