sg_sw_qm2.h (1416B)
1/* SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause) */ 2/* 3 * Copyright 2015-2016 Freescale Semiconductor, Inc. 4 * Copyright 2017 NXP 5 */ 6 7#ifndef _SG_SW_QM2_H_ 8#define _SG_SW_QM2_H_ 9 10#include <soc/fsl/dpaa2-fd.h> 11 12static inline void dma_to_qm_sg_one(struct dpaa2_sg_entry *qm_sg_ptr, 13 dma_addr_t dma, u32 len, u16 offset) 14{ 15 dpaa2_sg_set_addr(qm_sg_ptr, dma); 16 dpaa2_sg_set_format(qm_sg_ptr, dpaa2_sg_single); 17 dpaa2_sg_set_final(qm_sg_ptr, false); 18 dpaa2_sg_set_len(qm_sg_ptr, len); 19 dpaa2_sg_set_bpid(qm_sg_ptr, 0); 20 dpaa2_sg_set_offset(qm_sg_ptr, offset); 21} 22 23/* 24 * convert scatterlist to h/w link table format 25 * but does not have final bit; instead, returns last entry 26 */ 27static inline struct dpaa2_sg_entry * 28sg_to_qm_sg(struct scatterlist *sg, int len, 29 struct dpaa2_sg_entry *qm_sg_ptr, u16 offset) 30{ 31 int ent_len; 32 33 while (len) { 34 ent_len = min_t(int, sg_dma_len(sg), len); 35 36 dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), ent_len, 37 offset); 38 qm_sg_ptr++; 39 sg = sg_next(sg); 40 len -= ent_len; 41 } 42 return qm_sg_ptr - 1; 43} 44 45/* 46 * convert scatterlist to h/w link table format 47 * scatterlist must have been previously dma mapped 48 */ 49static inline void sg_to_qm_sg_last(struct scatterlist *sg, int len, 50 struct dpaa2_sg_entry *qm_sg_ptr, 51 u16 offset) 52{ 53 qm_sg_ptr = sg_to_qm_sg(sg, len, qm_sg_ptr, offset); 54 dpaa2_sg_set_final(qm_sg_ptr, true); 55} 56 57#endif /* _SG_SW_QM2_H_ */