mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 09:50:04 +00:00
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>
85 lines
2 KiB
C
85 lines
2 KiB
C
/* 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_ */
|