mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-19 02:04:19 +08:00
059d73eea6
Currently, conversion of SW S/G table into HW S/G layout relies on nents returned by sg_nents_for_len(sg, len). However this leaves the possibility of HW S/G referencing more data then needed: since buffer length in HW S/G entries is filled using sg_dma_len(sg), the last entry in HW S/G table might have a length that is bigger than needed for the crypto request. This way of S/G table conversion is fine, unless after converting a table more entries have to be appended to the HW S/G table. In this case, crypto engine would access data from the S/G entry having the incorrect length, instead of advancing in the S/G table. This situation doesn't exist, but the upcoming implementation of IV update for skcipher algorithms needs to add a S/G entry after req->dst S/G (corresponding to output IV). Signed-off-by: Horia Geantă <horia.geanta@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
|
|
/*
|
|
* Copyright 2013-2016 Freescale Semiconductor, Inc.
|
|
* Copyright 2016-2017 NXP
|
|
*/
|
|
|
|
#ifndef __SG_SW_QM_H
|
|
#define __SG_SW_QM_H
|
|
|
|
#include <soc/fsl/qman.h>
|
|
#include "regs.h"
|
|
|
|
static inline void __dma_to_qm_sg(struct qm_sg_entry *qm_sg_ptr, dma_addr_t dma,
|
|
u16 offset)
|
|
{
|
|
qm_sg_entry_set64(qm_sg_ptr, dma);
|
|
qm_sg_ptr->__reserved2 = 0;
|
|
qm_sg_ptr->bpid = 0;
|
|
qm_sg_ptr->offset = cpu_to_be16(offset & QM_SG_OFF_MASK);
|
|
}
|
|
|
|
static inline void dma_to_qm_sg_one(struct qm_sg_entry *qm_sg_ptr,
|
|
dma_addr_t dma, u32 len, u16 offset)
|
|
{
|
|
__dma_to_qm_sg(qm_sg_ptr, dma, offset);
|
|
qm_sg_entry_set_len(qm_sg_ptr, len);
|
|
}
|
|
|
|
static inline void dma_to_qm_sg_one_last(struct qm_sg_entry *qm_sg_ptr,
|
|
dma_addr_t dma, u32 len, u16 offset)
|
|
{
|
|
__dma_to_qm_sg(qm_sg_ptr, dma, offset);
|
|
qm_sg_entry_set_f(qm_sg_ptr, len);
|
|
}
|
|
|
|
static inline void dma_to_qm_sg_one_ext(struct qm_sg_entry *qm_sg_ptr,
|
|
dma_addr_t dma, u32 len, u16 offset)
|
|
{
|
|
__dma_to_qm_sg(qm_sg_ptr, dma, offset);
|
|
qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | (len & QM_SG_LEN_MASK));
|
|
}
|
|
|
|
static inline void dma_to_qm_sg_one_last_ext(struct qm_sg_entry *qm_sg_ptr,
|
|
dma_addr_t dma, u32 len,
|
|
u16 offset)
|
|
{
|
|
__dma_to_qm_sg(qm_sg_ptr, dma, offset);
|
|
qm_sg_ptr->cfg = cpu_to_be32(QM_SG_EXT | QM_SG_FIN |
|
|
(len & QM_SG_LEN_MASK));
|
|
}
|
|
|
|
/*
|
|
* convert scatterlist to h/w link table format
|
|
* but does not have final bit; instead, returns last entry
|
|
*/
|
|
static inline struct qm_sg_entry *
|
|
sg_to_qm_sg(struct scatterlist *sg, int len,
|
|
struct qm_sg_entry *qm_sg_ptr, u16 offset)
|
|
{
|
|
int ent_len;
|
|
|
|
while (len) {
|
|
ent_len = min_t(int, sg_dma_len(sg), len);
|
|
|
|
dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), ent_len,
|
|
offset);
|
|
qm_sg_ptr++;
|
|
sg = sg_next(sg);
|
|
len -= ent_len;
|
|
}
|
|
return qm_sg_ptr - 1;
|
|
}
|
|
|
|
/*
|
|
* convert scatterlist to h/w link table format
|
|
* scatterlist must have been previously dma mapped
|
|
*/
|
|
static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len,
|
|
struct qm_sg_entry *qm_sg_ptr, u16 offset)
|
|
{
|
|
qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset);
|
|
qm_sg_entry_set_f(qm_sg_ptr, qm_sg_entry_get_len(qm_sg_ptr));
|
|
}
|
|
|
|
#endif /* __SG_SW_QM_H */
|