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 12 static 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 */ 27 static inline struct dpaa2_sg_entry * 28 sg_to_qm_sg(struct scatterlist *sg, int sg_count, 29 struct dpaa2_sg_entry *qm_sg_ptr, u16 offset) 30 { 31 while (sg_count && sg) { 32 dma_to_qm_sg_one(qm_sg_ptr, sg_dma_address(sg), 33 sg_dma_len(sg), offset); 34 qm_sg_ptr++; 35 sg = sg_next(sg); 36 sg_count--; 37 } 38 return qm_sg_ptr - 1; 39 } 40 41 /* 42 * convert scatterlist to h/w link table format 43 * scatterlist must have been previously dma mapped 44 */ 45 static inline void sg_to_qm_sg_last(struct scatterlist *sg, int sg_count, 46 struct dpaa2_sg_entry *qm_sg_ptr, 47 u16 offset) 48 { 49 qm_sg_ptr = sg_to_qm_sg(sg, sg_count, qm_sg_ptr, offset); 50 dpaa2_sg_set_final(qm_sg_ptr, true); 51 } 52 53 #endif /* _SG_SW_QM2_H_ */ 54