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// SPDX-License-Identifier: GPL-2.0-only
/* Copyright(c) 2014 - 2022 Intel Corporation */
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/pci.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#include <linux/types.h>
#include "adf_accel_devices.h"
#include "qat_bl.h"
#include "qat_crypto.h"
void qat_bl_free_bufl(struct adf_accel_dev *accel_dev,
struct qat_request_buffs *buf)
{
struct device *dev = &GET_DEV(accel_dev);
struct qat_alg_buf_list *bl = buf->bl;
struct qat_alg_buf_list *blout = buf->blout;
dma_addr_t blp = buf->blp;
dma_addr_t blpout = buf->bloutp;
size_t sz = buf->sz;
size_t sz_out = buf->sz_out;
int bl_dma_dir;
int i;
bl_dma_dir = blp != blpout ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
for (i = 0; i < bl->num_bufs; i++)
dma_unmap_single(dev, bl->bufers[i].addr,
bl->bufers[i].len, bl_dma_dir);
dma_unmap_single(dev, blp, sz, DMA_TO_DEVICE);
if (!buf->sgl_src_valid)
kfree(bl);
if (blp != blpout) {
/* If out of place operation dma unmap only data */
int bufless = blout->num_bufs - blout->num_mapped_bufs;
for (i = bufless; i < blout->num_bufs; i++) {
dma_unmap_single(dev, blout->bufers[i].addr,
blout->bufers[i].len,
DMA_FROM_DEVICE);
}
dma_unmap_single(dev, blpout, sz_out, DMA_TO_DEVICE);
if (!buf->sgl_dst_valid)
kfree(blout);
}
}
int qat_bl_sgl_to_bufl(struct adf_accel_dev *accel_dev,
struct scatterlist *sgl,
struct scatterlist *sglout,
struct qat_request_buffs *buf,
gfp_t flags)
{
struct device *dev = &GET_DEV(accel_dev);
int i, sg_nctr = 0;
int n = sg_nents(sgl);
struct qat_alg_buf_list *bufl;
struct qat_alg_buf_list *buflout = NULL;
dma_addr_t blp = DMA_MAPPING_ERROR;
dma_addr_t bloutp = DMA_MAPPING_ERROR;
struct scatterlist *sg;
size_t sz_out, sz = struct_size(bufl, bufers, n);
int node = dev_to_node(&GET_DEV(accel_dev));
int bufl_dma_dir;
if (unlikely(!n))
return -EINVAL;
buf->sgl_src_valid = false;
buf->sgl_dst_valid = false;
if (n > QAT_MAX_BUFF_DESC) {
bufl = kzalloc_node(sz, flags, node);
if (unlikely(!bufl))
return -ENOMEM;
} else {
bufl = &buf->sgl_src.sgl_hdr;
memset(bufl, 0, sizeof(struct qat_alg_buf_list));
buf->sgl_src_valid = true;
}
bufl_dma_dir = sgl != sglout ? DMA_TO_DEVICE : DMA_BIDIRECTIONAL;
for_each_sg(sgl, sg, n, i)
bufl->bufers[i].addr = DMA_MAPPING_ERROR;
for_each_sg(sgl, sg, n, i) {
int y = sg_nctr;
if (!sg->length)
continue;
bufl->bufers[y].addr = dma_map_single(dev, sg_virt(sg),
sg->length,
bufl_dma_dir);
bufl->bufers[y].len = sg->length;
if (unlikely(dma_mapping_error(dev, bufl->bufers[y].addr)))
goto err_in;
sg_nctr++;
}
bufl->num_bufs = sg_nctr;
blp = dma_map_single(dev, bufl, sz, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dev, blp)))
goto err_in;
buf->bl = bufl;
buf->blp = blp;
buf->sz = sz;
/* Handle out of place operation */
if (sgl != sglout) {
struct qat_alg_buf *bufers;
n = sg_nents(sglout);
sz_out = struct_size(buflout, bufers, n);
sg_nctr = 0;
if (n > QAT_MAX_BUFF_DESC) {
buflout = kzalloc_node(sz_out, flags, node);
if (unlikely(!buflout))
goto err_in;
} else {
buflout = &buf->sgl_dst.sgl_hdr;
memset(buflout, 0, sizeof(struct qat_alg_buf_list));
buf->sgl_dst_valid = true;
}
bufers = buflout->bufers;
for_each_sg(sglout, sg, n, i)
bufers[i].addr = DMA_MAPPING_ERROR;
for_each_sg(sglout, sg, n, i) {
int y = sg_nctr;
if (!sg->length)
continue;
bufers[y].addr = dma_map_single(dev, sg_virt(sg),
sg->length,
DMA_FROM_DEVICE);
if (unlikely(dma_mapping_error(dev, bufers[y].addr)))
goto err_out;
bufers[y].len = sg->length;
sg_nctr++;
}
buflout->num_bufs = sg_nctr;
buflout->num_mapped_bufs = sg_nctr;
bloutp = dma_map_single(dev, buflout, sz_out, DMA_TO_DEVICE);
if (unlikely(dma_mapping_error(dev, bloutp)))
goto err_out;
buf->blout = buflout;
buf->bloutp = bloutp;
buf->sz_out = sz_out;
} else {
/* Otherwise set the src and dst to the same address */
buf->bloutp = buf->blp;
buf->sz_out = 0;
}
return 0;
err_out:
if (!dma_mapping_error(dev, bloutp))
dma_unmap_single(dev, bloutp, sz_out, DMA_TO_DEVICE);
n = sg_nents(sglout);
for (i = 0; i < n; i++)
if (!dma_mapping_error(dev, buflout->bufers[i].addr))
dma_unmap_single(dev, buflout->bufers[i].addr,
buflout->bufers[i].len,
DMA_FROM_DEVICE);
if (!buf->sgl_dst_valid)
kfree(buflout);
err_in:
if (!dma_mapping_error(dev, blp))
dma_unmap_single(dev, blp, sz, DMA_TO_DEVICE);
n = sg_nents(sgl);
for (i = 0; i < n; i++)
if (!dma_mapping_error(dev, bufl->bufers[i].addr))
dma_unmap_single(dev, bufl->bufers[i].addr,
bufl->bufers[i].len,
bufl_dma_dir);
if (!buf->sgl_src_valid)
kfree(bufl);
dev_err(dev, "Failed to map buf for dma\n");
return -ENOMEM;
}
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