cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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sg_sw_sec4.h (2055B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * CAAM/SEC 4.x functions for using scatterlists in caam driver
      4 *
      5 * Copyright 2008-2011 Freescale Semiconductor, Inc.
      6 *
      7 */
      8
      9#ifndef _SG_SW_SEC4_H_
     10#define _SG_SW_SEC4_H_
     11
     12#include "ctrl.h"
     13#include "regs.h"
     14#include "sg_sw_qm2.h"
     15#include <soc/fsl/dpaa2-fd.h>
     16
     17struct sec4_sg_entry {
     18	u64 ptr;
     19	u32 len;
     20	u32 bpid_offset;
     21};
     22
     23/*
     24 * convert single dma address to h/w link table format
     25 */
     26static inline void dma_to_sec4_sg_one(struct sec4_sg_entry *sec4_sg_ptr,
     27				      dma_addr_t dma, u32 len, u16 offset)
     28{
     29	if (caam_dpaa2) {
     30		dma_to_qm_sg_one((struct dpaa2_sg_entry *)sec4_sg_ptr, dma, len,
     31				 offset);
     32	} else {
     33		sec4_sg_ptr->ptr = cpu_to_caam_dma64(dma);
     34		sec4_sg_ptr->len = cpu_to_caam32(len);
     35		sec4_sg_ptr->bpid_offset = cpu_to_caam32(offset &
     36							 SEC4_SG_OFFSET_MASK);
     37	}
     38
     39	print_hex_dump_debug("sec4_sg_ptr@: ", DUMP_PREFIX_ADDRESS, 16, 4,
     40			     sec4_sg_ptr, sizeof(struct sec4_sg_entry), 1);
     41}
     42
     43/*
     44 * convert scatterlist to h/w link table format
     45 * but does not have final bit; instead, returns last entry
     46 */
     47static inline struct sec4_sg_entry *
     48sg_to_sec4_sg(struct scatterlist *sg, int len,
     49	      struct sec4_sg_entry *sec4_sg_ptr, u16 offset)
     50{
     51	int ent_len;
     52
     53	while (len) {
     54		ent_len = min_t(int, sg_dma_len(sg), len);
     55
     56		dma_to_sec4_sg_one(sec4_sg_ptr, sg_dma_address(sg), ent_len,
     57				   offset);
     58		sec4_sg_ptr++;
     59		sg = sg_next(sg);
     60		len -= ent_len;
     61	}
     62	return sec4_sg_ptr - 1;
     63}
     64
     65static inline void sg_to_sec4_set_last(struct sec4_sg_entry *sec4_sg_ptr)
     66{
     67	if (caam_dpaa2)
     68		dpaa2_sg_set_final((struct dpaa2_sg_entry *)sec4_sg_ptr, true);
     69	else
     70		sec4_sg_ptr->len |= cpu_to_caam32(SEC4_SG_LEN_FIN);
     71}
     72
     73/*
     74 * convert scatterlist to h/w link table format
     75 * scatterlist must have been previously dma mapped
     76 */
     77static inline void sg_to_sec4_sg_last(struct scatterlist *sg, int len,
     78				      struct sec4_sg_entry *sec4_sg_ptr,
     79				      u16 offset)
     80{
     81	sec4_sg_ptr = sg_to_sec4_sg(sg, len, sec4_sg_ptr, offset);
     82	sg_to_sec4_set_last(sec4_sg_ptr);
     83}
     84
     85#endif /* _SG_SW_SEC4_H_ */