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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/crypto/caam/sg_sw_sec4.h | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | drivers/crypto/caam/sg_sw_sec4.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/drivers/crypto/caam/sg_sw_sec4.h b/drivers/crypto/caam/sg_sw_sec4.h new file mode 100644 index 000000000..07e1ee992 --- /dev/null +++ b/drivers/crypto/caam/sg_sw_sec4.h @@ -0,0 +1,85 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * CAAM/SEC 4.x functions for using scatterlists in caam driver + * + * Copyright 2008-2011 Freescale Semiconductor, Inc. + * + */ + +#ifndef _SG_SW_SEC4_H_ +#define _SG_SW_SEC4_H_ + +#include "ctrl.h" +#include "regs.h" +#include "sg_sw_qm2.h" +#include <soc/fsl/dpaa2-fd.h> + +struct sec4_sg_entry { + u64 ptr; + u32 len; + u32 bpid_offset; +}; + +/* + * convert single dma address to h/w link table format + */ +static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr, + dma_addr_t dma, u32 len, u16 offset) +{ + if (caam_dpaa2) { + dma_to_qm_sg_one((struct dpaa2_sg_entry *)sec4_sg_ptr, dma, len, + offset); + } else { + sec4_sg_ptr->ptr = cpu_to_caam_dma64(dma); + sec4_sg_ptr->len = cpu_to_caam32(len); + sec4_sg_ptr->bpid_offset = cpu_to_caam32(offset & + SEC4_SG_OFFSET_MASK); + } + + print_hex_dump_debug("sec4_sg_ptr@: ", DUMP_PREFIX_ADDRESS, 16, 4, + sec4_sg_ptr, sizeof(struct sec4_sg_entry), 1); +} + +/* + * convert scatterlist to h/w link table format + * but does not have final bit; instead, returns last entry + */ +static inline struct sec4_sg_entry * +sg_to_sec4_sg(struct scatterlist *sg, int len, + struct sec4_sg_entry *sec4_sg_ptr, u16 offset) +{ + int ent_len; + + while (len) { + ent_len = min_t(int, sg_dma_len(sg), len); + + dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), ent_len, + offset); + sec4_sg_ptr++; + sg = sg_next(sg); + len -= ent_len; + } + return sec4_sg_ptr - 1; +} + +static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr) +{ + if (caam_dpaa2) + dpaa2_sg_set_final((struct dpaa2_sg_entry *)sec4_sg_ptr, true); + else + sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN); +} + +/* + * convert scatterlist to h/w link table format + * scatterlist must have been previously dma mapped + */ +static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int len, + struct sec4_sg_entry *sec4_sg_ptr, + u16 offset) +{ + sec4_sg_ptr = sg_to_sec4_sg(sg, len, sec4_sg_ptr, offset); + sg_to_sec4_set_last(sec4_sg_ptr); +} + +#endif /* _SG_SW_SEC4_H_ */ |