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b190447e0f
Define an in-kernel API for adding and removing compression modes, which can be used by kernel modules or other kernel code that implements IAA compression modes. Also add a separate file, iaa_crypto_comp_fixed.c, containing huffman tables generated for the IAA 'fixed' compression mode. Future compression modes can be added in a similar fashion. One or more crypto compression algorithms will be created for each compression mode, each of which can be selected as the compression algorithm to be used by a particular facility. Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
123 lines
2.7 KiB
C
123 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright(c) 2021 Intel Corporation. All rights rsvd. */
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#ifndef __IAA_CRYPTO_H__
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#define __IAA_CRYPTO_H__
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#include <linux/crypto.h>
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#include <linux/idxd.h>
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#include <uapi/linux/idxd.h>
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#define IDXD_SUBDRIVER_NAME "crypto"
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#define IAA_COMP_MODES_MAX 2
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#define FIXED_HDR 0x2
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#define FIXED_HDR_SIZE 3
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/* Representation of IAA workqueue */
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struct iaa_wq {
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struct list_head list;
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struct idxd_wq *wq;
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struct iaa_device *iaa_device;
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};
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struct iaa_device_compression_mode {
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const char *name;
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struct aecs_comp_table_record *aecs_comp_table;
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struct aecs_decomp_table_record *aecs_decomp_table;
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dma_addr_t aecs_comp_table_dma_addr;
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dma_addr_t aecs_decomp_table_dma_addr;
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};
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/* Representation of IAA device with wqs, populated by probe */
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struct iaa_device {
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struct list_head list;
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struct idxd_device *idxd;
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struct iaa_device_compression_mode *compression_modes[IAA_COMP_MODES_MAX];
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int n_wq;
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struct list_head wqs;
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};
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struct wq_table_entry {
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struct idxd_wq **wqs;
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int max_wqs;
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int n_wqs;
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int cur_wq;
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};
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#define IAA_AECS_ALIGN 32
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/*
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* Analytics Engine Configuration and State (AECS) contains parameters and
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* internal state of the analytics engine.
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*/
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struct aecs_comp_table_record {
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u32 crc;
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u32 xor_checksum;
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u32 reserved0[5];
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u32 num_output_accum_bits;
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u8 output_accum[256];
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u32 ll_sym[286];
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u32 reserved1;
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u32 reserved2;
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u32 d_sym[30];
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u32 reserved_padding[2];
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} __packed;
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/* AECS for decompress */
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struct aecs_decomp_table_record {
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u32 crc;
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u32 xor_checksum;
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u32 low_filter_param;
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u32 high_filter_param;
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u32 output_mod_idx;
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u32 drop_init_decomp_out_bytes;
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u32 reserved[36];
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u32 output_accum_data[2];
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u32 out_bits_valid;
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u32 bit_off_indexing;
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u32 input_accum_data[64];
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u8 size_qw[32];
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u32 decomp_state[1220];
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} __packed;
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int iaa_aecs_init_fixed(void);
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void iaa_aecs_cleanup_fixed(void);
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typedef int (*iaa_dev_comp_init_fn_t) (struct iaa_device_compression_mode *mode);
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typedef int (*iaa_dev_comp_free_fn_t) (struct iaa_device_compression_mode *mode);
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struct iaa_compression_mode {
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const char *name;
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u32 *ll_table;
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int ll_table_size;
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u32 *d_table;
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int d_table_size;
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u32 *header_table;
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int header_table_size;
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u16 gen_decomp_table_flags;
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iaa_dev_comp_init_fn_t init;
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iaa_dev_comp_free_fn_t free;
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};
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int add_iaa_compression_mode(const char *name,
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const u32 *ll_table,
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int ll_table_size,
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const u32 *d_table,
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int d_table_size,
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const u8 *header_table,
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int header_table_size,
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u16 gen_decomp_table_flags,
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iaa_dev_comp_init_fn_t init,
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iaa_dev_comp_free_fn_t free);
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void remove_iaa_compression_mode(const char *name);
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#endif
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