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c1e98807b7
Extend qat_bl_sgl_to_bufl() to allow skipping the mapping of a region of the source and the destination scatter lists starting from byte zero. This is to support the ZLIB format (RFC 1950) in the qat driver. The ZLIB format is made of deflate compressed data surrounded by a header and a footer. The QAT accelerators support only the deflate algorithm, therefore the header should not be mapped since it is inserted in software. Signed-off-by: Lucas Segarra Fernandez <lucas.segarra.fernandez@intel.com> Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/* Copyright(c) 2014 - 2022 Intel Corporation */
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#ifndef QAT_BL_H
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#define QAT_BL_H
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#include <linux/crypto.h>
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#include <linux/scatterlist.h>
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#include <linux/types.h>
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#define QAT_MAX_BUFF_DESC 4
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struct qat_alg_buf {
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u32 len;
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u32 resrvd;
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u64 addr;
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} __packed;
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struct qat_alg_buf_list {
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u64 resrvd;
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u32 num_bufs;
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u32 num_mapped_bufs;
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struct qat_alg_buf buffers[];
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} __packed;
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struct qat_alg_fixed_buf_list {
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struct qat_alg_buf_list sgl_hdr;
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struct qat_alg_buf descriptors[QAT_MAX_BUFF_DESC];
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} __packed __aligned(64);
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struct qat_request_buffs {
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struct qat_alg_buf_list *bl;
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dma_addr_t blp;
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struct qat_alg_buf_list *blout;
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dma_addr_t bloutp;
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size_t sz;
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size_t sz_out;
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bool sgl_src_valid;
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bool sgl_dst_valid;
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struct qat_alg_fixed_buf_list sgl_src;
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struct qat_alg_fixed_buf_list sgl_dst;
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};
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struct qat_sgl_to_bufl_params {
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dma_addr_t extra_dst_buff;
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size_t sz_extra_dst_buff;
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unsigned int sskip;
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unsigned int dskip;
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};
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void qat_bl_free_bufl(struct adf_accel_dev *accel_dev,
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struct qat_request_buffs *buf);
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int qat_bl_sgl_to_bufl(struct adf_accel_dev *accel_dev,
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struct scatterlist *sgl,
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struct scatterlist *sglout,
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struct qat_request_buffs *buf,
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struct qat_sgl_to_bufl_params *params,
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gfp_t flags);
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static inline gfp_t qat_algs_alloc_flags(struct crypto_async_request *req)
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{
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return req->flags & CRYPTO_TFM_REQ_MAY_SLEEP ? GFP_KERNEL : GFP_ATOMIC;
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}
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int qat_bl_realloc_map_new_dst(struct adf_accel_dev *accel_dev,
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struct scatterlist **newd,
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unsigned int dlen,
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struct qat_request_buffs *qat_bufs,
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gfp_t gfp);
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#endif
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