crypto/caam/sg_sw_qm2.h

0001 /* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */
0002 /*
0003  * Copyright 2015-2016 Freescale Semiconductor, Inc.
0004  * Copyright 2017 NXP
0005  */
0006
0007 #ifndef _SG_SW_QM2_H_
0008 #define _SG_SW_QM2_H_
0009
0010 #include <soc/fsl/dpaa2-fd.h>
0011
0012 static inline void dma_to_qm_sg_one(struct dpaa2_sg_entry *qm_sg_ptr,
0013                     dma_addr_t dma, u32 len, u16 offset)
0014 {
0015     dpaa2_sg_set_addr(qm_sg_ptr, dma);
0016     dpaa2_sg_set_format(qm_sg_ptr, dpaa2_sg_single);
0017     dpaa2_sg_set_final(qm_sg_ptr, false);
0018     dpaa2_sg_set_len(qm_sg_ptr, len);
0019     dpaa2_sg_set_bpid(qm_sg_ptr, 0);
0020     dpaa2_sg_set_offset(qm_sg_ptr, offset);
0021 }
0022
0023 /*
0024  * convert scatterlist to h/w link table format
0025  * but does not have final bit; instead, returns last entry
0026  */
0027 static inline struct dpaa2_sg_entry *
0028 sg_to_qm_sg(struct scatterlist *sg, int len,
0029         struct dpaa2_sg_entry *qm_sg_ptr, u16 offset)
0030 {
0031     int ent_len;
0032
0033     while (len) {
0034         ent_len = min_t(int, sg_dma_len(sg), len);
0035
0036         dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), ent_len,
0037                  offset);
0038         qm_sg_ptr++;
0039         sg = sg_next(sg);
0040         len -= ent_len;
0041     }
0042     return qm_sg_ptr - 1;
0043 }
0044
0045 /*
0046  * convert scatterlist to h/w link table format
0047  * scatterlist must have been previously dma mapped
0048  */
0049 static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len,
0050                     struct dpaa2_sg_entry *qm_sg_ptr,
0051                     u16 offset)
0052 {
0053     qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset);
0054     dpaa2_sg_set_final(qm_sg_ptr, true);
0055 }
0056
0057 #endif /* _SG_SW_QM2_H_ */